Medical image diagnostic apparatus and scanning range setting method

Abstract

A medical image diagnostic apparatus according to the present embodiment includes an analysis section, an acquisition section, a setting section, and an output section. The analysis section analyzes a subject image obtained by photographing a subject to obtain a first boundary line and a second boundary line for defining a scan range of a scan for obtaining a medical image of the subject. The acquisition section acquires fixed scan range information for the photographing of the subject. The setting section sets the scan range based on one of the first boundary line and the second boundary line obtained by the analysis section and the acquired fixed scan range information. The output section outputs the scan range set by the setting section to be displayed on a monitor.

Description

Technical Field

[0001] The embodiments described herein generally relate to medical image diagnostic devices and methods for setting scanning range. Background Technology

[0002] In the past, medical imaging diagnostic devices sometimes selected an imaging protocol from a list that included pre-prepared imaging protocols. Each imaging protocol in the list was pre-prepared as a general imaging protocol for a specific examination, based on, for example, hospital regulations or dosage guidelines. Alternatively, medical imaging diagnostic devices equipped with an automatic imaging planning function are known. This automatic imaging planning function automatically sets the imaging range or FOV (field of view) or other scanning range related to multiple scans included in the imaging protocol, based on positioning images such as scout images or volume images associated with the subject, camera images, etc.

[0003] However, there are also situations, such as follow-up examinations, where it is desirable to use a different scanning range than other scans, in accordance with the policy of the facility using the medical imaging diagnostic device. If the scanning range set by the automatic imaging planning function does not match the scanning range corresponding to the facility's usage policy, manual correction of the scanning range related to the target scan is required after automatic setting. Therefore, setting the conditions for each scan is time-consuming, resulting in a decrease in the throughput of image diagnostics using the medical imaging diagnostic device. Summary of the Invention

[0004] The medical image diagnostic apparatus of this embodiment includes a resolution unit, an acquisition unit, a setting unit, and an output unit. The resolution unit resolves an image of a subject obtained by photographing the subject, thereby obtaining a first boundary line and a second boundary line, which define the scanning range for obtaining the medical image of the subject. The acquisition unit acquires fixed scanning range information for the photograph of the subject. The setting unit sets the scanning range based on one of the first boundary line and the second boundary line obtained by the resolution unit, and the acquired fixed scanning range information. The output unit outputs the scanning range set by the setting unit for display on a monitor. Attached Figure Description

[0005] Figure 1 This is a diagram illustrating an example of the configuration of an X-ray computed tomography (CT) apparatus according to the embodiment.

[0006] Figure 2 This is a diagram (1) showing an example of a protocol creation screen displayed on a display according to the implementation method.

[0007] Figure 3This is a diagram (2) showing an example of a protocol creation screen displayed on a display according to the implementation method.

[0008] Figure 4 This is a diagram (3) showing an example of a protocol creation screen displayed on a display according to the implementation method.

[0009] Figure 5 This is a diagram (4) showing an example of a protocol creation screen displayed on a display according to the implementation method.

[0010] Figure 6 This is a diagram illustrating an example of a scan execution screen displayed on a display according to an embodiment.

[0011] Figure 7 This is a flowchart illustrating an example of the process involved in setting the scan range in an X-ray CT apparatus according to an embodiment.

[0012] Figure 8 This is a diagram (1) showing an example of a screen display related to the setting of the automatic planning function for the scanning range displayed on the display according to the embodiment.

[0013] Figure 9 This is a diagram (2) showing an example of a screen display related to the setting of the automatic planning function for the scanning range displayed on the display according to the embodiment.

[0014] Figure 10 This is a diagram (3) showing an example of a screen display related to the setting of the automatic planning function for the scanning range displayed on the display according to the embodiment.

[0015] Figure 11 This is a diagram (4) showing an example of a screen display related to the setting of the automatic planning function for the scanning range displayed on the display according to the embodiment.

[0016] Figure 12 This is a diagram (5) showing an example of a screen display related to the setting of the automatic planning function for the scanning range displayed on the display according to the embodiment.

[0017] Figure 13 This is a diagram (6) showing an example of a screen display (6) related to the setting of the automatic planning function for the scanning range displayed on the display according to the embodiment. Detailed Implementation

[0018] The medical image diagnostic apparatus described in the following embodiments includes a resolution unit, an acquisition unit, a setting unit, and an output unit. The resolution unit resolves an image of a subject obtained by photographing the subject, thereby obtaining a first boundary line and a second boundary line, which define the scanning range for obtaining the medical image of the subject. The acquisition unit acquires fixed scanning range information for the photograph of the subject. The setting unit sets the scanning range based on one of the first boundary line and the second boundary line obtained by the resolution unit, and the acquired fixed scanning range information. The output unit outputs the scanning range set by the setting unit for display on a monitor.

[0019] Hereinafter, the medical image diagnostic apparatus, medical image diagnostic system, and scanning range setting method according to various embodiments will be described with reference to the accompanying drawings. Furthermore, in the following description, components that have the same or substantially the same function as those described in the previously described drawings will be given the same reference numerals and will be described repeatedly only where necessary. Additionally, even when showing the same parts, their dimensions or ratios may sometimes differ depending on the drawings. Furthermore, components that have the same or substantially the same function as those described in the previously described drawings may sometimes be distinguished by adding "a", "b", "c", or "d" at the end. Also, for example, from the viewpoint of ensuring the visual recognizability of the drawings, reference numerals will only be used for the main components in the description of each drawing; even components that have the same or substantially the same function as those described in the previously described drawings may sometimes not be given reference numerals.

[0020] This embodiment illustrates an X-ray computed tomography (CT) apparatus as a medical image diagnostic device for implementing a method for setting the imaging range. Figure 1 This diagram illustrates an example of the configuration of the X-ray CT apparatus 1 according to the embodiment. The X-ray CT apparatus 1 irradiates a subject P with X-rays from an X-ray tube 11, and the irradiated X-rays are detected by an X-ray detector 12. Based on the output from the X-ray detector 12, the X-ray CT apparatus 1 generates CT image (medical image) data related to the subject P. Here, the X-ray tube 11 and the X-ray detector 12 are examples of an imaging unit.

[0021] like Figure 1 As shown, the X-ray CT apparatus 1 includes a stand 10, an examination table 30, and a control console 40. Furthermore, in Figure 1For ease of explanation, multiple stands 10 are depicted. Each stand 10 is a scanning device configured to perform X-ray CT imaging on a subject P. Each examination table 30 is a transport device for placing and positioning the subject P, which is the object of X-ray CT imaging. Each control console 40 is a computer that controls the stands 10. For example, the stands 10 and examination table 30 are located in a CT examination room, and the control console 40 is located in a control room adjacent to the CT examination room. The stands 10, examination table 30, and control console 40 are connected via wired or wireless means to communicate with each other. Here, the stands 10 and examination table 30 are an example of an imaging unit.

[0022] Furthermore, the control console 40 does not necessarily have to be located in a control room. For example, the control console 40 can be located in the same room as the stand 10 and the examination bed 30. Alternatively, the control console 40 can be assembled into the stand 10.

[0023] Furthermore, in this embodiment, the rotation axis of the rotating frame 13 in the non-tilted state or the length direction of the top plate 33 of the examination bed 30 is defined as the Z-axis direction, the axis orthogonal to the Z-axis direction and horizontal relative to the ground is defined as the X-axis direction, and the axis orthogonal to the Z-axis direction and perpendicular to the ground is defined as the Y-axis direction.

[0024] Here, the X-ray CT device 1 is connected to other devices, for example, via an intra-hospital LAN (Local Area Network) installed within the hospital, enabling direct or indirect communication between them. For instance, the X-ray CT device 1 is connected to a PACS (Picture Archiving and Communication System) server that stores or processes medical images, other medical image diagnostic devices, or terminal devices for physicians to view images. These devices, for example, transmit and receive medical images according to the DICOM (Digital Imaging and Communications in Medicine) standard.

[0025] Furthermore, in systems equipped with the aforementioned devices, HIS (Hospital Information System) or RIS (Radiology Information System) are imported to manage various types of information. For example, the aforementioned system sends examination orders generated by terminal devices to various medical imaging diagnostic devices. Each medical imaging diagnostic device obtains patient information based on the examination orders received directly from the terminal devices or the patient list (medical device work list) generated by the PACS server that received the examination orders for each medical device.

[0026] like Figure 1 As shown, the stand 10 has an X-ray tube 11, an X-ray detector 12, a rotating frame 13, an X-ray high-voltage device 14, a control device 15, a wedge 16, a collimator 17, and a data acquisition system (DAS) 18.

[0027] X-ray tube 11 is a vacuum tube having a cathode (filament) that generates thermionic electrons and an anode (target) that receives the thermionic electrons and generates X-rays. Using high voltage supplied from the X-ray high-voltage device 14, the X-ray tube 11 irradiates thermionic electrons from the cathode toward the anode, thereby irradiating the subject P with X-rays. Here, X-ray tube 11 is an example of an X-ray generating unit. By switching the voltage supplied by the X-ray high-voltage device 14 for a predetermined number of views during X-ray irradiation, so-called dual-energy CT imaging can be achieved. Furthermore, in this embodiment, it is not necessary to be an X-ray CT device 1 capable of dual-energy CT imaging; it may also be an X-ray CT device 1 capable of only performing conventional single-energy CT imaging. Additionally, it is not limited to dual-energy CT imaging; it may also be an X-ray CT device 1 capable of performing data processing for three or more types of energy.

[0028] The X-ray detector 12 detects X-rays that have irradiated the object P from the X-ray tube 11 and passed through it, and outputs an electrical signal corresponding to the dose of the detected X-rays to the DAS 18. The X-ray detector 12 may, for example, have an X-ray detection element column formed by arranging multiple X-ray detection elements along an arc in the channel direction centered on the focal point of the X-ray tube 11. The X-ray detector 12 may also have a configuration in which multiple X-ray detection elements in the channel direction are arranged in multiple columns along the slice direction (row direction). Here, the X-ray detector 12 is an example of an X-ray detection unit.

[0029] Additionally, the X-ray detector 12 is, for example, an indirect conversion type detector having a grid, a scintillator array, and a light sensor array. The scintillator array has multiple scintillators. Each scintillator has a scintillator crystal that outputs light in an amount corresponding to the incident X-ray quantity. The grid is disposed on the X-ray incident surface side of the scintillator array and has an X-ray shield that absorbs scattered X-rays. Furthermore, the grid is sometimes referred to as a collimator (1-dimensional collimator or 2-dimensional collimator). The light sensor array has the function of converting the light into an electrical signal corresponding to the amount of light from the scintillators. For example, a photomultiplier tube (PMT) is used as the light sensor.

[0030] In addition, the X-ray detector 12 may also be a direct conversion type detector having a semiconductor element that converts incident X-rays into electrical signals.

[0031] The rotating frame 13 is an annular frame that supports the X-ray tube 11 and the X-ray detector 12 in opposition and rotates them via the control device 15 (described later). The field of view (FOV) is set at the opening 19 of the rotating frame 13. For example, the rotating frame 13 is a casting made of aluminum. In addition to supporting the X-ray tube 11 and the X-ray detector 12, the rotating frame 13 can also support the X-ray high-voltage device 14, the wedge 16, the collimator 17, and the DAS 18. Furthermore, the rotating frame 13 can also support... Figure 1 Various components not shown in the figure provide support. Here, the rotating frame 13 is an example of a rotating part.

[0032] The X-ray high-voltage device 14 includes a high-voltage generating device and an X-ray control device. The high-voltage generating device includes electrical circuits such as a transformer and a rectifier, generating a high voltage applied to the X-ray tube 11 and a filament current supplied to the X-ray tube 11. The X-ray control device controls the output voltage corresponding to the X-rays irradiated by the X-ray tube 11. The high-voltage generating device can be either a transformer or an inverter. The X-ray high-voltage device 14 can be mounted on a rotating frame 13 within the stand 10 or on a fixed frame (not shown) within the stand 10. Alternatively, the fixed frame can support the rotating frame 13 so that it can rotate. Here, the X-ray high-voltage device 14 is an example of an X-ray high-voltage unit.

