Providing scan progress indication during medical imaging

Abstract

There is a need for techniques to avoid or reduce motion artifacts in medical images. According to the invention, a control circuit for a medical imaging system is provided. The control circuit is configured to control the medical imaging system to provide a synchronized display and nudge, thereby providing information to a patient about the progress of a scan. In this way, by providing a sense of time to the patient during the scan, anxiety of the patient can be reduced, thereby reducing motion artifacts.

Description

Technical Field

[0001] This invention relates to systems and methods for providing scanning progress indication during medical imaging. Background Technology

[0002] In an MRI / CT procedure, the patient is isolated in a modal chamber and given instructions (e.g., to remain still or hold their breath at specific time intervals). The patient has a general idea of ​​how long the scan will take. For example, in an MRI / CT spine screening scan, the scan begins in the neck and moves down to the lower back. During a scan that can last up to 45 minutes, the patient is required to remain still. Patient movement can cause motion artifacts in the captured images. Summary of the Invention

[0003] Therefore, there is a need for techniques to avoid or reduce motion artifacts in MRI / CT images. The subject matter of the independent claims addresses this need. The dependent claims set forth optional features.

[0004] According to a first aspect, a control circuit for a medical imaging system is provided. The control circuit is configured to control the medical imaging system to provide synchronized display and swipes, thereby providing the patient with information about the progress of the scan.

[0005] In this way, by providing patients with a sense of time during the scan, patient anxiety can be reduced, thereby reducing motion artifacts. This is based on the understanding that informing patients, for example, at each stage of the scan progress, can reduce their anxiety and discomfort, thus allowing them to remain still during the scan. This also reduces scan time, thereby improving workflow. The subject matter in question is particularly advantageous in the context of autonomous imaging where there is no technician providing information or gentle nudges to the patient.

[0006] In particular, the synchronized display and push help draw the patient's attention to the area being scanned or the next anatomical area to be scanned, so that the area should remain still.

[0007] Feedback to patients regarding the progress of their scans can include information or instructions on when movement is permitted and / or when movement should be minimized to achieve better image quality. Therefore, improved workflows can be achieved through better patient cooperation.

[0008] Various aspects of this disclosure describe personalized and dynamic visual guidance for patients during scanning, achieved through an intelligent combination of protocol awareness and patient body detection.

[0009] In an advantageous example, the control circuitry is configured to control the medical imaging system to project a scan progress indicator onto the patient's body, specifically onto anatomical regions identified as relevant to the current or next scan. In this way, the patient's attention is more effectively drawn to the anatomical regions, allowing these regions to remain stationary, resulting in better image quality.

[0010] The control circuitry can be configured to control the medical imaging system such that the modulation in the push is synchronized with changes made to the displayed scan progress indicator. Specifically, the control circuitry can be configured to control the medical imaging system to modulate the push in synchronization with a corresponding modulation made to the display, the synchronized modulation defining an coded signal to be transmitted to the patient. For example, the coded signal indicates the start or end of the scan, or indicates that the scan will begin or end after a predetermined time period. The synchronized modulations may have the same frequency and phase. In a particular example, the control circuitry is configured to control the medical imaging system to provide intermittent pushes to the anatomical region projected onto the patient's body in synchronization with the flashing of a scan progress indicator, indicating that the anatomical region is the next anatomical region to be scanned. In any of these approaches, an effective technique is provided to convey necessary instructions to the patient as part of guided human-computer interaction without requiring disruptive movements by the patient. Therefore, patient anxiety can be further reduced, thereby correspondingly improving image quality.

[0011] For ease of implementation, the control circuit may further include: a scan phase identification module configured to identify the scan phase based on a predetermined scan sequence; a related anatomical structure identification module configured to identify one or more related anatomical structure regions for the scan; a projection module configured to generate an image for displaying to the patient via the display system of the medical imaging system; a push module configured to generate control signals for the push system of the medical imaging system; and a synchronization module configured to receive inputs from the scan phase identification module and the related anatomical structure identification module, and to provide synchronization signals to the projection module and the push module to synchronize the display with the push.

[0012] According to the second aspect, a medical imaging system including the control circuitry of the first aspect is provided.

[0013] The medical imaging system may further include a display system configured to display images to the patient and a tactile system configured to provide tactile feedback to the patient. The tactile system may include a bidirectional tactile feedback system, wherein, as part of a guided human-computer interaction process, information regarding the progress of the scan is provided to the patient.

[0014] According to a third aspect, a method for controlling a medical imaging system is provided, the method comprising controlling the medical imaging system to provide synchronized display and swipes, thereby providing the patient with information about the progress of the scan.

[0015] The method may include controlling the medical imaging system to project a scan progress indicator onto the patient's body, particularly onto anatomical regions of the patient's body that are identified as being relevant to the current scan or the next scan.

[0016] The method may include controlling the medical imaging system to synchronize the modulation in the push with changes made to a displayed scan progress indicator. Specifically, the method may include controlling the medical imaging system to modulate the push in synchronization with a corresponding modulation made to the display, the synchronized modulation defining an coded signal to be transmitted to the patient. In a particular example, the method may include controlling the medical imaging system to provide intermittent pushes to the anatomical region projected onto it in synchronization with the flashing of a scan progress indicator projected onto an anatomical region of the patient's body, indicating that the anatomical region is the next anatomical region to be scanned.

[0017] The method may further include: identifying the scan phase by a scan phase identification module based on a predetermined scan sequence; identifying one or more relevant anatomical structure regions for the scan by a relevant anatomical structure identification module; generating an image for displaying to the patient via a display system of the medical imaging system by a projection module; generating a control signal for a push system of the medical imaging system by a push module; and receiving input from the scan phase identification module and the relevant anatomical structure identification module by a synchronization module, and providing a synchronization signal to the projection module and the push module to synchronize the display and the push.

