Medical image processing device and medical image diagnostic system

Abstract

To provide notification of a part that is more likely to have been polluted.SOLUTION: A medical image processor according to an embodiment comprises a reception part, an estimation part, and a notification part. The reception part receives an image taken by an imaging apparatus, the imaging field of which includes a medical diagnostic imaging apparatus. The estimation part estimates the degree of pollution of each part of the medical diagnostic imaging apparatus on the basis of the image. The notification part provides notification of the degree of pollution of each part of the medical diagnostic imaging apparatus.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The embodiments disclosed in this specification and the drawings relate to a medical image processing apparatus and a medical image diagnostic system.

[0002] Conventionally, it is necessary to reduce the risk of infection with an infectious disease via a medical image diagnostic device. In order to reduce the risk of infection with an infectious disease, medical staff must clean the medical image diagnostic device appropriately. Patent Document 1 discloses a technology for predicting the survival state of bacteria when a medicine is sprayed. However, Patent Document 1 does not disclose a technology for notifying a part that is highly likely to be contaminated by a virus, bacteria, or the like when the medical image diagnostic device is actually used.

[0003] If medical staff do not know which areas are likely to be contaminated by viruses, bacteria, etc., they will not be able to identify the areas that need to be cleaned with priority, and will be unable to clean efficiently. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2019 / 044254 Summary of the Invention [Problem to be solved by the invention]

[0005] One of the problems to be solved by the embodiments disclosed in this specification and the drawings is to notify a part that is highly likely to be contaminated. However, the problems to be solved by the embodiments disclosed in this specification and the drawings are not limited to the above problem. Problems corresponding to the effects of each configuration shown in the embodiments described later can also be positioned as other problems. [Means for solving the problem]

[0006] A medical image processing apparatus according to an embodiment includes a receiving unit, an estimating unit, and a notifying unit. The receiving unit receives an image captured by an imaging device that includes the medical image diagnostic device in its imaging field of view. The estimating unit determines, based on the image, The above Medical imaging diagnostic equipment The part that the user touches The notification unit estimates the degree of contamination of the medical image diagnostic device. The part The degree of contamination is by at least one of the display unit and the projector Notify. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram illustrating an example of the configuration of a cleaning support system according to a first embodiment. [Diagram 2] FIG. 2 is a block diagram illustrating an example of the configuration of the X-ray CT apparatus according to the first embodiment. [Diagram 3] FIG. 3 is a diagram showing an example of a contamination level notification screen displayed by the X-ray CT apparatus according to the first embodiment. [Figure 4] FIG. 4 is a diagram showing an example of the second contamination level image projected by the X-ray CT apparatus according to the first embodiment. [Diagram 5] FIG. 5 is a flowchart showing an example of a contamination level notification process executed by the X-ray CT apparatus according to the first embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, a medical image processing apparatus and a medical image diagnostic system according to the present embodiment will be described with reference to the drawings. In the following embodiments, parts with the same reference numerals perform similar operations, and duplicated descriptions will be omitted as appropriate.

[0009] (First embodiment) FIG. 1 is a diagram showing an example of the configuration of a cleaning support system 1000 according to a first embodiment. The cleaning support system 1000 has an X-ray CT (Computed Tomography) device 1, a camera 2, and a projector 3. The X-ray CT device 1, the camera 2, and the projector 3 are connected to each other via a network 4 such as an in-hospital LAN (Local Area Network). The cleaning support system 1000 shown in FIG. 1 has one camera 2 and one projector 3. However, the cleaning support system 1000 may have a plurality of cameras 2. The cleaning support system 1000 may also have a plurality of projectors 3.

[0010] The X-ray CT apparatus 1 is an apparatus that collects medical image data by capturing an image of a subject P (see FIG. 2). The X-ray CT apparatus 1 is an example of a medical image diagnostic apparatus.

[0011] The camera 2 includes the X-ray CT device 1 in its field of view. The camera 2 is an example of an imaging device. The camera 2 is a device that captures moving images or periodic still images. More specifically, the camera 2 captures images of the subject P imaged by the X-ray CT device 1 and users such as medical staff operating the X-ray CT device 1. Furthermore, the camera 2 captures images of users who touch the X-ray CT device 1 and users who clean the X-ray CT device 1. The camera 2 then transmits the captured images to the X-ray CT device 1.

[0012] The projector 3 projects various images onto the X-ray CT apparatus 1. For example, the projector 3 projects an image onto a contaminated portion of the X-ray CT apparatus 1 based on a request from the X-ray CT apparatus 1.

[0013] Next, the X-ray CT apparatus 1 will be described.

[0014] 2 is a block diagram showing an example of the configuration of the X-ray CT apparatus 1 according to the first embodiment. As shown in FIG. 2, the X-ray CT apparatus 1 according to the present embodiment includes a gantry device 10, a bed device 30, and a console device 40.

[0015] In Fig. 2, the rotation axis of the rotating frame 13 in a non-tilted state or the longitudinal direction of the top plate 33 of the bed device 30 is defined as the Z-axis direction. The axial direction that is perpendicular to the Z-axis direction and horizontal to the floor surface is defined as the X-axis direction. The axial direction that is perpendicular to the Z-axis direction and perpendicular to the floor surface is defined as the Y-axis direction. For the sake of explanation, Fig. 2 illustrates the gantry device 10 from multiple directions, and shows a case in which the X-ray CT device 1 has one gantry device 10.

[0016] The gantry device 10 is an apparatus serving as an imaging system for scanning the subject P with X-rays. The gantry device 10 has a cylindrical opening into which the subject P is inserted. The gantry device 10 also has an X-ray tube 11, a wedge 16, a collimator 17, an X-ray detector 12, an X-ray high voltage device 14, a DAS (Data Acquisition System) 18, a rotating frame 13, a control device 15, a first operation panel 19a, a second operation panel 19b, a sterilization device 20, and a bed device 30.