[0033] The control device 15 includes a drive mechanism such as a motor and actuator, and a processing circuit including a processor and memory to control the drive mechanism. The control device 15 receives input signals from the input interface 43 or an input interface provided on the platform 10, and performs motion control on the platform 10 and the examination bed 30. For example, the control device 15 receives input signals and controls the rotation of the rotating frame 13, the tilting of the platform 10, or the movement of the examination bed 30.

[0034] Furthermore, the control device 15 rotates the rotating frame 13 around an axis parallel to the X-axis direction based on the tilt angle information input from the input interface mounted on the platform 10, thereby controlling the tilt of the platform 10. The control device 15 can be installed on either the platform 10 or the control console 40.

[0035] The wedge 16 is a filter used to adjust the amount of X-rays irradiated from the X-ray tube 11. Specifically, the wedge 16 is a filter that attenuates the X-rays irradiated from the X-ray tube 11 during transmission, so that the X-rays irradiated from the X-ray tube 11 onto the subject P are distributed in a predetermined manner. For example, the wedge 16 is a wedge filter or a bow-tie filter, which is constructed by machining aluminum or the like to a predetermined target angle or a predetermined thickness.

[0036] Collimator 17 defines the irradiation range of the X-rays transmitted through wedge 16. Collimator 17 supports multiple lead plates that shield the X-rays so that they can slide and adjust the shape of the slit formed by the multiple lead plates. In addition, collimator 17 is sometimes referred to as an X-ray aperture.

[0037] The DAS 18 reads an electrical signal corresponding to the dose of X-rays detected by the X-ray detector 12. The DAS 18 amplifies the read electrical signal and accumulates (adds) the signal during the viewing period, thereby acquiring detection data with a digital value corresponding to the dose of X-rays during that viewing period. This detection data is called projection data. The DAS 18 is implemented, for example, by an application-specific integrated circuit (ASIC) equipped with circuit elements capable of generating projection data. The projection data is transmitted to the control console 40 via a contactless data transmission device or the like. Here, the DAS 18 is an example of a data acquisition unit.

[0038] Furthermore, the detection data generated by DAS 18 is transmitted via optical communication from a transmitter equipped with a light-emitting diode (LED) mounted on the rotating frame 13 to a non-rotating part (e.g., a fixed frame) mounted on the platform 10. Figure 1 The receiver (with a photodiode omitted) transmits data to the control console 40. Furthermore, the method of transmitting data from the rotating frame 13 to the non-rotating part of the platform 10 is not limited to optical communication; any contactless data transmission method can be used, or a contact-type data transmission method can be used.

[0039] The examination table 30 is a device for placing and moving the subject P to be scanned. It includes a base 31, an examination table drive mechanism 32, a top plate 33, and a support frame 34. The base 31 is a housing that supports the support frame 34 and allows it to move in the vertical direction. The examination table drive mechanism 32 is a drive mechanism that moves the top plate 33 in the longitudinal direction (Z-axis direction) of the top plate 33, and includes a motor and actuators. The top plate 33 is a plate for placing the subject P. The top plate 33 is disposed on top of the support frame 34. The top plate 33 can protrude from the examination table 30 toward the stand 10 so that whole-body imaging of the subject P can be performed. The top plate 33 is, for example, formed of carbon fiber reinforced plastic (CFRP), which has good physical properties such as X-ray transmittance, rigidity, and strength. In addition, for example, the interior of the top plate 33 is hollow. The support frame 34 supports the top plate 33 so that it can move in the longitudinal direction of the top plate 33. Here, the examination bed 30 is an example of a medical examination bed device.

[0040] The console 40 includes a memory 41, a display 42, an input interface 43, and processing circuitry 44. Data communication between the memory 41, display 42, input interface 43, and processing circuitry 44 is via a bus. Furthermore, the console 40 and the platform 10 are described as separate units, but the platform 10 may also include the console 40 or a portion of its components.

[0041] The memory 41 is implemented, for example, by semiconductor memory elements such as RAM (Random Access Memory), flash memory, hard disk, optical disk, etc. For example, the memory 41 stores projection data and reconstructed image data. Additionally, the memory 41 stores, for example, imaging protocols corresponding to the examined area or purpose. Furthermore, the memory 41 stores various programs. Moreover, the storage area of ​​the memory 41 can be located either within the X-ray CT apparatus 1 or in an external storage device connected via a network. Here, the memory 41 is an example of a storage unit.

[0042] Here, a radiographic protocol is used to define the scanning sequence or various conditions of a series of CT scans, including at least one scan, defined for a specific purpose. In the following description, the radiographic protocol is sometimes referred to as a scan plan. Additionally, the radiographic protocol is sometimes simply referred to as a protocol. Furthermore, the editing of a radiographic protocol is sometimes referred to as protocol editing.

[0043] Display 42 displays various information. Display 42 may output, for example, medical images (CT images) generated by processing circuit 44, and a GUI (Graphical User Interface) for handling various operations from the operator. The GUI for handling various operations from the operator includes various operation screens related to the setting of scan ranges associated with multiple scans included in the imaging protocol. Various arbitrary displays can be used as display 42. For example, a liquid crystal display (LCD), a cathode ray tube (CRT) display, an organic electroluminescence display (OELD), or a plasma display can be used as display 42. Here, display 42 is an example of a monitor.

[0044] Furthermore, the display 42 can be installed anywhere in the control room. Alternatively, the display 42 can also be installed on the stand 10. The display 42 can be a desktop type or a tablet computer terminal capable of wirelessly communicating with the main body of the control console 40. Additionally, one or more projectors can be used as the display 42.

[0045] Input interface 43 receives various input operations from the operator, converts the received input operations into electrical signals, and outputs them to processing circuit 44. Input interface 43 may receive, for example, acquisition conditions when acquiring projection data, reconstruction conditions when reconstructing CT images, and image processing conditions when generating post-processed images from CT images. Input interface 43 may also receive various input operations from the operator related to setting the scan range on various operation screens. Here, input interface 43 is an example of an input unit.

[0046] As the input interface 43, a mouse, keyboard, trackball, switch, button, joystick, touchpad, and touch panel display can be appropriately used, for example. Furthermore, in this embodiment, the input interface 43 is not limited to having these physical operating components. For example, a processing circuit that receives electrical signals corresponding to input operations from an external input device separate from the device and outputs those electrical signals to the processing circuit 44 is also included in the example of the input interface 43. Additionally, the input interface 43 may also be provided on the stand 10. Furthermore, the input interface 43 may also be composed of a tablet computer terminal or the like capable of wireless communication with the main body of the console 40.

[0047] The processing circuit 44 controls the overall operation of the X-ray CT device 1. The processing circuit 44 has a processor and memory such as ROM and RAM as hardware resources. The processor, which executes programs expanded from the memory, performs system control functions 45, image generation functions 46, image processing functions 47, and display control functions 48, etc. Here, the processing circuit 44 is an example of a processing unit.

[0048] In system control function 45, processing circuit 44 controls various functions based on input operations received from the operator via input interface 43. Here, the processing circuit 44 implementing system control function 45 is an example of an acquisition unit, an analysis unit, and a setting unit.

[0049] For example, processing circuit 44 controls the creation, editing, and deletion of preset photographic protocols or inspection photographic protocols based on input operations received from the operator via input interface 43. For example, processing circuit 44 and the scanning execution screen (e.g., refer to...) Figure 6 The selected protocol displayed in the protocol display area controls the imaging of the subject P accordingly.

[0050] In the image generation function 46, the processing circuit 44 generates data obtained by performing preprocessing on the detection data output from the DAS 18, including logarithmic transformation, bias correction, inter-channel sensitivity correction, and beam hardening correction. The processing circuit 44 stores the generated data in the memory 41. Furthermore, the data before preprocessing (detection data) and the data after preprocessing are sometimes collectively referred to as projection data. The processing circuit 44 uses methods such as filter-corrected backprojection, successive approximation reconstruction, and machine learning to reconstruct the generated projection data (preprocessed projection data) to generate CT image data. The processing circuit 44 stores the generated CT image data in the memory 41.

[0051] In image processing function 47, processing circuit 44, based on input operations received from the operator via input interface 43, uses known methods to convert CT image data generated by image generation function 46 into tomographic image data or 3D image data of arbitrary cross sections. For example, processing circuit 44 performs 3D image processing on the CT image data, such as volume rendering, surface rendering, image value projection processing, MPR (Multi-Planar Reconstruction) processing, and CPR (Curved MPR) processing, to generate tomographic image data of arbitrary viewpoint orientation. Furthermore, image generation function 46 can also directly generate 3D image data, such as tomographic image data of arbitrary viewpoint orientation. Processing circuit 44 stores the tomographic image data or 3D image data in memory 41.

[0052] Additionally, in image processing function 47, processing circuit 44 generates image data for displaying various display screens related to the settings of scan ranges associated with multiple scans included in the photography protocol. In the following description, the settings of scan ranges associated with multiple scans included in the photography protocol are sometimes referred to as scan range settings.

[0053] In the display control function 48, the processing circuit 44 causes the display 42 to display images based on various image data generated by the image processing function 47. The images displayed on the display 42 include: CT images based on CT image data, cross-sectional images based on cross-sectional image data of arbitrary cross sections, and drawn images based on drawn image data of arbitrary viewpoint directions, etc. The images displayed on the display 42 include images for displaying operation screens or images for displaying notifications and warnings to the operator. Operation screens include various display screens related to scan range settings. Here, the processing circuit 44 implementing the display control function 48 is an example of an output unit (display control unit). Furthermore, if the processing circuit 44 is located outside the medical image diagnostic device, an output interface for outputting the output of the processing circuit 44 implementing the display control function 48 to an external location can also be an example of an output unit (display control unit).

[0054] Furthermore, the functions 45-48 are not limited to being implemented by a single processing circuit. Multiple independent processors can be combined to form the processing circuit 44, and each processor can execute its own program to implement the functions 45-48. Alternatively, the functions 45-48 can be appropriately distributed or integrated into one or more processing circuits.

[0055] Furthermore, while console 40 is described as a single console executing multiple functions, multiple functions can also be executed by individual consoles. For example, the functions of processing circuits 44, such as image generation function 46 and image processing function 47, can also be distributed among them.

[0056] Furthermore, the processing circuit 44 is not limited to being included in the console 40, but may also be included in an integrated server that processes detection data acquired by multiple medical imaging diagnostic devices. This integrated server, or the medical imaging diagnostic device involved in this embodiment, is not limited to setting the scanning range of multiple medical imaging diagnostic devices connected to an intra-hospital network; for example, it may also be able to set the scanning range of at least one medical imaging diagnostic device set up outside the hospital, such as an affiliated hospital. Alternatively, a computer such as a workstation equipped with the processing circuit 44 may be set up outside the hospital for common use by multiple medical imaging diagnostic devices set up in multiple locations, such as multiple hospitals.

[0057] Furthermore, post-processing can be performed by either the console 40 or an external workstation. Alternatively, processing can be performed simultaneously by both the console 40 and the workstation. The workstation can be, for example, a computer that appropriately utilizes a processor capable of implementing image generation function 46 and image processing function 47, as well as memory such as ROM and RAM as hardware resources.

[0058] exist Figure 1 Although not illustrated, when imaging is performed simultaneously with the injection of contrast agent into the X-ray CT device 1, the contrast agent injection device and the processing circuit 44 are connected in a communicable manner, so that the timing of the injection of contrast agent by the injection device is synchronized with the timing of imaging by the X-ray CT device 1.

[0059] Furthermore, in the reconstruction of X-ray CT image data, either full-scan reconstruction or half-scan reconstruction can be used. For example, in reconstruction processing function 444, in full-scan reconstruction mode, processing circuit 44 uses projection data of 360 degrees around the subject P. In half-scan reconstruction mode, processing circuit 44 uses projection data of 180 degrees plus a sector angle. In this embodiment, for simplicity, processing circuit 44 is set to use full-scan reconstruction mode, which reconstructs the image data using projection data of 360 degrees around the subject P.

[0060] Furthermore, the technology involved in this embodiment can also be applied to various types of X-ray CT devices 1, such as third-generation CT and fourth-generation CT. Here, third-generation CT is a rotating / rotate-type where the X-ray tube and detector are integrated and rotate around the subject. Fourth-generation CT is a stationary / rotate-type where multiple X-ray detection elements arranged in a ring array are fixed, and only the X-ray tube rotates around the subject.

[0061] Furthermore, the technology involved in this embodiment can be applied to both single-tube X-ray computed tomography apparatuses and so-called multi-tube X-ray computed tomography apparatuses in which multiple pairs of X-ray tubes and detectors are mounted on a rotating ring.

[0062] Furthermore, in this embodiment, an X-ray CT device 1 equipped with an integrating X-ray detector 12 is used as an example for explanation, but the technology involved in this embodiment can also be implemented as an X-ray CT device 1 equipped with a photon counting X-ray detector.

[0063] Furthermore, the X-ray CT apparatus 1 according to this embodiment can also be configured as a standing CT. In this case, instead of the movement of the top plate 33, a support portion configured to support the standing patient P and be movable along the rotation axis of the rotating part of the stand 10 can be provided, or the top plate 33 or the examination table 30 can be omitted. In addition, the X-ray CT apparatus 1 according to this embodiment can also be configured as a mobile CT or a dental CT where the stand 10 and the examination table 30 are movable.

[0064] Furthermore, this embodiment describes the use of an X-ray CT device 1 as a medical image diagnostic device, but is not limited thereto. The technology involved in this embodiment can be applied to other medical image diagnostic devices such as MRI devices, PET devices, SPECT devices, X-ray diagnostic devices, and ultrasound diagnostic devices. In this case, the control circuit of each medical image diagnostic device performs the same function as the processing circuit 44 involved in this embodiment.

[0065] Furthermore, the various controls involved in the condition settings described in this embodiment are not limited to those implemented by the console 40 of the X-ray CT apparatus 1, but can also be implemented by an external workstation, a PACS viewer, or a combination thereof. Alternatively, a platform 10 and an examination table 30 can be installed on the X-ray CT apparatus 1, and a portion of the functions of the console 40 can be implemented by a control device common to multiple medical imaging diagnostic devices in the hospital, including the X-ray CT apparatus 1. In this case, for example, the console 40 has an input interface 43 and a display 42 that displays a screen or GUI image from the control device. Input from the input interface 43 is sent to the control device via a communication network through a communication circuit (not shown) on the console 40. The control device processes the input, sets the scan range accordingly, and outputs an updated GUI image corresponding to the input via the communication circuit of the control device, which is then received by the communication circuit of the console 40. In this case, the GUI described later is partially implemented by the control device. The division of functions between the console 40 and the control device is not limited to this. Alternatively, the console 40 may update the GUI image corresponding to the input, while the control device may change / update the imaging conditions, scanning plan, or protocol information corresponding to the input or the update of the GUI image. The device used to implement the display control involved in editing the imaging protocol, including the setting of reconstruction conditions, as described in this embodiment, is an example of a medical information display control device.

[0066] Hereinafter, with reference to the accompanying drawings, the setting of the scan range related to the imaging protocol of the examination in image diagnosis performed using a medical image diagnostic device such as the X-ray CT apparatus 1 according to the embodiment will be described in more detail.

[0067] Furthermore, in this embodiment, the scanning range includes the imaging range used to define the start and end positions of the scan, as well as the scan size (FOV: Field of View).

[0068] In image diagnosis using medical imaging diagnostic equipment such as X-ray CT apparatus 1, the operator (e.g., the responsible technician or radiologist) who operates the medical imaging diagnostic equipment determines the examination content based on the examination order sent from the responsible physician and performs the examination. At this time, the operator sometimes selects the imaging protocol to be performed from a list including pre-prepared imaging protocols. Each imaging protocol in the list is pre-prepared as a general imaging protocol for a specific examination, based on, for example, hospital regulations or dosage guidelines. Here, the imaging protocol includes, for example, a localization scan, a non-contrast scan for each site, or a contrast scan for each site. That is, when acquiring X-ray CT image data based on one imaging protocol, multiple scans are performed and X-ray CT image data corresponding to each scan are acquired.

[0069] In image diagnosis using medical imaging diagnostic devices such as X-ray CT apparatus 1, when the operator creates or edits an imaging protocol for preset or examination purposes, sometimes the operator sets the scan range for the multiple scans included in the imaging protocol.

[0070] For example, sometimes the scan range is set manually for each scan. However, setting the scan range is itself time-consuming, so there is a need to simplify the operator's steps involved in setting the scan range.

[0071] For example, in medical imaging diagnostic devices equipped with automatic imaging planning functions, the scan range is sometimes set for multiple scans included in the imaging protocol. Here, the automatic imaging planning function automatically sets the scan range based on data obtained from various images such as positioning images (scout images or volume images), camera images, etc., according to the imaging conditions set within the protocol. However, there are also situations, such as follow-up examinations, where it is desirable to use a different scan range than other scans, in accordance with the policy of the facility using the medical imaging diagnostic device. If the scan range set by the automatic imaging planning function does not match the scan range corresponding to the facility's usage policy, it is necessary to manually correct the scan range related to the target scan after automatic setting. Therefore, it is required to simplify the operator's steps involved in setting the scan range.

[0072] In such cases, when setting the scan range is cumbersome, the throughput of image diagnosis using a medical imaging diagnostic device decreases. Therefore, in this embodiment, as described below, an X-ray CT apparatus 1 is disclosed, which is an example of a medical imaging diagnostic device capable of reducing the operator's operational steps involved in setting the scan range during the creation of imaging protocols. That is, in this embodiment, an X-ray CT apparatus 1 is disclosed as an example of a medical imaging diagnostic device capable of improving the throughput of image diagnosis.

[0073] The following uses Figures 2 to 13 The display screen shown on the monitor is described by the processing circuit 44. This display screen is, for example, a screen for users to set inspection conditions, and can be operated according to input from the input interface 43. The content displayed on the screen corresponds to the inspection information, and the content displayed on the screen changes accordingly with the user's operation input, so as to appropriately input, change, add, delete, etc., settings for the inspection information in a form corresponding to the change.

[0074] Figures 2-5 These are figures (1) to (4) showing an example of a protocol creation screen 170 displayed on the display 42 according to the embodiment.

[0075] Protocol creation screen 170 is an operation screen used to preset the imaging protocol. More specifically, protocol creation screen 170 is an operation screen in protocol creation screen 110 after the information of the subject P (patient information) has been registered, used to create or modify the object imaging protocol selected as the selected protocol for the subject P.

[0076] Figure 2 This example shows the initial state of the protocol creation screen 170. Figure 3 and Figure 4 This example shows the status of the protocol display in screen 170 during protocol creation. Figures 2-4 In the protocol creation screen 170, the processing circuit 44 displays the protocol selection area 300 and the protocol display area 500.

[0077] In the protocol selection area 300, the processing circuit 44, for example... Figure 2 As shown, the attribute selection unit 310 is displayed for setting patient attributes such as "adult" or "child". Additionally, the processing circuit 44, for example... Figure 2 As shown, the display shows the site selection unit 330 for setting examination sites such as "whole body", "head", "neck", "chest", "abdomen", "pelvis", "legs", and "arms". Here, the processing circuit 44 highlights the selected patient attributes or examination sites.

[0078] In the protocol selection area 300, the processing circuit 44, for example... Figure 2 As shown, a list of multiple preset photographic protocols applicable to the part selected in the part selection unit 330 is displayed in the list display area 350. In the following description, the list of photographic protocols may sometimes be simply referred to as a protocol list. In the list display area 350, the processing circuit 44, for example... Figure 2 As shown, icon 351 is displayed, which corresponds to at least one preset imaging protocol effective for the set patient attributes and examination site. "Helical" is icon 351 representing a protocol for performing a standard helical CT scan. "Subtraction" is icon 351 representing a protocol for obtaining a differential image of images obtained in two scans performed before and after contrast agent injection. Furthermore, for simplicity, the imaging protocol displayed as icon 351 will sometimes be referred to simply as "imaging protocol" in the following description. Additionally, sometimes the imaging protocol corresponding to icon 351 as imaging information will be described as icon 351.

[0079] Additionally, in the protocol selection area 300, the processing circuit 44, for example... Figure 2As shown, an icon 355 representing a new protocol is displayed in the list display area 350. The operator, for example, selects the icon 355 representing the new protocol to begin creating the protocol. At this time, the processing circuit 44, after creating the photographic protocol in accordance with the operator's selection of the icon 355 representing the new protocol, for example through subsequent processing, determines the display position of the icon 351 representing the photographic protocol being created.

[0080] As an example, in the protocol creation screen 170, after selecting the icon 355 representing a new protocol displayed in the list display area 350, the operator can drag and drop the icon 351 of the desired photography protocol from among the preset multiple photography protocol icons 351 to the protocol display area 500. The drag-and-drop operation can be performed using either a mouse or a touch panel.

[0081] At this time, based on the input operation received from the operator via the input interface 43, the processing circuit 44 makes the icon 351 of the selected photography protocol in the protocol selection area 300 an active display, highlighting it in contrast to other parts. Additionally, the processing circuit 44 displays the photography protocol represented by the selected icon 351 as the selected protocol icon 510a (icon 510) in the protocol display area 500.

[0082] Furthermore, the operator's operation for selecting an icon 351 of any photography protocol from the protocol selection area 300 and displaying it in the protocol display area 500 is not limited to drag-and-drop operations; other operation methods can also be used. For example, in the protocol creation screen 170, the operator clicks the icon 351 of the desired photography protocol in the list display area 350 displayed in the protocol selection area 300. Then, with the icon 351 of the desired photography protocol highlighted, the operator clicks the protocol display area 500. At this time, the processing circuit 44, based on the input operation received from the operator via the input interface 43, activates the clicked icon 351 of the photography protocol in the protocol selection area 300. Additionally, when the protocol display area 500 is clicked, the detailed information of the activated icon 351 of the photography protocol, i.e., the selected protocol icon 510, is displayed in the clicked protocol display area 500.

[0083] In the protocol display area 500, the processing circuit 44, for example... Figure 3As shown, icon 510 (icon 510a) displays detailed information indicating the selected photographic protocol. In the following description, the selected photographic protocol may sometimes be simply referred to as the selection protocol. The processing circuit 44 uses the information representing the operator's operations or elements of the photographic protocol constituting scanning, etc., included in the selection protocol as icon 510 representing detailed information of the selection protocol, and processes them in a time sequence (execution order), for example... Figure 3 The images are arranged from left to right on the screen.

[0084] Processing circuit 44, for example Figure 3 As shown, the imaging protocol represented by icon 351 for "subtraction" displays the radiation icon 511 indicating the ON operation of the radiation switch and the icon 515 indicating the injection of contrast agent, as information indicating the operator's operation. Below the radiation icon 511, a start mode icon 512 is displayed for setting the start mode. Setting the start mode refers to setting where the radiation switch can be pressed to start scanning, such as selecting "control panel," "stand," or "manual switch."

[0085] Additionally, processing circuit 44, for example Figure 3 As shown, the scan icons 513 for each of the imaging protocols included in the "subtraction" protocol, represented by icon 351 ("S-helix", "non-CE", "Real Prep (CT fluoroscopy with contrast agent monitoring)", and "Aterial (arterial phase imaging)", are displayed as information indicating the scans included in the selected protocol. In this way, each imaging protocol includes at least one scan.