[0017] The X-ray tube 11 is a vacuum tube that irradiates thermoelectrons from a cathode (filament) to an anode (target) by application of a high voltage from an X-ray high voltage device 14.

[0018] The wedge 16 is a filter for adjusting the amount of X-rays irradiated from the X-ray tube 11. Specifically, the wedge 16 is a filter that transmits and attenuates the X-rays irradiated from the X-ray tube 11 so that the X-rays irradiated from the X-ray tube 11 to the subject P have a predetermined distribution.

[0019] The wedge 16 is, for example, a wedge filter or a bow-tie filter, which is a filter made by processing aluminum so as to have a predetermined target angle and a predetermined thickness.

[0020] The collimator 17 is a lead plate or the like for narrowing down the irradiation range of the X-rays transmitted through the wedge 16, and a slit is formed by combining a plurality of lead plates or the like.

[0021] The X-ray detector 12 detects X-rays irradiated from the X-ray tube 11 and passing through the subject P, and outputs an electrical signal corresponding to the X-ray dose to a data acquisition device (DAS 18). The X-ray detector 12 has, for example, a plurality of X-ray detection element rows in which a plurality of X-ray detection elements are arranged in the channel direction along one arc centered on the focal point of the X-ray tube 11. The X-ray detector 12 has, for example, a plurality of X-ray detection element rows in which a plurality of X-ray detection elements are arranged in the channel direction along one arc centered on the focal point of the X-ray tube 11. The X-ray detector 12 has, for example, a structure in which a plurality of X-ray detection element rows in which a plurality of X-ray detection elements are arranged in the channel direction are arranged in the slice direction (also called the body axis direction or row direction).

[0022] Moreover, the X-ray detector 12 is an indirect conversion type detector having, for example, a grid, a scintillator array, and an optical sensor array. The scintillator array has a plurality of scintillators, and the scintillator has a scintillator crystal that outputs light with a photon amount corresponding to the amount of incident X-rays. The grid is disposed on the X-ray incident side of the scintillator array, and has an X-ray shielding plate having a function of absorbing scattered X-rays. The optical sensor array has a function of converting into an electric signal corresponding to the amount of light from the scintillator, and has, for example, an optical sensor such as a photomultiplier tube (PMT). The X-ray detector 12 may be a direct conversion type detector having a semiconductor element that converts the incident X-rays into an electric signal.

[0023] X-ray high voltage device 14 has electric circuits such as a transformer and a rectifier, and includes a high voltage generator having a function of generating a high voltage to be applied to X-ray tube 11, and an X-ray control device that controls the output voltage according to the X-rays irradiated by X-ray tube 11. The high voltage generator may be of a transformer type or an inverter type. X-ray high voltage device 14 may be provided on rotating frame 13, or may be provided on the fixed frame (not shown) side of gantry device 10. The fixed frame is a frame that rotatably supports rotating frame 13.

[0024] The DAS 18 has an amplifier that performs an amplification process on the electric signals output from each X-ray detection element of the X-ray detector 12, and an A / D converter that converts the electric signals into digital signals, and generates detection data. The detection data generated by the DAS 18 is transferred to the console device 40. The X-ray tube 11, the X-ray detector 12, and the DAS 18 are, for example, an example of a scan execution unit. That is, the X-ray tube 11, the X-ray detector 12, and the DAS 18 irradiate the subject P with X-rays, detect the X-rays that have passed through the subject P, and obtain projection data.

[0025] The rotating frame 13 is an annular frame that supports the X-ray tube 11 and the X-ray detector 12 facing each other and rotates the X-ray tube 11 and the X-ray detector 12 by the control device 15. The rotating frame 13 may further support the X-ray high voltage device 14 and the DAS 18 in addition to the X-ray tube 11 and the X-ray detector 12. The detection data acquired by the DAS 18 is transmitted, for example, by optical communication from a transmitter 21 having a light-emitting diode provided on the rotating frame 13 to a receiver 22 having a photodiode provided on a non-rotating part of the gantry 10 such as a fixed frame, and then transferred to the console device 40. The method of transmitting the detection data from the rotating frame 13 to the non-rotating part of the gantry 10 is not limited to optical communication, and other non-contact data transmission methods may be used.

[0026] The control device 15 has a processing circuit having a CPU and the like, and a driving mechanism such as a motor and an actuator. The control device 15 has a function of receiving an input signal from an input interface 43 attached to the console device 40 or an input interface attached to the gantry device 10, and controlling the operation of the gantry device 10 and the bed device 30. In addition, the control device 15 receives an input signal and controls the rotation of the rotating frame 13 and the operation of the gantry device 10 and the bed device 30.

[0027] For example, the control device 15 tilts the gantry 10 by rotating the rotating frame 13 around an axis parallel to the X-axis direction based on inclination angle (tilt angle) information input through an input interface attached to the gantry 10.

[0028] First operation panel 19a has, for example, a touch panel display. More specifically, when a displayed image is touched, first operation panel 19a accepts an operation corresponding to the touched image. First operation panel 19a may also have an operation button.

[0029] Second operation panel 19b has, for example, a touch panel display. When a displayed image is touched, second operation panel 19b accepts an operation corresponding to the touched image. Second operation panel 19b may also have an operation button.

[0030] The sterilization device 20 is disposed inside a cylindrical opening in the X-ray CT scanner 1, into which the subject P is inserted. The sterilization device 20 irradiates light capable of sterilization from inside the X-ray CT scanner 1 toward the center of the opening. For example, the sterilization device 20 is a light source that irradiates light such as ultraviolet light. Note that the sterilization device 20 may be disposed in other parts, not limited to the cylindrical opening into which the subject P is inserted.