[0086] In each scan icon 513, information related to the scan is displayed in a certain form using characters or images. For example, in Figure 3 Within a roughly rectangular frame 531, the name of the scan is displayed in the area 532 above it, and the type of scan is indicated by characters and icons in the area 536 near the center below it. Figure 3In the section 5361, examples of scan types displayed by characters and icons include "S-Helix (helical imaging for localization or scanogram imaging)," "Sub-Helical (helical imaging for subtraction)," and "Angiography Monitoring." Below this, in section 534, characters indicating "Link" settings for synchronizing conditions between scans are displayed, along with icons indicating the types of synchronization conditions. For example, in the "Non-CE" scan icons 513, icons 5341 indicate linking the Z-direction range (imaging range) within the scan or reconstruction range, and icons 5342 indicate linking the size (FOV) within the scan or reconstruction range. "S-Helix" is a scanogram, where "Link" is not displayed and imaging condition linkage is not performed. Within the "Artery" scan frame, icon 5341 indicates that "Link" is displayed, meaning imaging condition linkage is performed, and the Z-direction imaging range is the linkage object. In the "Angiography Monitoring" scan, next to the "Link" display, there is an icon 5343 indicating a mode that allows subsequent scans (in this case, "Artery" scans) to be performed under specific conditions that enable the scan to begin as early as possible after Prep.

[0087] In addition, the time required for the scan is further displayed in the bottommost area 535.

[0088] There are △-shaped protrusions 536 on the left and right sides of the roughly rectangular frame 531, where a speaker icon 5361 is displayed. The presence or absence of broadcast voice is indicated by the type of icon 5361 at the start of the scan (left side) and at the end of the scan (right side).

[0089] Additionally, processing circuit 44, for example Figure 3 As shown, a link icon 517 is displayed between the elements that are executed consecutively among the elements included in the selection protocol icon 510. Additionally, the processing circuit 44 displays an icon 519 indicating the range of the selected protocol. Figure 3 The rectangular box is represented by icon 519. Additionally, icon 519, which indicates the range of selected protocols, may not be displayed.

[0090] The various icons displayed within the frames of the aforementioned scan icon 513, radiation icon 511, start mode icon 512, link icon 517, and scan icon 513 can be changed accordingly to the user's input on that icon, and various conditions related to the protocol can be changed accordingly to that input. For example, corresponding to clicking the link icon 517 for "Angiography Monitoring," a display is set to link the "Angiography Monitoring" scan with the "Non-CE" scan (the same display as the link display between "Angiography Monitoring" and "Artery"). This can automatically and appropriately execute the scan after the link is established when the radiation switch is pressed at the start of the non-CE scan. The start timing of subsequent scans in the linked scan can be set to the elapsed time from the preceding event. For example, the start timing of subsequent scans can be set by elapsed time from the timing of pressing the radiation switch, the start of the "Non-CE" scan, the end of the scan, etc. This setting can also be set accordingly to the user's input on the protocol display area 500.

[0091] In addition, refer to Figure 2 and Figure 3 This describes a scenario where the content of the photography protocol can be confirmed in the protocol creation screen 170 by displaying the icon 510 representing the selected protocol using drag-and-drop operations, but it is not limited to this. Alternatively, the content of the photography protocol represented by icon 351 can be displayed using the following method.

[0092] In the protocol selection area 300, the processing circuit 44, as shown... Figure 4 As shown, scan list 353 is displayed. Scan list 353 represents the scans included in the photographic protocol selected by the operator from the list display area 350. Processing circuitry 44, for example... Figure 4 As shown, the icons representing each scan included in the photographic protocol, as indicated by icon 351 (representing "Contrast 3Phase"), are displayed as a scan list 353. Figure 4 In the example, scan list 353 includes icons for each scan representing "S-helix", "contrast monitoring", "helix", "helix", and "helix".

[0093] As an example, when the icon 351 of the desired photography protocol is highlighted, the operator clicks the highlighted icon 351 again. At this time, the processing circuit 44, based on the input operation received from the operator via the input interface 43, displays a scan list 353 showing the photography protocol represented by the clicked active icon 351. Furthermore, the operator can select scans included in the photography protocol represented by icon 351, i.e., scans in the scan list 353, in the same way as the operation on icon 351 within the list display area 350. The processing of the processing circuit 44 is also the same.

[0094] In addition, in the pop-up display of scan list 353, you can also... Figure 4 As illustrated, only the scan name is displayed; alternatively, it can be... Figure 2 and Figure 3 The protocol display area 500 displays in the same form as the display.

[0095] In this way, the operator can make the scan list 353 pop up by double-clicking the icon 351 of the photography protocol that they want to confirm in the list display area 350, and simple confirmation can also be made through the pop-up display.

[0096] Furthermore, in the display state of detailed information of the protocol based on scan list 353, it is also possible to perform operations such as adding, inserting, replacing, and deleting other photography protocols. See here for reference. Figure 4 , in order to Figure 3 The following example illustrates the case where the "Contrast 3 Phase" photography protocol icon 351 is further selected in the protocol creation screen 170.

[0097] As an example, the operator drags and drops the icon 351 of the desired "contrast 3-phase" photography protocol into the protocol display area 500. When the processing circuit 44 detects the start of a drag-and-drop operation related to icon 351 based on the input operation received from the operator via input interface 43, it displays icons 521 (521a-521d) in the protocol display area 500 indicating the position where the icon 510 representing detailed information of the photography protocol can be inserted. Figure 4 Icon 521 is illustrated with a solid line. This allows the operator to easily determine the position of icon 510, which corresponds to the "Contrast 3 Phase" photography protocol, when starting a drag-and-drop operation.

[0098] For example, the operator drags the icon 351 of the "Contrast Triple Phase" photography protocol to the area behind the protocol display area 500 (in... Figure 4 (The center is the position of icon 521d and its right side). At this time, the processing circuit 44 is as follows: Figure 4 As shown, an icon 510b displaying "contrast 3 phases" is added after (at the end) the icon 510a of "subtraction".

[0099] In addition, the operator can also drag the "contrast 3-phase" icon 351 to the upper space 523 of the protocol display area 500. At this time, the processing circuit 44 replaces the currently displayed "subtraction" icon 510a with the "contrast 3-phase" icon 510b.

[0100] Alternatively, the operator can drag the "subtraction" icon 510a currently displayed in the protocol display area 500 to the end of the protocol creation screen 170 or the list display area 350. In this case, the processing circuit 44 will delete the currently displayed "subtraction" icon 510a from the protocol display area 500. Furthermore, the processing circuit 44 can also separately display an icon in the protocol creation screen 170 indicating the drag destination for deleting the selected protocol icon 510 from the protocol display area 500.

[0101] Additionally, when multiple photography protocols are combined, the operator can, for example, use drag-and-drop to select the protocol icon 510 in the protocol display area 500. Figure 4 The icons 510a and 510b are rearranged by protocol. At this time, as described above, when the processing circuit 44 detects the start of a drag-and-drop operation related to the icon 510 in the protocol display area 500 based on the input operation received from the operator via the input interface 43, it displays icons 521 (521a to 521d) in the protocol display area 500 indicating the position where the icon 510 corresponding to the photography protocol can be inserted.

[0102] In addition, refer to Figure 4 This example illustrates protocol editing on a per-protocol basis, including adding, inserting, replacing, moving (rearranging), and deleting selected protocols in the protocol display area 500, but is not limited to this. For instance, in the protocol display area 500, drag-and-drop operations can be used to add or insert scans included in a photographic protocol on a per-scan basis. Similarly, icons for each scan included in the currently displayed icons 510 (510a, 510b) in the protocol display area 500 can be replaced, moved (rearranged), and deleted on a per-scan basis.

[0103] Furthermore, the processing circuit 44 can also, in response to the operator's input, release, for example, during the scanning of icons 513. Figure 3 The link between scans is set in a sequential execution manner as shown by link icon 517. In this case, the operator can insert the link at the position of link icon 517, whether on a protocol-by-protocol or scan-by-scan basis.

[0104] exist Figure 3 and Figure 4 In the protocol creation screen 170, when the operator selects the "Edit" button 225, the display screen changes to... Figure 5 The protocol production screen is 170.

[0105] Figure 5 This example shows the state after the protocol is read into the protocol creation screen (screen 170). Figure 5In the protocol creation screen 170, the processing circuit 44 displays the protocol display area 500 and the scan information display area 700.

[0106] The processing circuit 44 corresponds to the case where the operator selects the "Edit" button 225 while the protocol selection icon 510 is displayed in the protocol display area 500. Figure 5 As shown, the selected protocol is represented by icon 510, which is displayed in the protocol display area 500.

[0107] Operator in Figure 5 In the protocol creation screen 170, protocol editing operations such as adding, inserting, replacing, and deleting the photography protocol icon 351 can be performed. Furthermore, the processing circuit 44 can also display an icon 522 indicating the position where the scan icon 513 can be inserted. Alternatively, icon 521 can be displayed instead of icon 522. Additionally, in... Figure 3 and Figure 4 In the protocol creation screen 170, icon 522 can also be displayed.

[0108] In the photography information display area 750, the processing circuit 44, for example... Figure 5 As shown, information indicating the scanning range 791 (791a, 791b), scanning direction 792, or body position 793 is displayed on the human body image 790, such as a human body model or subject image. Additionally, the processing circuit 44 displays images obtained through scanogram photography (positioning photography) in the scan information display area 700, allowing for setting the scan range. Furthermore, the scanned images are displayed on the scan execution screen 130 (described later) during or after scanning, enabling user confirmation. The processing circuit 44 can also display images of the subject P obtained by the optical camera in the imaging information display area 750.

[0109] Additionally, processing circuit 44, for example Figure 5 As shown, in the detailed condition display area 775 of the photographic information display area 750, various information related to the scan, such as scan condition information 776 and reconstruction condition information 777, are displayed. Figure 5 In the example, the scanning condition information 776 includes tabs for each condition, indicating the scanning range "0.5mm × 80", scanning speed "fast", tube voltage [kV] "120", tube current [mA] "80", and rotation speed "0.5s / r". Additionally, in Figure 5In the example, the scan condition information 776 includes the display of dose indices “CTDI (Computed Tomography Dose Index) vol 0.7 mGy” and “DLP (Dose Length Product) 3.71 mGy.cm”. Additionally, in Figure 5 In the example, the information 777 of the reconstructed condition includes an icon 7773 representing the condition of the “body”.

[0110] Additionally, processing circuit 44, for example Figure 5 As shown, in the display of scanning condition information 776, an icon 7761 representing a magnified display of the scanning conditions is displayed. When the operator selects the icon 7761 representing the magnified display of scanning conditions, the processing circuit 44 displays detailed information about the scanning conditions related to the scan represented by the selected scanning icon 513. Similarly, the processing circuit 44, for example... Figure 5 As shown, in the display of reconstruction condition information 777, an icon 7771 representing a magnified display of reconstruction conditions is displayed. When the operator selects the icon 7771 representing the magnified display of reconstruction conditions, the processing circuit 44 displays detailed information about the reconstruction conditions related to the scan represented by the selected scan icon 513.

[0111] The operator is in Figure 5 When the protocol display area 500 of the protocol creation screen 170 displays a series of selected protocols represented by icon 510, which are registered as preset photography protocols, the user selects the "Save" button 227. At this time, corresponding to the selection of the "Save" button 227, the processing circuit 44 registers the series of selected protocols represented by icon 510 in the protocol display area 500 as preset photography protocols displayed by icon 351. Furthermore, when the user finishes creating the protocol, they select the "Close" button 229. At this time, corresponding to the selection of the "Close" button 229, the processing circuit 44 ends the display of the protocol creation screen 170.

[0112] The aforementioned protocol display area 500 is not limited to the protocol creation screen 170 where the photography protocol is preset; it can also be displayed in the protocol editing screen or the scan execution screen 130 (see reference). Figure 6 It is shown in ).