[0031] The bed device 30 is a device on which the subject P to be scanned is placed and moved, and includes a base 31, a bed driving device 32, a top plate 33, and a support frame 34. The base 31 is a housing that supports the support frame 34 so that it can move in the vertical direction. The bed driving device 32 is a motor or actuator that moves the top plate 33 on which the subject P is placed in its longitudinal direction (Z-axis direction in FIG. 2). The top plate 33 provided on the upper surface of the support frame 34 is a plate on which the subject P is placed. In other words, the bed device 30 has the top plate 33 on which the subject P is placed. Note that the bed driving device 32 may move the support frame 34 in the longitudinal direction of the top plate 33 in addition to the top plate 33.

[0032] The bed driving device 32 moves the base 31 in the vertical direction in accordance with a control signal from the control device 15. The bed driving device 32 moves the tabletop 33 in the longitudinal direction in accordance with a control signal from the control device 15.

[0033] The console device 40 is a device that accepts operations of the X-ray CT apparatus 1 by a user and reconstructs X-ray CT image data from detection data collected by the gantry device 10. The console device 40 includes a memory 41, a display 42, an input interface 43, and a processing circuit 44.

[0034] The memory 41 is realized by, for example, a semiconductor memory element such as a RAM (Random Access Memory), a flash memory, a hard disk, an optical disk, etc. The memory 41 stores, for example, projection data and reconstructed image data.

[0035] The memory 41 also stores dedicated programs for realizing an operation control function 440, a preprocessing function 441, a reconstruction processing function 442, a receiving function 443, a behavior determination function 444, a sterilization function 445, a contamination level estimation function 446, a cleaning order determination function 447, and a notification function 448, which will be described later.

[0036] The display 42 is a monitor referred to by the user and displays various types of information. For example, the display 42 outputs medical images (CT images) generated by the processing circuitry 44, a GUI (Graphical User Interface) for receiving various operations from the user, and the like. For example, the display 42 is a liquid crystal display or a CRT (Cathode Ray Tube) display.

[0037] The input interface 43 accepts various input operations from a user, converts the accepted input operations into electrical signals, and outputs the electrical signals to the processing circuitry 44. For example, the input interface 43 accepts from the user acquisition conditions for acquiring projection data, reconstruction conditions for reconstructing a CT image, image processing conditions for generating a post-processed image from the CT image, and the like. Also, for example, the input interface 43 is realized by a mouse, a keyboard, a trackball, a switch, a button, a joystick, or the like.

[0038] The processing circuitry 44 controls the operation of the entire X-ray CT device 1. The processing circuitry 44 has, for example, an operation control function 440, a pre-processing function 441, a reconstruction processing function 442, a reception function 443, a behavior determination function 444, a sterilization function 445, a contamination level estimation function 446, a cleaning order determination function 447, and a notification function 448. In the embodiment, each processing function performed by the components of the operation control function 440, the pre-processing function 441, the reconstruction processing function 442, the reception function 443, the behavior determination function 444, the sterilization function 445, the contamination level estimation function 446, the cleaning order determination function 447, and the notification function 448 is stored in the memory 41 in the form of a program executable by a computer. The processing circuitry 44 is a processor that realizes a function corresponding to each program by reading and executing the program from the memory 41. In other words, the processing circuitry 44 in a state in which each program has been read has each function shown in the processing circuitry 44 in FIG. 2.

[0039] 2, the operation control function 440, the preprocessing function 441, the reconstruction processing function 442, the reception function 443, the behavior determination function 444, the sterilization function 445, the contamination level estimation function 446, the cleaning order determination function 447, and the notification function 448 are realized by a single processor, but the processing circuit 44 may be configured by combining multiple independent processors and each processor may execute a program to realize the function. Also, in FIG. 2, the single storage circuit such as the memory 41 stores the programs corresponding to the processing functions, but the processing circuit 44 may be configured by distributing multiple storage circuits and reading out the corresponding programs from the individual storage circuits.

[0040] The term "processor" used in the above description refers to a circuit such as a CPU (Central Processing Unit), a GPU (Graphical Processing Unit), an Application Specific Integrated Circuit (ASIC), a programmable logic device (e.g., a Simple Programmable Logic Device (SPLD), a Complex Programmable Logic Device (CPLD), and a Field Programmable Gate Array (FPGA)). The processor achieves its function by reading and executing a program stored in memory 41. Note that instead of storing a program in memory 41, the processor may be configured to directly incorporate the program into its circuit. In this case, the processor achieves its function by reading and executing the program incorporated in the circuit.

[0041] The operation control function 440 controls various functions of the processing circuitry 44 based on an input operation received from a user via the input interface 43. For example, the operation control function 440 receives input of user information (e.g., a user ID, etc.) for login, subject information, imaging protocol, etc. via the input interface 43. In addition, the processing circuitry 44 uses the operation control function 440 to perform control related to positioning imaging, main imaging, etc.

[0042] The pre-processing function 441 generates data by performing pre-processing such as logarithmic conversion processing, offset processing, sensitivity correction processing between channels, and beam hardening correction on the detection data output from the DAS 18. Note that the data before pre-processing (detection data) and the data after pre-processing may be collectively referred to as projection data.

[0043] The reconstruction processing function 442 performs reconstruction processing using a filtered back projection method, an iterative reconstruction method, or the like on the projection data generated by the preprocessing function 441 in accordance with the reconstruction conditions to generate CT image data.

[0044] The reconstruction processing function 442 converts the reconstructed CT image data into tomographic image data of an arbitrary cross section or three-dimensional image data by a known method based on an input operation received from a user via the input interface 43 .

[0045] The receiving function 443 receives an image captured by the camera 2 that includes the X-ray CT device 1 in its field of view. The receiving function 443 is an example of a receiving unit. That is, the receiving function 443 receives an image captured by the camera 2 of a user who uses the X-ray CT device 1.