[0113] The protocol editing screen is an operation screen used to select, edit, and adjust the protocols used in the inspection. The protocol editing screen includes the aforementioned protocol display area 500, in which the protocol content is displayed in the same manner as displayed in the aforementioned protocol creation screen 170 or the scan execution screen 130 described later. Furthermore, the protocol editing screen can also be presented as a protocol adjustment screen.

[0114] Furthermore, the detailed conditions for each scan included in the photography agreement are mainly in the next stage of agreement editing (agreement adjustment), namely scan execution screen 130 (see reference). Figure 6 The protocol editing screen is primarily used to set the overall protocol flow, including the relationship between scans, the timing of the irradiation switch press, and the timing of contrast agent injection. Additionally, settings related to scan progress, such as the presence and content of pre- and post-scan audio instructions, and less likely to change in the overall protocol, such as head-first or foot-first positioning, are also set in this screen. Here, head-first refers to entering the stage 10 from the head side. Foot-first refers to entering the stage 10 from the feet side. Furthermore, since the radiographic protocol is mainly associated with body parts, the selection of radiographic body parts is also performed in this screen.

[0115] Figure 6 This diagram illustrates an example of a scan execution screen 130 displayed on the display 42 according to the embodiment. The scan execution screen 130 is an operation screen used to perform a check on multiple scans included in the photography protocol selected, edited, and adjusted in the protocol editing screen as a series of scans.

[0116] As an example, by operating the "Next" button or similar functions in the aforementioned protocol editing screen, the operator can switch the screen to the scan execution screen 130 while maintaining the display of the protocol display area 500. At this time, the processing circuit 44 reads the information displayed in the scan information display area 700, such as scan conditions, based on the operation input received by the operator via the input interface 43. Subsequently, the processing circuit 44 displays the scan execution screen 130, switching the screen from the protocol editing screen.

[0117] In the scanning execution screen 130, the processing circuit 44 and Figure 5 Similarly, the protocol production screen 170 displays a scan information display area 700, including a photography information display area 750 and a detailed conditions display area 775.

[0118] Additionally, in the scanning execution screen 130, the processing circuit 44, as shown... Figure 6As shown, the protocol display area 500 used when setting the protocol is displayed in the protocol editing screen during the previous protocol selection stage. In other words, the multiple scan icons 513 displayed in the protocol display area 500 of the scan execution screen 130 represent multiple scans performed on the subject P.

[0119] Additionally, in the scan execution screen 130, the processing circuit 44 controls the execution of multiple scans represented by the multiple scan icons 513 displayed in the protocol display area 500 within the scan range set as described above. For example, in the case where the operator selects the confirmation button 223 displayed as "Confirm," the processing circuit 44 executes the scan that is highlighted (in... Figure 6 (In the example, a scan of an "artery"). That is, in the CT scan control method according to the embodiment, the processing circuit 44 is controlled to perform multiple scans included in the imaging protocol within the scan range set as described above.

[0120] Furthermore, in the scan execution screen 130, for example, the processing circuit 44 displays the "scan" section, which represents the stage of scan execution in the inspection process, in a way that emphasizes it compared to other sections. The scan execution screen 130 displays the edited protocol, the detailed scan conditions specified in the protocol, and also allows the viewer to confirm the image obtained through scanning.

[0121] Here, the setting of the scanning range 791 involved in the embodiment will be explained with reference to the accompanying drawings. Figure 7 This is a flowchart illustrating an example of the process involved in setting the scan range in the X-ray CT apparatus 1 according to the embodiment. Figure 8 This is a diagram (1) showing an example of a screen display related to the setting of the automatic planning function for the scanning range displayed on the display according to the embodiment.

[0122] Figure 7 The process is set to the following state: when the scan execution screen 130 or the protocol creation screen 170 is displayed on the monitor 42, that is, when the photography protocol is selected, the scan icon 513 representing the setting object involved in the automatic setting of the scan range is selected from the multiple scans (scan icons 513) displayed in the protocol display area 500.

[0123] The processing circuit 44 (acquisition unit) acquires, for example, information about the scan range of the selected scan from the memory 41, namely, scan range information (S101). The memory 41 is configured to store information obtained by establishing a correspondence between the imaging protocol or scan, the imaging site, and the boundary. The boundary includes, for example, information such as setting the imaging start position of the imaging protocol "lung field detail" to "1 cm above the landmark point at the upper end of the right lung," which is the imaging start position or imaging end position relative to the landmark point of the imaging site. Then, the processing circuit 44 (output unit) acquires, for example, information about the scanning range of the selected scan from the memory 41, namely, scan range information (S101). Figure 8 As shown, in at least one of the scan execution screen 130 and the protocol creation screen 170, a virtual scan range (scan range 791) simulating the scan range for obtaining medical images of the subject through a selected scan is overlaid on a human body image 790 using a human body model, including a frontal image 790a and a side image 790b (S102). The virtual scan range is set, for example, based on the imaging site of the selected object and scan range information. Alternatively, the virtual scan range may be predetermined for each imaging site and stored in the memory 41.

[0124] The display of the virtual scan range (scan range 791) includes a first boundary line 7911 indicating the start position of the imaging and a second boundary line 7915 indicating the end position of the imaging. In other words, the first boundary line 7911 and the second boundary line 7915 are straight lines used to define the virtual scan range (scan range 791). Additionally, the virtual scan range (scan range 791) includes a display 7913 indicating the scan direction.

[0125] Additionally, the processing circuit 44 displays icons 801 and 803 as input objects for operations related to the display of the virtual scan range. Icon 801 is the input object for the display of the first boundary line 7911, indicating the start position of the photograph. For example, when an operation input is performed on icon 801, the processing circuit 44 detects that the start position of the photograph has been selected based on the output of the input interface 43 corresponding to that operation input. Icon 803 is the input object for the display of the second boundary line 7915, indicating the end position of the photograph. For example, when an operation input is performed on icon 803, the processing circuit 44 detects that the end position of the photograph has been selected based on the output of the input interface 43 corresponding to that operation input.

[0126] For example, the processing circuit 44 for implementing the display control function 48 sets at least one boundary line related to the scanning range on the human body image corresponding to the human body model for each photographic part, and displays a graphical interface (GUI) on the display 42 for setting whether to determine the boundary line of the scanning range based on the parsing processing of the image data.

[0127] The processing circuit 44 (setting unit) specifies a mode for determining the scan range for the selected scan (S103). Specifically, when only one of the start or end position of the imaging is selected, the processing circuit 44 specifies a second mode for the selected scan. In this second mode, the scan range 791 is determined based on the selected start and end positions of the imaging obtained through the automatic planning function, and fixed scan range information related to the selected scan. Figure 8 In the example shown, the state of icon 801 is selected. That is to say, in Figure 8 In the example shown, regarding the selected scan, the start position of the scan is when the automatic planning function for the scan range is enabled. On the other hand, the end position of the scan is when the automatic planning function for the scan range is disabled.

[0128] On the other hand, when neither the start position nor the end position of the photography is selected, the processing circuit 44 specifies a first mode for the selected scan, in which the scanning range is determined based on the start position and end position of the photography obtained through the automatic planning function.

[0129] After setting the applicable objects for the automatic planning function of the scan range, the processing circuit 44, for example in the protocol creation screen 170, stores the photographic protocol specified for determining the scan range as a preset photographic protocol in the memory 41, and then ends the process. Figure 7 The process is as follows. For example, in the scan execution screen 130, the processing circuit 44 performs an automatic planning function (S104-S106) for each of the multiple scans displayed in the protocol display area 500, which determines the scan range according to a specified mode and sets the determined scan range as the scan range for obtaining a medical image of the subject P in that scan. First, the processing circuit 44 (acquisition unit) takes a picture of the subject and acquires the subject image (body data) obtained by the picture (S104). For example, the acquisition unit acquires the image data of the subject. Then, the processing circuit 44 (setting unit) sets the scan range according to the specified mode (S105-S109). Specifically, the processing circuit 44 determines whether the first mode is specified for the scan of the object, that is, which of the first mode and the second mode is specified (S105).

[0130] (Mode 1)

[0131] Here, the automatic planning of the scan range related to the scan in which the first mode is specified is explained. When scanning an object, if it is determined that the first mode is specified (S105: Yes), the processing circuit 44 sets the scan range in the first mode (S106).

[0132] The processing circuit 44 (analysis unit) detects multiple parts of the subject included in the subject image. Specifically, the processing circuit 44 detects parts such as internal organs included in the subject image. For example, the processing circuit 44 detects parts such as internal organs based on anatomical landmarks, for at least one of the volume data in the positioning image and the volume data in the image used for diagnosis. Here, anatomical landmarks are points that represent the characteristics of specific bones, internal organs, blood vessels, nerves, cavities, etc. That is, the processing circuit 44 detects anatomical landmarks of specific internal organs, bones, etc., thereby detecting bones, internal organs, blood vessels, nerves, cavities, etc. included in the volume data. In addition, by detecting characteristic landmarks of the human body, the processing circuit 44 can also detect the positions of the head, neck, chest, abdomen, feet, etc. included in the volume data. Furthermore, the parts described in this embodiment mean that they are also included in the positions of bones, internal organs, blood vessels, nerves, cavities, etc.

[0133] For example, the processing circuit 44 (analysis unit) extracts anatomical feature points from the volume data of a localization image or the volume data of an image used in diagnosis, based on the values ​​of the voxels included in the volume data. Then, the processing circuit 44 compares the 3D positions of the anatomical feature points in information such as textbooks with the positions of the feature points extracted from the volume data, thereby removing inaccurate feature points from the extracted feature points and optimizing the positions of the extracted feature points. Thus, the processing circuit 44 detects each part of the subject included in the volume data. For example, the processing circuit 44 first uses a supervised machine learning algorithm to extract the anatomical feature points included in the volume data. Here, the supervised machine learning algorithm described above is an algorithm constructed using multiple teacher images with correctly configured anatomical feature points, such as using a decision forest.

[0134] Then, the processing circuit 44 (analysis unit) compares the extracted feature points with a model (human body model) representing the 3D positional relationships of anatomical feature points (anatomical landmarks) in the body, thereby optimizing the extracted feature points. Here, the model described above is constructed using the teacher images mentioned above, for example, using a point distribution model. The model defines the shape, positional relationships, and inherent points of the parts based on multiple teacher images with correctly manually configured anatomical feature points. In other words, the human body model is a model that simulates anatomical landmarks in the human body, and can also be called a virtual human body model. The virtual human body model can also represent the 3D positional relationships of anatomical feature points in the body (human body). That is, the processing circuit 44 compares the above model with the extracted feature points, thereby removing inaccurate feature points and optimizing the feature points.

[0135] As described above, the processing circuit 44 (analysis unit) can identify which location and what type of landmarks exist in the volume data of the positioning image or diagnostic image, and can detect various parts such as internal organs based on this information. For example, the processing circuit 44 uses information about the anatomical positional relationship between the target part and its surrounding parts to detect the location of the target part. As an example, when the target part is set as "lung", the processing circuit 44 obtains coordinate information corresponding to the identification code representing the lung's features, and obtains coordinate information corresponding to the identification codes representing the surrounding parts of the "lung", such as "ribs", "clavicle", "heart", and "diaphragm". Then, the processing circuit 44 uses the information about the anatomical positional relationship between the "lung" and its surrounding parts, as well as the obtained coordinate information, to extract the "lung" region from the volume data.

[0136] As described above, the processing circuit 44 (analysis unit) obtains the imaging start position and imaging end position based on the region of the object area extracted by analyzing the subject image and the scanning range information obtained from the memory 41. Furthermore, the processing circuit 44 (setting unit) determines the scanning range based on the obtained imaging start position and imaging end position (first boundary line and second boundary line).