[0046] Furthermore, the receiving function 443 receives examination information indicating the contents of an examination to be performed on the subject P by the X-ray CT device 1. The examination information is information indicating the contents of an examination to be performed on the subject P. For example, the examination information is examination order information requesting an examination on the subject P by the X-ray CT device 1. Furthermore, the examination information is not limited to examination order information, and may be imaging information generated based on the examination order information. The imaging information is information indicating the imaging conditions (tube voltage, tube current) of the X-ray CT device 1, the imaging part (diagnostic part), the imaging technique (presence or absence of contrast agent, etc.), the patient's posture during imaging, etc.

[0047] The behavior determination function 444 determines the behavior of the user of the X-ray CT device 1. That is, the behavior determination function 444 determines whether or not the user is cleaning the X-ray CT device 1. For example, the user is the subject P of the X-ray CT device 1, the medical staff who operates the X-ray CT device 1, or the medical staff who cleans the X-ray CT device 1. That is, the behavior determination function 444 determines whether the user, such as the subject P of the X-ray CT device 1 or the medical staff who operates the X-ray CT device 1, is touching the X-ray CT device 1 or cleaning the X-ray CT device 1.

[0048] For example, the behavior determination function 444 determines the behavior of the user based on the image received by the receiving function 443. That is, the behavior determination function 444 determines whether or not the user is in contact with the X-ray CT device 1 based on the image received by the receiving function 443. When it is determined that the user is in contact, the behavior determination function 444 specifies the part of the X-ray CT device 1 that is in contact and the time of the contact.

[0049] Furthermore, the behavior determination function 444 determines whether or not the user has cleaned the X-ray CT device 1 based on the image received by the receiving function 443. The behavior determination function 444 is an example of a determination unit. When it is determined that cleaning has been performed, the behavior determination function 444 specifies the part of the X-ray CT device 1 that has been cleaned and the time of cleaning.

[0050] Furthermore, instead of image determination, the behavior determination function 444 may determine whether the user is in contact with the X-ray CT device 1 or whether the user is cleaning the X-ray CT device 1 based on the mode. That is, the behavior determination function 444 determines whether cleaning is being performed based on the image received by the receiving function 443 and the mode. The modes include an imaging mode and a cleaning mode. The imaging mode is a mode that is set when the X-ray CT device 1 images the subject P. The cleaning mode is a mode that is set when the X-ray CT device 1 does not image the subject P.

[0051] More specifically, the behavior determination function 444 sets the mode based on, for example, an operation received by the input interface 43, an operation received by the first operation panel 19a, or an operation received by the second operation panel 19b. That is, the behavior determination function 444 sets the mode to a cleaning mode indicating that cleaning is in progress. Alternatively, the behavior determination function 444 sets the mode to an imaging mode indicating that the subject P is in a state to be imaged. The behavior determination function 444 is an example of a setting unit.

[0052] Here, when the X-ray CT apparatus 1 is in an imaging mode for imaging the subject P, the medical staff does not clean the X-ray CT apparatus 1. That is, in the imaging mode, the behavior determination function 444 determines that it is a simple contact.

[0053] Therefore, in the imaging mode, the behavior determination function 444 does not distinguish between contact due to cleaning such as wiping or simple contact. That is, when the behavior determination function 444 determines that the user has touched the X-ray CT device 1 based on the image received by the receiving function 443, it determines that it has been simple contact. Furthermore, when it determines that there has been contact, the behavior determination function 444 identifies the part of the X-ray CT device 1 that has been touched and the time of contact.

[0054] On the other hand, in the cleaning mode, the medical staff cleans the X-ray CT device 1. Therefore, when the behavior determination function 444 determines that the user is in contact with the X-ray CT device 1 based on the image received by the receiving function 443, the behavior determination function 444 determines that the contact is for cleaning. In other words, when the behavior determination function 444 determines that the user is in contact with the X-ray CT device 1 based on the image received by the receiving function 443, the behavior determination function 444 determines that the contact is for cleaning such as wiping. Furthermore, when the behavior determination function 444 determines that cleaning is being performed, it specifies the part of the X-ray CT device 1 that has been cleaned and the time when the cleaning was performed.

[0055] The sterilization function 445 controls the sterilization apparatus 20. More specifically, in the imaging mode, the sterilization function 445 does not allow the sterilization apparatus 20 to perform sterilization since there is a possibility of adversely affecting the subject P being imaged by the X-ray CT apparatus 1. On the other hand, the sterilization function 445 operates the sterilization apparatus 20 when the X-ray CT apparatus 1 is not performing imaging. That is, when the subject P is not placed on the top plate 33 of the X-ray CT apparatus 1, the sterilization function 445 operates the sterilization apparatus 20 since there is no possibility of adversely affecting the subject P. That is, the sterilization function 445 causes the sterilization apparatus 20 to irradiate ultraviolet light.

[0056] Here, the gantry device 10 has a cylindrical opening into which the subject P is inserted. The sterilization device 20 is disposed facing the cylindrical opening into which the subject P is inserted. Therefore, the sterilization function 445 causes the sterilization device 20 to irradiate ultraviolet light toward the opening.

[0057] Furthermore, the sterilization function 445 may cause the sterilization device 20 to irradiate ultraviolet rays when the top plate 33 is inserted into a cylindrical opening into which the subject P is inserted in the X-ray CT apparatus 1. This allows the sterilization function 445 to irradiate the top plate 33 with ultraviolet rays, thereby sterilizing the top plate 33.

[0058] Furthermore, the sterilization function 445 may cause the sterilization apparatus 20 to perform sterilization based on the contamination level of each part of the X-ray CT scanner 1. More specifically, the sterilization function 445 transmits the contamination level of each part of the X-ray CT scanner 1 estimated by a contamination level estimation function 446 described below to the sterilization apparatus 20. Then, the sterilization function 445 causes the sterilization apparatus 20 to perform sterilization of the parts of the X-ray CT scanner 1 where the contamination level is higher than a threshold value. In this way, the sterilization function 445 can cause the sterilization apparatus 20 to perform sterilization of the contaminated parts.