[0137] That is, when the boundary line is determined, the processing circuit 44, which is the analysis unit, performs analysis processing based on the boundary line set on the human body image, the human body model, and the acquired image data, thereby determining at least one boundary line of the scanning range for CT scanning of the radiographic part of the subject. Specifically, the processing circuit 44 extracts anatomical feature points from the image data, compares the 3D positional relationship of the anatomical feature points in the human body model with the extracted feature points, thereby detecting the radiographic part in the image data, and determines at least one boundary line of the scanning range for CT scanning of the radiographic part of the subject based on the detected radiographic part and at least one boundary line on the human body image related to the scanning range. The processing circuit 44, which implements the setting unit, sets the scanning range displayed on the display 42 along with the image data based on the determined boundary line.

[0138] (Mode 2)

[0139] Next, we will explain the automatic planning of the scan range associated with the scan that has been assigned to mode 2.

[0140] When scanning the object, if it is determined that the second mode has been specified (S105: No), the processing circuit 44 sets the scanning range in the second mode (S107-S109). As described above, the processing circuit 44 (analysis unit) uses the region of the object part extracted by analyzing the subject image and the scanning range information obtained from the memory 41 to obtain the position where the automatic plan is set to be effective between the imaging start position and the imaging end position. Then, the processing circuit 44 (acquisition unit) acquires the specified one of the obtained imaging start position and imaging end position (S107). In addition, in addition to the scanning range information obtained in step S101, the processing circuit 44 (acquisition unit) also acquires, for example, information on a fixed scanning range related to the selected scan from the memory 41 (S108). The memory 41 is configured to store, in addition to the scanning range information, information on the Z-direction length corresponding to the imaging protocol or scan, the imaging part, and the edge (fixed scanning range information). Furthermore, the fixed scanning range information can also be acquired in the processing of step S101. Subsequently, the processing circuit 44 (setting unit) determines the scanning range based on either the obtained start position or end position of the photography, and the fixed scanning range information obtained from the memory 41 (S109).

[0141] Then, the processing circuit 44 (output unit) outputs the scanning range 791 of each of the multiple scans set in the specified first mode or second mode, and displays it on the display 42 (S110). Specifically, the processing circuit 44 overlays the scanning range 791 of the scan selected at that moment onto the human body image 790, which includes the frontal image 790a and the side image 790b.

[0142] The processing circuit 44 (photographic unit) performs a CT scan on the subject P within a scan range set in a designated mode, either mode 1 or mode 2 (S111). Afterwards, the processing circuit 44 (output unit) outputs the scanned image (reconstructed image) to the display 42 and displays the image on the display 42 (S112). For example, the processing circuit 44 displays the scanned image in the photographic information display area 750 of the scan execution screen 130. The processing circuit 44 in... Figure 6 In the scan execution screen 130 shown, for example, the image obtained by scanning is displayed in the display area to the right of the human body image 790, or in a place that replaces the human body image 790.

[0143] In this way, in the medical image diagnostic apparatus according to this embodiment, the processing circuit 44 can limit the applicable objects of the automatic planning function according to the output of the input interface 43 corresponding to the user's operation input. Specifically, in the medical image diagnostic apparatus according to this embodiment, a mechanism is provided to switch the automatic planning function on / off for either the start position or the end position of the imaging.

[0144] According to this configuration, for example, in follow-up examinations where it is desired to apply a different scanning range than other scans in accordance with the policy of the facility using the medical imaging diagnostic device, the hassle of manually correcting the scanning range related to the target scan after automatic setting can be reduced. Alternatively, for any scan, the automatic setting of the scanning range can be temporarily turned off and then switched back to automatic setting, or the automatic setting can be switched between the start and end positions of the imaging and then applied again. Therefore, the medical imaging diagnostic device according to this embodiment can reduce the hassle of setting conditions for each scan and improve the throughput of image diagnosis using the medical imaging diagnostic device.

[0145] Furthermore, the displayed scanning range 791, including the virtual scanning range, can also be adjusted by the operator through input. For example, if the input interface 43 includes a mouse, consider using the mouse to adjust the scanning range. The size adjustment of the scanning ranges 791a and 791b is mainly in the Z and X directions in the frontal image 790a, and mainly in the Z and Y directions in the side image 790b. On the other hand, when adjusting the position of the photographic area, it is convenient to allow the frame representing the photographic area to be moved in any direction. When the frame representing the photographic area is selected, during the first button operation of the mouse (e.g., right click), the processing circuit 44 moves the frame in any direction in accordance with the movement direction of the mouse. On the other hand, during the second button operation of the mouse (e.g., left click), the processing circuit 44 performs display control to move the frame only vertically or only horizontally on the screen. This control is performed by extracting the vertical or horizontal component from the movement direction of the mouse and moving it accordingly.

[0146] The selection of the up / down and left / right directions can be set, for example, to the direction in which the movement initially exceeds a predetermined amount after the second button operation begins. For example, corresponding to the second button operation, the displacement in the up / down and left / right directions are individually accumulated during the operation, and the direction in which the accumulated amount first exceeds a predetermined threshold is selected as the movement direction. When the up / down direction is selected, the movement of the box corresponding to the mouse can also be restricted (e.g., prevented from moving) during this accumulation period. When the first movement direction (e.g., up / down) is selected, the processing circuit 44 restricts the movement of the box to the second movement direction (left / right) and moves it to the first movement direction corresponding to the mouse operation direction. When the second movement direction is selected, the processing circuit 44 restricts the movement of the box to the first movement direction and moves it to the second movement direction corresponding to the mouse operation direction. Corresponding to the end of the second button operation, the processing circuit 44 releases the restriction on the movement direction. Through this control, the adjustment of the scanning ranges 791a and 791b can be performed more efficiently.

[0147] (Second Implementation)

[0148] Furthermore, in the first embodiment, an automatic planning function is described for the start or end position of photography, but it is not limited to this.

[0149] In the medical image diagnostic device according to this embodiment, the processing circuit 44, as the object of the operation input for displaying the virtual scan range, displays an icon identical to icon 801 or icon 803 in the center of the virtual scan range (e.g., Figure 8 The icon is located between icons 801 and 803. This icon is the object for the operation input that indicates the location of the camera center.

[0150] For example, when an operation input is made to the icon, the processing circuit 44 detects that a camera center position has been selected based on the output of the input interface 43 corresponding to the operation input. When a camera center position is selected, the processing circuit 44 specifies a second scan mode for the selected scan. In this second mode, the camera center position is determined by an automatic planning function, and the scan range 791 is determined accordingly based on either the camera start position or the camera end position, as well as fixed scan range information related to the selected scan.

[0151] In addition, the processing circuit 44 can also display the position of the camera center in other display modes. Figure 9 This is a diagram illustrating an example (2) of the screen display related to the setting of the automatic scanning range planning function shown on the display according to the embodiment. The processing circuit 44 displays icon 805 as an operation input for displaying the virtual scanning range. Icon 805 allows the operator to select the display of the photographic object part by displaying it in a drop-down menu. In addition, the display of icon 805 is also an operation input for displaying the photographic center position. For example, when an operation input is made to icon 805, the processing circuit 44 detects the case where the photographic center position is selected based on the output of the input interface 43 corresponding to the operation input.

[0152] In this way, in the medical image diagnostic apparatus according to this embodiment, the processing circuit 44 can limit the applicability of the automatic planning function according to the output of the input interface 43 corresponding to the user's operation input. Specifically, in the medical image diagnostic apparatus according to this embodiment, a mechanism for turning the automatic planning function for switching the imaging center position on / off is provided. According to this configuration, for example, in scanning modes that do not involve movement of the examination table, such as conventional scanning or volume scanning (e.g., dynamic volume scanning (Non-Helical)), the same effect as in the above-described embodiment can be obtained.

[0153] (Third Implementation)

[0154] Furthermore, in the medical image diagnostic device according to the first embodiment, fixed scanning range information can also be input through operator input. Figure 10 This is a diagram (3) showing an example of a screen display related to the setting of the automatic planning function for the scanning range displayed on the display according to the embodiment.

[0155] For example, when only one of the start or end positions of the photography is selected, the processing circuit 44 displays the input field 807 for the photography length in the Z direction. Based on the output of the input interface 43 corresponding to the operator's input, the processing circuit 44 obtains the input photography length as fixed scan range information related to the scanning of the object, and sets the scan range in the second mode. Furthermore, the processing circuit 44, for example... Figure 9 As illustrated, a selection screen including icon 805 for the photographic object can also be displayed. When an operation input is made to icon 805, the photographic length in the Z direction, which corresponds to the selected part, is obtained from the output of the input interface 43 corresponding to the operation input and stored in the memory 41 as fixed scan range information.

[0156] According to this configuration, the scanning range set by the automatic planning function can be closer to the scanning range expected by the operator, thus reducing the trouble of manually correcting the scanning range and increasing the throughput of image diagnosis using medical image diagnostic devices.

[0157] (Fourth implementation)

[0158] Furthermore, the medical image diagnostic device according to the first embodiment may also be configured to allow for priority settings. Figure 11 This is a diagram (4) showing an example of a screen display related to the setting of the automatic planning function for the scanning range displayed on the display according to the embodiment.

[0159] The processing circuit 44 also displays icons 809 and 811 as operation inputs for displaying the virtual scan range. Icons 809 and 811 are operation inputs that specify which position, the start position or the end position, should be prioritized when setting the scan range via the automatic planning function in a manner that satisfies the minimum scan range requirement. For example, when an operation input is made for icon 809, the processing circuit 44 detects, based on the output of the input interface 43 corresponding to that operation input, that the start position of the scan has been selected as the priority setting. When an operation input is made for icon 811, the processing circuit 44 detects, based on the output of the input interface 43 corresponding to that operation input, that the end position of the scan has been selected as the priority setting.

[0160] In addition, the processing circuit 44 does not have to display icons 801, 803, 809, and 811 all at once. It can also switch between displaying the screen for setting the applicable object, which includes icons 801 and 803, and displaying the screen for setting priority, which includes icons 809 and 811.

[0161] Furthermore, when prioritizing, the processing circuit 44 can, for example, obtain the minimum scan range specification based on the same operation input as the scan range adjustment described above. Alternatively, the minimum scan range can be stored as fixed scan range information in the memory 41. Additionally, the processing circuit 44 can also obtain the minimum scan range specification from previous inspection information of the same subject P.

[0162] For example, when the scanning range set by the first mode or the second mode does not meet the minimum scanning range specification, the processing circuit 44 expands the other side while maintaining the selected one of the imaging start position and imaging end position, thereby determining the scanning range.

[0163] Alternatively, icons similar to 809 and 811 can be used to configure a system capable of prioritizing the image center position. In this case, the processing circuit 44 expands at least one of the image start position and image end position while maintaining the image center position, determining a specified scan range that satisfies the minimum scan range.

[0164] In this way, in the medical image diagnostic apparatus according to this embodiment, the processing circuit 44 can, according to the output of the input interface 43 corresponding to the user's operation input, set the object that should be prioritized when setting the scan range among the applicable objects of the automatic planning function. Specifically, the medical image diagnostic apparatus according to this embodiment is provided with a mechanism for switching the start / stop of the priority setting among the applicable objects of the automatic planning function. According to this configuration, the scan range set by the automatic planning function can be closer to the scan range desired by the operator, thus reducing the trouble of manually correcting the scan range and improving the throughput of image diagnosis using the medical image diagnostic apparatus.

[0165] (Fifth Embodiment)

[0166] Furthermore, in the above embodiments, the applicable settings for the automatic planning function for the start position, end position, and center position of the photography have been described, but the applicable settings for the automatic planning function for the FOV of the scanning range can also be applied in the same way. Figure 12 This is a diagram (5) showing an example of a screen display related to the setting of the automatic planning function for the scanning range displayed on the display according to the embodiment.

[0167] Furthermore, in the medical image diagnostic device according to this embodiment, the first boundary line 7911, the second boundary line 7915, the boundary line 7914, and the boundary line 7916 define the size of the field of view (FOV) within the scanning range.

[0168] As an example, processing circuit 44 also displays icon 802 as an object of operation input for displaying the virtual scan range. Icon 802 is an object of operation input used to specify the applicable object for the automatic planning function to set the size of the FOV in the scan range. For example, when operation input is performed for icon 802, processing circuit 44 detects the selected FOV size based on the output of input interface 43 corresponding to the operation input. At this time, the center position of the FOV can be obtained as fixed scan range information. The center position of the FOV can also be obtained based on the operator's operation input or previous inspection information of the same subject P.

[0169] As an example, processing circuit 44 also displays icon 802 as an object of operation input for displaying the virtual scan range. Icon 802 is an object of operation input used to specify the object to which the center position of the FOV in the scan range is set for the automatic planning function. For example, when operation input is performed for icon 803, processing circuit 44 detects that the center position of the FOV has been selected based on the output of the input interface 43 corresponding to that operation input.

[0170] In this case, the processing circuit 44 obtains a specification of the minimum FOV size that should be ensured based on the operator's operation input or previous inspection information of the same subject P.

[0171] Alternatively, the processing circuit 44 may specify the maximum magnification of the FOV based on the operator's input or previous inspection information of the same subject P.

[0172] When the scanning range set by the first mode or the second mode does not meet at least one of the specified minimum FOV size and maximum FOV magnification, the processing circuit 44 expands the FOV size while maintaining the center position of the FOV, thereby determining the scanning range. Alternatively, it may choose not to use either the minimum FOV size or the maximum FOV magnification.

[0173] In this way, in the medical image diagnostic apparatus according to this embodiment, the processing circuit 44 can limit the applicable objects of the automatic planning function according to the output of the input interface 43 corresponding to the user's operation input. Specifically, in the medical image diagnostic apparatus according to this embodiment, a mechanism is provided to switch the automatic planning function on / off for at least one of the center position or size of the field of view (FOV). According to this configuration, the pixel size (magnification) can be maintained, thus facilitating image comparisons such as follow-up examinations, between different examinations, between different patients, or between different times of the same patient, thereby improving the throughput of image diagnosis using the medical image diagnostic apparatus.

[0174] (Sixth Embodiment)

[0175] Furthermore, in the above embodiments, the operator can also be notified of the content within the scanning range adjusted by the automatic planning function. Figure 13 This is a diagram (6) showing an example of a screen display (6) related to the setting of the automatic planning function for the scanning range displayed on the display according to the embodiment.

[0176] When the automatic planning function is set to start during the scanning process for the creation of the photography protocol or the adjustment of the photography protocol before the start of the scan, and the positioning photography is performed, the processing circuit 44 highlights the items (e.g., the determined boundary lines) that have been automatically adjusted by the automatic planning function based on the image obtained by the positioning photography. Figure 13 This example illustrates the case where the camera's start position is automatically adjusted. In this case, the processing circuit 44, as shown... Figure 13 As shown, the first boundary line 7911 indicating the start position of the photograph and the display 7913 indicating the scanning direction are highlighted to notify the operator. Alternatively, the display 7913 indicating the scanning direction can be left unhighlighted. Furthermore, the operator can be notified by alternating between a highlighted state and a non-highlighted state of automatically adjusted items. Additionally, notification to the operator can also be achieved through speaker-based voice output.

[0177] According to this configuration, when the operator selects an effective protocol for the automatic photography plan function and performs positioning photography, the operator can easily grasp the automatically adjusted items, and thus the operator can easily determine whether the scan was set according to the intended settings.

[0178] (Seventh Embodiment)

[0179] Furthermore, in the above embodiments, an example is shown where a virtual scan range or a set scan range 791 is overlaid on a human body image 790 using a human body model, but this is not the only possibility. The virtual scan range or the set scan range 791 may also be overlaid on other images.

[0180] For example, it can be configured to use a human model before scanogram imaging and use the subject image obtained by the scanogram, i.e., by a low-dose CT scan, after scanogram imaging. In addition, in the case of spiral imaging as a scanogram or conventional scanning without movement of the examination table 30 (dynamic volume scan), the processing circuit 44 can also generate frontal image data and side image data based on the 3D image obtained by the scan, and display the frontal image 790a and the side image 790b on the display 42.

[0181] Alternatively, the medical image diagnostic device according to the embodiment may also have an optical camera configured to take pictures of the subject P placed on the top plate 33 of the examination bed 30. In this case, the processing circuit 44 may also overlay a virtual scan range or a set scan range 791 on the photographic image obtained by the optical camera. Alternatively, the processing circuit 44 may also obtain the photographic image of the subject P placed on the top plate 33 of the examination bed 30 from an optical camera such as a monitoring camera in the examination room where the medical image diagnostic device is located, which is installed outside the medical image diagnostic device.

[0182] In addition, the processing circuit 44 is not limited to the subject image obtained by scanning, but can also perform automatic planning of the scanning range based on the photographic image obtained by the optical camera.

[0183] The term "processor" used in the above description refers to circuits such as CPU, GPU, ASIC, and Programmable Logic Device (PLD). PLDs include Simple Programmable Logic Device (SPLD), Complex Programmable Logic Device (CPLD), and Field Programmable Gate Array (FPGA). The processor performs its function by reading and executing a program stored in a storage circuit. The storage circuit storing the program is a computer-readable non-volatile recording medium. Alternatively, instead of storing the program in a storage circuit, the program can be directly loaded into the processor's circuitry. In this case, the processor performs its function by reading and executing the program loaded into the circuitry. Alternatively, the function corresponding to the program can be implemented through a combination of logic circuits, rather than executing the program. Furthermore, the processors in this embodiment are not limited to being configured as a single circuit; multiple independent circuits can be combined to form a single processor and perform its function. Furthermore, it is also possible to... Figure 1 The multiple components are integrated into a single processor to perform their functions.

[0184] According to at least one embodiment described above, the throughput of image diagnosis using a medical image diagnostic device can be improved.

[0185] Furthermore, embodiments of the invention have been described, but these embodiments are given by way of example and are not intended to limit the scope of the invention. This new embodiment can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included within the scope or spirit of the invention, and within the scope of the invention as set forth in the patent claims and its equivalents.

[0186] Regarding the above-described embodiments, etc., the following notes are disclosed as one aspect and optional features of the invention.

[0187] (Postscript 1)

[0188] A medical image diagnostic device, comprising:

[0189] The analysis unit analyzes the image of the subject obtained by photographing the subject, thereby obtaining a first boundary line and a second boundary line, which are used to delineate the scanning range of the scan with respect to the medical image of the subject.

[0190] The acquisition unit acquires fixed scanning range information about the photograph of the subject.

[0191] The setting unit sets the scanning range based on one of the first boundary line and the second boundary line obtained by the analysis unit, and the obtained fixed scanning range information; and

[0192] The output unit outputs the scan range set by the setting unit for display on the monitor.

[0193] The aforementioned medical image diagnostic device has the function of determining two boundaries through analysis, and specifically only analyzes one side, while the other side is supplemented by "fixed scanning range information about the photograph of the subject", thereby achieving the technical effect of reducing computational processing load and computation time.

[0194] (Postscript 2)

[0195] Alternatively, the acquiring unit may acquire an image of the subject.

[0196] The output unit sets at least one boundary line related to the scanning range for each photographic part on the human body image corresponding to the human body model, and displays a graphical interface on the monitor. This graphical interface is used to set whether to perform the determination of the boundary line of the scanning range based on the analytical processing of the subject image.

[0197] When the determination is set to be performed, the analysis unit performs the analysis process based on the boundary lines set on the human body image, the human body model, and the subject image, thereby determining at least one boundary line of the scanning range for scanning the photographic area of ​​the subject.

[0198] The output unit displays the scan range based on the determined boundary line on the monitor along with the image of the subject.

[0199] (Note 3)

[0200] Alternatively, the human body model can represent the 3D positional relationships of anatomical feature points within the body.

[0201] The analytical unit

[0202] Extract anatomical feature points from the image of the subject.

[0203] The 3D positional relationship of anatomical feature points in the human body model is compared with the extracted feature points to detect the photographic areas in the subject image.

[0204] Based on the detected imaging region and at least one boundary line on the human image related to the scanning range, at least one boundary line of the scanning range for scanning the imaging region of the subject is determined.

[0205] The setting unit sets the scanning range that is displayed on the monitor together with the image of the subject, based on the determined boundary line.

[0206] (Postscript 4)

[0207] Alternatively, the at least one boundary line defined on the human body image may have: a first boundary line indicating one of the start and end positions of the photograph within the scanning range of the human body image, and a second boundary line indicating the other of the start and end positions.

[0208] The medical image diagnostic device further includes: an input unit that accepts operation input for specifying only one of the first boundary line and the second boundary line.

[0209] When the set scan range does not meet the minimum scan range that should be ensured as a scan range based on the operation input, the setting unit expands the other while maintaining one of the start position and the end position, thereby setting the scan range displayed on the monitor together with the subject image in a manner that meets the minimum scan range.

[0210] (Note 5)

[0211] Alternatively, the at least one boundary line defined on the human body image may have: a first boundary line indicating one of the start and end positions of the photograph within the scanning range of the human body image, and a second boundary line indicating the other of the start and end positions.

[0212] The medical image diagnostic device further includes an input unit that, in setting the scanning range on the human body image, accepts operation input specifying which of the first boundary line and the second boundary line should be prioritized for maintenance.

[0213] The setting unit expands one of the start position and the end position specified by the operation input while maintaining the other, thereby setting the scan range displayed on the monitor together with the subject image in a manner that satisfies the minimum scan range that should be ensured as the scan range based on the operation input.

[0214] (Note 6)

[0215] Alternatively, the setting unit may specify a minimum scanning range that should be ensured as the scanning range on the human body image based on previous examination information of the same subject. If the set scanning range does not meet the minimum scanning range, the setting unit may expand one of the start position and the end position while maintaining the other position, thereby satisfying the minimum scanning range, and set the scanning range displayed on the monitor together with the subject image.

[0216] (Note 7)

[0217] Alternatively, the at least one boundary line defined on the human body image may have: a first boundary line indicating one of the start and end positions of the photograph within the scanning range of the human body image, and a second boundary line indicating the other of the start and end positions.

[0218] The medical image diagnostic device further includes: an input unit that accepts operation input for specifying the location of the imaging center within the scanning range of the human body image.

[0219] The acquisition unit also acquires fixed scanning range information related to scanning modes that do not involve movement of the examination bed.

[0220] The setting unit sets the scanning range displayed on the monitor together with the subject image based on one of the first boundary line and the second boundary line obtained corresponding to the imaging center position, and the fixed scanning range information.

[0221] (Note 8)

[0222] Alternatively, when the set scanning range does not meet the minimum scanning range that should be ensured based on the scanning range of the operation input, the setting unit expands at least one of the first boundary line and the second boundary line while maintaining the position of the imaging center, thereby satisfying the minimum scanning range, and sets the scanning range displayed on the monitor together with the subject image.

[0223] (Note 9)

[0224] Alternatively, the setting unit may specify a minimum scanning range that should be ensured as the scanning range on the human body image based on previous examination information of the same subject. If the set scanning range does not meet the minimum scanning range, at least one of the first boundary line and the second boundary line may be expanded while maintaining the position of the imaging center, thereby satisfying the minimum scanning range, and the scanning range displayed on the monitor together with the subject image may be set in this manner.

[0225] (Postscript 10)

[0226] Alternatively, the input unit may accept operation inputs in the setting of the scanning range for specifying that the position of the imaging center should be maintained first.

[0227] The setting unit expands at least one of the first boundary line and the second boundary line while maintaining the position of the imaging center, thereby setting the scanning range in a manner that satisfies the specified minimum scanning range.

[0228] (Postscript 11)

[0229] Alternatively, the at least one boundary line defined on the human body image may have: a first boundary line indicating one of the start and end positions of the photograph within the scanning range of the human body image, and a second boundary line indicating the other of the start and end positions.

[0230] The first boundary line and the second boundary line define the size of the field of view (FOV) within the scan range.