[0059] The contamination degree estimation function 446 estimates the contamination degree of each part of the X-ray CT device 1 based on the image received by the receiving function 443. The contamination degree estimation function 446 is an example of an estimation unit. The contamination degree is information that quantifies the degree of contamination estimated by viruses, bacteria, etc. Then, the contamination degree estimation function 446 sets the contamination degree for each part of the X-ray CT device 1 in the contamination degree estimation information. The contamination degree estimation information is information in which the contamination degree of each part of the X-ray CT device 1 is set. Note that the contamination degree estimation information may be set for each part of the X-ray CT device 1, or may be set for each coordinate indicating the position of the X-ray CT device 1. In other words, the contamination degree estimation information is a cleaning map showing parts to be cleaned in the X-ray CT device 1. Or, the contamination degree estimation information is an uncleaned map showing parts not cleaned in the X-ray CT device 1. Or, the contamination degree estimation information is a cleaning map showing parts to be cleaned in the X-ray CT device 1. Alternatively, the contamination level estimation information is a sterilization map indicating the parts of the X-ray CT scanner 1 that should be sterilized.

[0060] The contamination level estimation function 446 increases the contamination level of the contacted portion based on the amount of contact by the user with the X-ray CT device 1. The amount of contact refers to the number of times the user has contacted the X-ray CT device 1 and the duration of contact. More specifically, when the behavior determination function 444 determines that contact has occurred, the contamination level estimation function 446 increases the contamination level of the contacted portion in the contamination level estimation information. The contamination level estimation function 446 also determines the value by which the contamination level is to be increased depending on the duration of contact. Specifically, the contamination level estimation function 446 increases the value by which it increases as the duration of contact becomes longer.

[0061] On the other hand, the contamination level estimation function 446 reduces the contamination level of the cleaned portion based on the amount of cleaning performed on the X-ray CT scanner 1. The amount of cleaning refers to the number of times each portion of the X-ray CT scanner 1 has been cleaned and the cleaning time. More specifically, when the behavior determination function 444 determines that cleaning has been performed, the contamination level estimation function 446 reduces the contamination level of the cleaned portion in the contamination level estimation information. Furthermore, the contamination level estimation function 446 determines the value by which the contamination level is reduced depending on the cleaning time. Specifically, the contamination level estimation function 446 increases the value by which the contamination level is reduced as the cleaning time increases.

[0062] Furthermore, the contamination level estimation function 446 may estimate the contamination level in consideration of other factors, not limited to the determination result by the behavior determination function 444. For example, the contamination level estimation function 446 may estimate the contamination level based on the image received by the receiving function 443 and the examination information. Here, the examination information indicates the contents of the examination by the X-ray CT device 1. The subject P is placed on the top board 33 in a posture according to the examination contents. For example, the subject P takes various postures, such as lying on his back, lying on his stomach, or stretching his arms, depending on the examination contents.

[0063] The contaminated portion of the X-ray CT device 1 is specified by the posture of the subject P. For example, when the subject P lies on his / her back, the cylindrical opening of the gantry device 10 is more contaminated, when the subject P lies face down, the portion of the top board 33 facing the mouth of the subject P is more contaminated, and when the subject P lies with his / her hands outstretched, the portion in contact with the hands is more contaminated. Therefore, the contamination degree estimation function 446 estimates the contamination degree based on the image received by the receiving function 443 and the posture of the subject P specified by the examination information. Then, the contamination degree estimation function 446 sets the contamination degree for the estimated portion in the contamination degree estimation information.

[0064] Furthermore, when setting the contamination degree based on the posture of the subject P, the method of setting the contamination degree is not limited. For example, the contamination degree estimation function 446 sets the contamination degree estimation information to an initial value for a portion estimated to be contaminated due to the posture of the subject P specified by the examination information. Alternatively, the contamination degree estimation function 446 increases the rate of increase in the contamination degree per unit time for a portion estimated to be contaminated due to the posture of the subject P specified by the examination information. Thereby, when the estimated portion is contacted, the contamination degree estimation function 446 sets the contamination degree estimation information to a greater contamination degree than that for a non-estimated portion.

[0065] Furthermore, the contamination level estimation function 446 reduces the contamination level of the portion sterilized by the sterilization apparatus 20 based on the operating status of the sterilization apparatus 20 that sterilizes the X-ray CT scanner 1. More specifically, the contamination level estimation function 446 identifies a portion of the X-ray CT scanner 1 that corresponds to the location where the sterilization apparatus 20 has operated. Then, the contamination level estimation function 446 reduces the contamination level of the identified portion in the contamination level estimation information in accordance with the operating time.

[0066] The cleaning order determination function 447 determines the order of cleaning the X-ray CT device 1 based on the degree of contamination of each part of the X-ray CT device 1. The cleaning order determination function 447 is an example of a determination unit. More specifically, the cleaning order determination function 447 determines the order of cleaning the X-ray CT device 1 based on the contamination level estimation information. For example, when the cleaning order is in descending order of contamination level, the cleaning order determination function 447 arranges the parts of the X-ray CT device 1 indicated in the contamination level estimation information in descending order of contamination level.

[0067] Alternatively, when a priority is set for each part of the X-ray CT scanner 1, the cleaning order determination function 447 arranges the parts of the X-ray CT scanner 1 indicated in the contamination level estimation information in order of priority.

[0068] Alternatively, when each part of the X-ray CT scanner 1 is weighted for cleaning, the cleaning order determination function 447 arranges each part of the X-ray CT scanner 1 in an order specified by the contamination level and weight of each part in the contamination level estimation information. In this way, the cleaning order determination function 447 determines the cleaning order for the X-ray CT scanner 1.

[0069] The notification function 448 notifies the contamination level of each part of the X-ray CT device 1. The notification function 448 is an example of a notification unit. That is, the notification function 448 notifies the contamination level of each part of the X-ray CT device 1 based on the contamination level estimation information estimated by the contamination level estimation function 446. More specifically, the notification function 448 notifies by an image showing the contamination level of each part of the X-ray CT device 1. For example, the notification function 448 notifies by displaying on the first operation panel 19a or the second operation panel 19b a screen in which an image showing the contamination level is superimposed on each part of the image showing the X-ray CT device 1.

[0070] 3 is a diagram showing an example of a contamination level notification screen 100 displayed by the X-ray CT apparatus 1 according to the first embodiment. The contamination level notification screen 100 is an example of a screen in which an image showing the contamination level is superimposed on each part of an image showing the X-ray CT apparatus 1. That is, the notification function 448 displays the contamination level notification screen 100 by outputting the contamination level of each part of the X-ray CT apparatus 1 to the first operation panel 19a or the second operation panel 19b. The contamination level notification screen 100 has a message display area 110 and a contamination level estimation map 120.

[0071] The message display area 110 is a display area for displaying messages to medical staff. For example, the message display area 110 displays a message indicating that the contamination level of each part of the X-ray CT device 1 is displayed on the contamination level estimation map 120, and a method for understanding the contamination level. Specifically, the message display area 110 displays the message "Please clean areas that may be contaminated. Also, the color intensity indicates the contamination level."

[0072] The contamination level estimation map 120 is an image in which a first contamination level image 123 indicating the contamination level is superimposed on each portion of an image showing the X-ray CT scanner 1. More specifically, the contamination level estimation map 120 displays a gantry device image 121 and a bed device image 122. The gantry device image 121 is an image that imitates the gantry device 10 of the X-ray CT scanner 1. The bed device image 122 is an image that imitates the bed device 30 of the X-ray CT scanner 1. The first contamination level image 123 is superimposed on the gantry device image 121 and the bed device image 122 of the contamination level estimation map 120.

[0073] The first contamination level image 123 is an image showing the contamination level. The first contamination level image 123 is an image expressing the contamination level by shading. That is, the first contamination level image 123 indicates that the contamination level is higher as the color becomes darker. Note that the first contamination level image 123 may express the contamination level by other methods, not limited to shading. For example, the first contamination level image 123 may express the contamination level by numbers or letters, may express the contamination level by figures or marks, or may express the contamination level by other methods. Furthermore, the notification function 448 changes the display of the first contamination level image 123 when the contamination level is changed by the contamination level estimation function 446. That is, the notification function 448 changes the display of the first contamination level image 123 when the contamination level is lowered by cleaning.

[0074] The notification function 448 may change at least a part of the first contamination level image 123 indicating the contamination level in response to an operation input. When the first operation panel 19a or the second operation panel 19b receives an operation to select the first contamination level image 123 indicated in the contamination level estimation map 120 as an operation indicating a cleaned area, the notification function 448 changes the display of the first contamination level image 123 in response to the operation input. For example, when the first contamination level image 123 is selected, the notification function 448 erases the selected first contamination level image 123. That is, the notification function 448 displays the inside of the frame in the same manner as a non-contaminated area, leaving the frame of the selected first contamination level image 123. In this way, the notification function 448 notifies that the contamination level has been reduced by cleaning, although it was previously contaminated. The notification function 448 may also display in a similar manner when the contamination level estimation function 446 reduces the contamination level by cleaning, not limited to the operation input.

[0075] The notification function 448 also notifies by having the projector 3 project a second contamination level image 130 indicating the contamination level onto the X-ray CT apparatus 1. Fig. 4 is a diagram showing an example of the second contamination level image 130 projected by the X-ray CT apparatus 1 according to the first embodiment. As shown in Fig. 4, the notification function 448 causes the projector 3 to project onto each part of the gantry device 10 of the X-ray CT apparatus 1 and the bed device 39 of the X-ray CT apparatus 1 based on the contamination level estimation information.

[0076] The second contamination level image 130 is an image showing the contamination level. The second contamination level image 130 indicates that the contamination level is higher as the color becomes darker. The second contamination level image 130 may express the contamination level by other methods, not limited to shading. For example, the second contamination level image 130 may express the contamination level by numbers or letters, by figures or marks, or by other methods. That is, the notification function 448 causes the projector 3 to project the second contamination level image 130 by outputting the contamination level of each part of the X-ray CT device 1.

[0077] In this way, the user can understand the contamination state by being notified of the parts estimated to be contaminated by the first contamination level image 123 or the second contamination level image 130. For example, the user can understand the parts that have not been cleaned, the parts that need cleaning, and the parts that need sterilization.

[0078] Furthermore, the notification function 448 notifies the cleaning order of each part of the X-ray CT device 1 determined by the cleaning order determination function 447. For example, the notification function 448 notifies the cleaning order of each part of the X-ray CT device 1 by displaying it on the first operation panel 19a or the second operation panel 19b. For example, the notification function 448 displays an image in which a number indicating the cleaning order is superimposed on each part of the image of the X-ray CT device 1 on the first operation panel 19a or the second operation panel 19b. In this way, the notification function 448 notifies the cleaning order of each part of the X-ray CT device 1.

[0079] Alternatively, the notification function 448 causes the projector 3 to project a numerical value indicating the cleaning order onto each part of the X-ray CT device 1. In this way, the notification function 448 notifies the cleaning order of each part of the X-ray CT device 1. Note that when notifying the cleaning order, the notification function 448 may cause both the first operation panel 19a or the second operation panel 19b and the projector 3 to notify, or may cause only one of them to notify.

[0080] Next, a description will be given of the contamination level notification process executed by the X-ray CT apparatus 1. Fig. 5 is a flowchart showing an example of the contamination level notification process executed by the X-ray CT apparatus 1 according to the first embodiment. Note that the contamination level notification process shown in Fig. 5 determines whether the user is in contact with the X-ray CT apparatus 1 or whether the user is cleaning the X-ray CT apparatus 1 by image determination.

[0081] The receiving function 443 receives the examination information (step S1).