[0231] The medical image diagnostic device also includes: an input unit that accepts operation input for specifying the size of the FOV.

[0232] When the setting unit receives the operation input, it sets the scanning range to be displayed on the monitor along with the image of the subject.

[0233] (Postscript 12)

[0234] Alternatively, the input unit may accept operation input for specifying the center position of the FOV.

[0235] When the setting unit receives an operation input specifying the center position of the FOV, it sets the scanning range to be displayed on the monitor along with the image of the subject.

[0236] (Postscript 13)

[0237] Alternatively, when the set scanning range does not meet the minimum FOV size that should be ensured based on the size of the FOV according to the operation input, the setting unit expands at least one of the first boundary line and the second boundary line while maintaining the center position of the FOV, thereby setting the scanning range displayed on the monitor together with the subject image in a manner that meets the size of the FOV.

[0238] (Postscript 14)

[0239] Alternatively, the input unit may accept operational input specifying the minimum FOV size that should be ensured based on previous examination information of the same subject.

[0240] When the set scanning range does not meet the minimum scanning range, the setting unit expands at least one of the first boundary line and the second boundary line while maintaining the center position of the FOV, thereby setting the scanning range displayed on the monitor together with the subject image in a manner that meets the minimum FOV size.

[0241] (Postscript 15)

[0242] Alternatively, the input unit may accept the specification of the maximum magnification of the FOV.

[0243] When the set scanning range does not meet the maximum magnification, the setting unit reduces at least one of the first boundary line and the second boundary line while maintaining the center position of the FOV, thereby setting the scanning range displayed on the monitor together with the subject image in a manner that meets the maximum magnification.

[0244] (Postscript 16)

[0245] Alternatively, it may also include: a platform for performing X-ray CT imaging on the subject.

[0246] The output unit outputs a virtual scan range that simulates the scan range, so that it can be overlaid on the monitor onto the image obtained by low-dose CT imaging via the stage.

[0247] The operation input is the operation input for the display of the virtual scan range.

[0248] (Postscript 17)

[0249] Alternatively, it may also include: an optical camera for photographing the subject.

[0250] The output unit outputs a virtual scan range that simulates the scan range, so as to overlay and display it on the monitor on the image obtained by the optical camera.

[0251] The operation input is the operation input for the display of the virtual scan range.

[0252] (Postscript 18)

[0253] Alternatively, the output unit may output the determined boundary line so that the boundary line is highlighted within the scan range on the monitor.

[0254] (Postscript 19)

[0255] A method for setting a scanning range, comprising:

[0256] The image of the subject obtained by photographing the subject is analyzed to obtain a first boundary line and a second boundary line, which are used to delineate the scanning range for obtaining the medical image of the subject.

[0257] Obtain fixed scanning range information for the photograph of the subject.

[0258] Based on either the first boundary line or the second boundary line, and the obtained fixed scan range information, the scan range is set.

[0259] Output the set scan range so that it can be displayed on the monitor.

Claims

1. A medical image diagnostic device, comprising: The analysis unit uses an automatic planning function to analyze the image of the subject obtained by taking a photograph of the subject, thereby obtaining a first boundary line and a second boundary line, which are used to delineate the scanning range of the scan for obtaining the medical image of the subject; The acquisition unit obtains fixed scanning range information about the subject's imaging using a method different from that used in the automatic planning function; The setting unit sets the scanning range based on one of the first boundary line and the second boundary line obtained by the analysis unit, and the obtained fixed scanning range information; and The output unit outputs the scan range set by the setting unit for display on a monitor. The acquisition unit acquires the image of the subject. The output unit sets at least one boundary line related to the scanning range for each photographic part on the human body image corresponding to the human body model, and displays a graphical interface on the monitor. This graphical interface is used to set whether to perform the determination of the boundary line of the scanning range based on the analytical processing of the subject image. When the determination is set to be performed, the analysis unit performs the analysis process based on the boundary lines set on the human body image, the human body model, and the subject image, thereby determining at least one boundary line of the scanning range for scanning the photographic area of ​​the subject. The output unit displays the scan range based on the determined boundary line on the monitor along with the image of the subject.

2. The medical image diagnostic device as described in claim 1, wherein, The human body model represents the 3D positional relationship of anatomical feature points in the body. The analytical unit Extract anatomical feature points from the image of the subject. The 3D positional relationship of anatomical feature points in the human body model is compared with the extracted feature points to detect the photographic areas in the subject image. Based on the detected imaging region and at least one boundary line on the human image related to the scanning range, at least one boundary line of the scanning range for scanning the imaging region of the subject is determined. The setting unit sets the scanning range that is displayed on the monitor together with the image of the subject, based on the determined boundary line.

3. The medical image diagnostic device as described in claim 2, wherein, The at least one boundary line defined on the human body image has: a first boundary line indicating one of the start and end positions of the photograph within the scanning range of the human body image, and a second boundary line indicating the other of the start and end positions. The medical image diagnostic device also features: The input unit accepts operation inputs for specifying only one of the first boundary line and the second boundary line. When the set scan range does not meet the minimum scan range that should be ensured as a scan range based on the operation input, the setting unit expands the other while maintaining one of the start position and the end position, thereby satisfying the minimum scan range, and sets the scan range that is displayed on the monitor together with the subject image.

4. The medical image diagnostic device as described in claim 2, wherein, The at least one boundary line defined on the human body image has: a first boundary line indicating one of the start and end positions of the photograph within the scanning range of the human body image, and a second boundary line indicating the other of the start and end positions. The medical image diagnostic device also features: The input unit accepts operation inputs specifying which of the first boundary line and the second boundary line should be prioritized for maintenance when setting the scanning range on the human body image. The setting unit expands one of the start position and the end position specified by the operation input while maintaining the other, thereby setting the scan range displayed on the monitor together with the subject image in a manner that satisfies the minimum scan range that should be ensured as the scan range based on the operation input.

5. The medical image diagnostic device as described in claim 2, wherein, The setting unit specifies the minimum scanning range that should be ensured as the scanning range on the human body image based on previous examination information of the same subject. When the set scanning range does not meet the minimum scanning range, the setting unit expands the other side while maintaining one of the start and end positions of the imaging in the scanning range on the human body image, thereby satisfying the minimum scanning range. The setting unit displays the scanning range on the monitor together with the subject image.

6. The medical image diagnostic device as described in claim 2, wherein, The at least one boundary line defined on the human body image has: a first boundary line indicating one of the start and end positions of the photograph within the scanning range of the human body image, and a second boundary line indicating the other of the start and end positions. The medical image diagnostic device also features: The input unit accepts operation inputs for specifying the location of the imaging center within the scanning range of the human body image. The acquisition unit also acquires fixed scanning range information related to scanning modes that do not involve movement of the examination bed. The setting unit sets the scanning range displayed on the monitor together with the subject image based on one of the first boundary line and the second boundary line obtained corresponding to the imaging center position, and the fixed scanning range information.

7. The medical image diagnostic device as described in claim 6, wherein, When the set scanning range does not meet the minimum scanning range that should be ensured as a scanning range based on the operation input, the setting unit expands at least one of the first boundary line and the second boundary line while maintaining the imaging center position, thereby setting the scanning range displayed on the monitor together with the subject image in a manner that satisfies the minimum scanning range.

8. The medical image diagnostic device as described in claim 6, wherein, The setting unit specifies a minimum scanning range that should be ensured as the scanning range on the human body image based on previous examination information of the same subject. When the set scanning range does not meet the minimum scanning range, at least one of the first boundary line and the second boundary line is expanded while maintaining the position of the imaging center, so as to meet the minimum scanning range, and the scanning range displayed on the monitor together with the subject image is set.

9. The medical image diagnostic device as claimed in claim 7 or claim 8, wherein, The input unit accepts operation inputs for specifying that the imaging center position should be maintained first when setting the scanning range. While maintaining the position of the imaging center, the setting unit expands at least one of the first boundary line and the second boundary line, thereby setting the specified scanning range that satisfies the minimum scanning range.

10. The medical image diagnostic device as described in claim 2, wherein, The at least one boundary line defined on the human body image has: a first boundary line indicating one of the start and end positions of the photograph within the scanning range of the human body image, and a second boundary line indicating the other of the start and end positions. The first boundary line and the second boundary line define the size of the field of view (FOV) within the scanning range. The medical image diagnostic device also features: The input unit accepts operation inputs for specifying the size of the field of view (FOV). When the setting unit receives the operation input, it sets the scanning range to be displayed on the monitor along with the image of the subject.

11. The medical image diagnostic device as claimed in claim 10, wherein, The input unit accepts operation inputs for specifying the center position of the field of view (FOV). When the setting unit receives an operation input specifying the center position of the field of view (FOV), it sets the scanning range to be displayed on the monitor along with the image of the subject.

12. The medical image diagnostic device as claimed in claim 11, wherein, When the set scanning range does not meet the minimum field of view (FOV) size that should be ensured based on the size of the field of view (FOV) based on the operation input, the setting unit expands at least one of the first boundary line and the second boundary line while maintaining the center position of the FOV, thereby setting the scanning range displayed on the monitor together with the subject image in a manner that satisfies the size of the FOV.

13. The medical image diagnostic device as described in claim 10, wherein, The input unit accepts operation inputs specifying the minimum field of view (FOV) size that should be ensured based on previous examination information of the same subject. When the set scanning range does not meet the minimum field of view (FOV) size, the setting unit expands at least one of the first boundary line and the second boundary line while maintaining the center position of the FOV, thereby setting the scanning range displayed on the monitor together with the subject image in a manner that meets the minimum FOV size.

14. The medical image diagnostic device as claimed in claim 11, wherein, The input unit accepts the specification of the maximum magnification of the field of view (FOV). When the set scanning range does not meet the maximum magnification, the setting unit reduces at least one of the first boundary line and the second boundary line while maintaining the center position of the field of view (FOV) to meet the maximum magnification, thereby setting the scanning range displayed on the monitor together with the subject image.

15. The medical image diagnostic device as described in claim 3, wherein, It also has: A radiographic testing platform was set up to perform X-ray CT imaging on the subject. The output unit outputs a virtual scan range that simulates the scan range, so that it can be overlaid on the monitor onto the image obtained by low-dose CT imaging via the stage. The operation input is the operation input for the display of the virtual scan range.

16. The medical image diagnostic device as described in claim 3, wherein, It also has: An optical camera is used to photograph the subject. The output unit outputs a virtual scan range that simulates the scan range, so as to overlay and display it on the monitor on the image obtained by the optical camera. The operation input is the operation input for the display of the virtual scan range.

17. The medical image diagnostic device according to any one of claims 1 to 8, 10 to 12, wherein, The output unit outputs the determined boundary line so that the boundary line is highlighted within the scan range on the monitor.

18. A method for setting a scanning range, wherein, include: The analysis step involves using an automatic planning function to analyze the image of the subject obtained by photographing the subject, thereby obtaining a first boundary line and a second boundary line. The first boundary line and the second boundary line are used to delineate the scanning range for obtaining the medical image of the subject. The acquisition step involves obtaining fixed scan range information about the subject's imaging using a method different from that used in the automatic planning function; The setting step involves setting the scanning range based on either the first boundary line or the second boundary line, and the obtained fixed scanning range information. as well as The output step outputs the set scan range for display on the monitor. In the acquisition step, the image of the subject is acquired. In the output step, at least one boundary line related to the scanning range is set on the human body image corresponding to the human body model for each photographic part. Furthermore, a graphical interface is displayed on the monitor, which is used to set whether to perform the determination of the boundary line of the scanning range based on the analytical processing of the subject image. In the analysis step, when the determination is set to be performed, the analysis process is performed based on the boundary lines defined on the human body image, the human body model, and the subject image, thereby determining at least one boundary line of the scanning range for scanning the photographic area of ​​the subject. In the output step, the scan range based on the determined boundary line is displayed on the monitor along with the subject image.

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