[0082] The receiving function 443 sets the contamination degree based on the examination information (step S2). For example, the receiving function 443 sets the contamination degree in the contamination degree estimation information as an initial value for a portion estimated to be contaminated due to the posture of the subject P identified by the examination information. Alternatively, the receiving function 443 increases the rate of increase in the contamination degree for a portion estimated to be contaminated due to the posture of the subject P identified by the examination information.

[0083] The behavior determination function 444 determines whether or not the user is in contact with the X-ray CT apparatus 1 based on the image captured by the camera 2 (step S3).

[0084] When it is determined that the user is in contact (step S3; Yes), the contamination level estimation function 446 increases the contamination level of the part in contact with the X-ray CT device 1 in the contamination level estimation information according to the contact time (step S4). Then, the X-ray CT device 1 proceeds to step S3.

[0085] If it is determined that the user is not touching the X-ray CT device 1 (step S3; No), the behavior determination function 444 determines whether the user is cleaning the X-ray CT device 1 based on the image captured by the camera 2 (step S5).

[0086] The contamination level estimation function 446 reduces the contamination level of the portion that has come into contact with the X-ray CT scanner 1 in the contamination level estimation information in accordance with the cleaning time (step S6). Then, the X-ray CT scanner 1 proceeds to step S3.

[0087] The notification function 448 judges whether or not an operation for requesting notification of the contamination level of each part of the X-ray CT device 1 has been received (step S7). If no operation has been received (step S7; No), the X-ray CT device 1 proceeds to step S3.

[0088] When the operation is accepted (step S7; Yes), the notification function 448 notifies the contamination level of each part of the X-ray CT apparatus 1 based on the contamination level estimation information (step S8).

[0089] When an operation to display the cleaning order is received, the notification function 448 notifies the user of the cleaning order (step S9).

[0090] With the above, the X-ray CT apparatus 1 ends the contamination level notification process.

[0091] As described above, the X-ray CT apparatus 1 according to the first embodiment receives an image captured by the camera 2. The X-ray CT apparatus 1 estimates the degree of contamination of each part of the X-ray CT apparatus 1 by determining whether or not a user has touched the X-ray CT apparatus 1 based on the image captured by the camera 2. The X-ray CT apparatus 1 then notifies the user of the degree of contamination of each part of the X-ray CT apparatus 1. This allows the X-ray CT apparatus 1 to notify the user of parts that are highly likely to be contaminated.

[0092] (Variation 1) In the first embodiment, the X-ray CT apparatus 1 is described as including the sterilization device 20 and the sterilization function 445. However, the X-ray CT apparatus 1 does not necessarily have to include the sterilization device 20 and the sterilization function 445.

[0093] (Variation 2) In the first embodiment, it has been described that the X-ray CT apparatus 1 includes the cleaning order determination function 447. However, the X-ray CT apparatus 1 does not have to include the cleaning order determination function 447. In other words, the notification function 448 does not have to notify the X-ray CT apparatus 1 of the cleaning order.

[0094] (Variation 3) In the first embodiment, the X-ray CT apparatus 1 has been described as including the first operation panel 19a and the second operation panel 19b. However, the X-ray CT apparatus 1 does not have to include the first operation panel 19a and the second operation panel 19b. For example, the X-ray CT apparatus 1 may notify by displaying the contamination level notification screen 100 on the display 42 of the console device 40. Alternatively, the X-ray CT apparatus 1 may notify by displaying the contamination level notification screen 100 on a device that is not shown.

[0095] (Variation 4) In the first embodiment, it has been described that the X-ray CT apparatus 1 executes notification by displaying the contamination level notification screen 100 and notification by projecting the second contamination level image 130. However, the X-ray CT apparatus 1 does not have to execute both notification by displaying the contamination level notification screen 100 and notification by projecting the second contamination level image 130. In other words, it is sufficient for the X-ray CT apparatus 1 to execute either notification by displaying the contamination level notification screen 100 or notification by projecting the second contamination level image 130.

[0096] (Variation 5) In the first embodiment, it has been described that the X-ray CT device 1 includes the receiving function 443, the behavior determining function 444, the sterilization function 445, the contamination level estimating function 446, the cleaning order determining function 447, and the notification function 448. However, the receiving function 443, the behavior determining function 444, the sterilization function 445, the contamination level estimating function 446, the cleaning order determining function 447, and the notification function 448 may be included in other devices, not limited to the X-ray CT device 1. For example, the receiving function 443, the behavior determining function 444, the sterilization function 445, the contamination level estimating function 446, the cleaning order determining function 447, and the notification function 448 may be included in computer equipment such as a personal computer, a server, or a workstation.

[0097] (Variation 6) In the first embodiment, the sterilization device 20 is described as performing sterilization by irradiating ultraviolet light. However, the sterilization device 20 may perform sterilization by a method other than ultraviolet light. It may be a device that generates ozone by UV light, a device that sprays a disinfectant, a system that is installed in a room where the X-ray CT device 1 is placed and changes the pressure state of the room and exhausts the air in the room through a duct, or a combination of these. The sterilization device 20 performs sterilization by operating when the subject is not in the room during intervals between photographing by the X-ray CT device 1. It should be noted that, as for UV-C light, sterilization may be performed when the subject is in the room in some cases.

[0098] Although some embodiments have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, modifications, and combinations of embodiments can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope of the invention and its equivalents as described in the claims, as well as in the scope and spirit of the invention.

[0099] Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. Regarding the above embodiment, the following supplementary notes are disclosed as one aspect and optional features of the invention. (Appendix 1) a receiving unit that receives an image captured by an imaging device that includes the medical image diagnostic device in its imaging field of view; an estimation unit that estimates the degree of contamination of each part of the medical image diagnostic apparatus based on the image; a notification unit that notifies the contamination level of each unit of the medical image diagnostic apparatus; A medical image processing device comprising: (Appendix 2) The receiving unit receives examination information indicating the contents of an examination performed on a subject by the medical image diagnostic apparatus. The estimation unit may estimate the degree of contamination based on the image and the inspection information. (Appendix 3) The estimation unit may estimate the degree of contamination based on the image and a posture of the subject specified by the examination information. (Appendix 4) The estimation unit may increase the contamination level of a contacted portion based on an amount of contact by a user with the medical image diagnostic apparatus. (Appendix 5) The estimation unit may reduce the contamination level of a cleaned portion based on an amount of cleaning performed on the medical image diagnostic apparatus. (Appendix 6) The notification unit may notify by an image showing the degree of contamination of each part of the medical image diagnostic apparatus. (Appendix 7) The notification unit may notify the user by causing a display unit to display a screen in which an image showing the contamination level is superimposed on each portion of an image showing the medical image diagnostic apparatus. (Appendix 8) The notification section may change at least a part of an image indicating the contamination level in response to an operation input. (Appendix 9) The notification unit may notify the contamination level by causing a projector to project an image indicating the contamination level onto the medical image diagnostic apparatus. (Appendix 10) The medical image diagnostic apparatus may further include a sterilization control unit that causes a sterilization apparatus to perform sterilization based on the degree of contamination of each part of the medical image diagnostic apparatus. (Appendix 11) The medical image diagnostic apparatus may further include a determination unit that determines whether or not a user is cleaning the medical image diagnostic apparatus. (Appendix 12) The determination unit may determine whether the medical image diagnostic apparatus is being cleaned based on the image. (Appendix 13) A setting unit is further provided for setting the mode to a mode indicating that cleaning is in progress, The determining unit may determine whether or not cleaning is being performed based on the image and the mode. (Appendix 14) The estimation unit may reduce the level of contamination of a portion sterilized by a sterilization device that sterilizes the medical image diagnostic apparatus, based on an operation status of the sterilization device. (Appendix 15) The medical image diagnostic apparatus may further include a sterilization control unit that operates the sterilization apparatus when the medical image diagnostic apparatus is not performing imaging. (Appendix 16) The sterilization control unit may cause the sterilization apparatus to irradiate ultraviolet light. (Appendix 17) the medical image diagnostic apparatus includes a gantry having a cylindrical opening into which a subject is inserted; The sterilization control unit may cause the sterilization apparatus to irradiate the ultraviolet light toward the opening. (Appendix 18) The medical image diagnostic apparatus further includes a bed device having a tabletop on which a subject is placed, The sterilization control unit may cause the sterilization apparatus to irradiate the ultraviolet light when the top plate is inserted into the opening. (Appendix 19) a determination unit that determines an order of cleaning the medical image diagnostic apparatus based on the degree of contamination of each part of the medical image diagnostic apparatus, The notification unit may notify the cleaning order of each unit of the medical image diagnostic apparatus determined by the determination unit. (Appendix 20) A medical image diagnostic system including an imaging device that includes a medical image diagnostic device in an imaging field of view, and a medical image processing device that processes an image captured by the imaging device, The medical image processing device includes: a receiving unit for receiving an image captured by the photographing device; an estimation unit that estimates the degree of contamination of each part of the medical image diagnostic apparatus based on the image; a notification unit that notifies the contamination level of each unit of the medical image diagnostic apparatus; A medical image diagnostic system comprising: [Explanation of symbols]

[0100] 1000 Cleaning Support System 1 X-ray CT device 2 Camera 3. Projector P Subject 10 Mounting device 19a First operation panel 19b Second operation panel 20 Sterilization equipment 30 Sleeping device 40 Console device 100 Pollution level notification screen 110 Message display area 120 Contamination Estimation Map 121 Mounting device image 122 Bed device image 123 First pollution level image 130 Second pollution level image 440 Motion Control Function 441 Pre-processing function 442 Reconstruction Processing Function 443 Receiving Function 444 Action Judgment Function 445 Sterilization function 446 Contamination level estimation function 447 Cleaning order determination function 448 Notification function

Claims

1. a receiving unit that receives an image captured by an imaging device that includes the medical image diagnostic device in its imaging field of view; an estimation unit that estimates a degree of contamination of a portion touched by a user of the medical image diagnostic apparatus based on the image; a notification unit that notifies the contamination level of the portion of the medical image diagnostic apparatus by at least one of a display unit and a projector; A medical image processing device comprising:

2. the estimation unit increases the contamination level of the portion based on an amount of contact of the user with the medical image diagnostic apparatus. The medical image processing device according to claim 1 .

3. the estimation unit reduces the contamination level of the cleaned portion based on a cleaning amount of the medical image diagnostic apparatus. The medical image processing device according to claim 1 .

4. The notification unit notifies the user of the contamination level of each part of the medical image diagnostic apparatus by an image showing the contamination level of each part of the medical image diagnostic apparatus. The medical image processing apparatus according to claim 1 .

5. The notification unit notifies the user by displaying on the display unit a screen in which an image showing the contamination level is superimposed on each portion of an image showing the medical image diagnostic apparatus. The medical image processing device according to claim 4 .

6. The notification unit changes at least a part of the image indicating the contamination level in response to an operation input. The medical image processing device according to claim 5 .

7. the notification unit notifies the user by causing the projector to project an image indicating the contamination level onto the medical image diagnostic apparatus. The medical image processing device according to claim 4 .

8. a sterilization control unit that causes a sterilization apparatus to perform sterilization based on the contamination level of each part of the medical image diagnostic apparatus, The medical image processing apparatus according to claim 1 .

9. A medical image diagnostic system including an imaging device that includes a medical image diagnostic device in an imaging field of view, and a medical image processing device that processes an image captured by the imaging device, The medical image processing device includes: a receiving unit for receiving an image captured by the photographing device; an estimation unit that estimates a degree of contamination of a portion touched by a user of the medical image diagnostic apparatus based on the image; a notification unit that notifies the contamination level of the portion of the medical image diagnostic apparatus by at least one of a display unit and a projector; A medical image diagnostic system comprising:

Images