[0018] According to a fourth aspect, a computer program product is provided, the computer program product including computer-executable instructions, which, when run by a computer, enable the computer to perform the method of the third aspect.

[0019] According to a fifth aspect, a computer-readable medium is provided, on which computer-executable instructions are stored, which, when executed by a computer, enable the computer to perform the method of the third aspect.

[0020] According to the first aspect, control circuitry for a medical imaging system can also be provided, the control circuitry being configured to control the medical imaging system to provide multimodal feedback to the patient regarding scan progress. A further aspect proposes a system and method for providing a projected display and synchronized swipes to provide the patient with information about scan progress.

[0021] These and other aspects of the invention will become apparent and elucidated with reference to the embodiments described below.

[0022] The present invention may include one or more individual aspects, examples or features, or combinations thereof, whether they are disclosed in combination or individually. Attached Figure Description

[0023] A detailed description will now be given with reference to the accompanying drawings, which are provided by way of example only, in which: Figure 1 A medical imaging system is shown; Figure 2 It shows the use of Figure 1 The control circuit of the medical imaging system; Figures 3A-3C It shows that in the by Figure 1 A scan progress indicator projected onto the patient's body during imaging by a medical imaging system; and Figure 4 The illustration shows a computing device that can be used according to the systems and methods disclosed herein.

[0024] List of reference numerals in the attached diagram: 100 Medical Imaging System 102 Imaging Device 104 patients 106 X-ray beams 108 X-ray source 110 X-ray sensitive detector 112 Imaging Area 114 Display Devices 116 chambers 118 Inspection Station 120 Light Push System 122 Gently push the signal transmitter 124 Affected Area 126 Region of Interest (ROI) 128 Control Circuit 130 User Interface 132 Positioner Module 134 Location Signal Receiver 136 Display Screen / Optical Projection System 138 Display System 140 Digital Image Processor 142 Medical Images 202 Scanning Phase Identification Module 204 Anatomical Structure Recognition Module 206 Projection Module 208 Push Module 210 Synchronization Module 300 Scan progress indicator 302 Scan Direction Indicator 800 computing devices 802 processor 804 memory 806 System Bus 808 data storage device 810 Input Interface 812 Output Interface Detailed Implementation

[0025] refer to Figure 1The schematic block diagram illustrates a medical imaging system 100 including an imaging device 102 configured to acquire medical images of a patient's internal structures. The imaging device 102 in this example includes a computed tomography (CT) imaging apparatus (“CT scanner”), in which the interrogation imaging signal is an X-ray beam 106 emitted by an X-ray source 108 (e.g., an X-ray tube). The X-ray beam 106 passes through a patient 104 and is then modified (particularly attenuated) and detected at an X-ray sensitive detector 110. The X-ray sensitive detector 110 is arranged opposite the X-ray source 108 to form an imaging region 112 therebetween, in which the patient 104 is to reside during imaging. As used herein, the term “imaging” refers to the time-transmission throughput of the interrogation imaging signal (e.g., the X-ray beam 106) passing through the patient 104 and being detected at the detector 110. The digital image processor 140 is then capable of processing the intensity data registered at detector 110 into an internal anatomical or functional image 142 for display by display device 114. Imaging device 102 includes a physical housing 116 (hereinafter referred to as chamber 116) surrounding patient 104 during imaging. During imaging, patient 104 resides within chamber 116, lying on a support (e.g., examination table 118) inside chamber 116. Medical imaging system 100 includes a display system 138 comprising a display screen 136 or an optical projection system 136 mounted inside or outside chamber 116, but in either case for displaying images to the patient while the patient is in chamber 116. User interface 130 provides further input / output. Medical imaging system 100 also includes a jogging system 120 (as described now) for providing a jog to patient 104. Medical imaging system 100 also includes control circuitry 128 (as described further below) for controlling the operation of medical imaging system 100.

[0026] To make the imaging process more efficient and maximize the information captured in the images, it is important to locate a specific organ of interest (referred herein to as a region of interest (“ROI”) 126) within the imaging region 112 during imaging. The imaging region 112 is a portion of 2D or 3D space. To better support patient positioning, a push system 120 (also referred to as a patient positioning system) is provided as including one or more transmitters 122 mounted at or within a chamber 116, which can be excited to emit signals toward the patient 104. The signals emitted by the transmitters 122 cause a tactile sensation at a certain area of ​​influence 124 on the patient's skin from a distance (without physical contact with the patient 104). Examples of devices used to cause such a tactile sensation include, in particular, ultrasound transmitters. One or more transmitters 122 are configured to generate a directional or focused ultrasound beam that can be directed toward the desired area of ​​influence 124 on the patient 104. The direction of the ultrasound beam can be adjusted automatically or manually to strike the desired area of ​​influence 124 (as will be explained more fully below). The frequency and / or intensity of the ultrasound waves emitted by transmitter 122 enable the ultrasound waves to mimic mechanoreceptors located in the patient's skin. The action of transmitting a signal by transmitter 122 can encourage the patient to move to a desired position, such that the region of interest 126 is within or held within the imaging region 112. Essentially, transmitter 122 can be used to nudge or guide the patient 104 by the emitted signal, such that the patient 104 is positioned correctly and the region of interest 126 is within the imaging region 112. Hereinafter, the signal emitted by one or more transmitters 122 may be referred to herein as a "nudge signal". The action of transmitting such a signal to the patient 104 for these purposes is described herein as a "nudge". The nudge system 120 includes control circuitry 128, which controls any one or more attributes of the nudge signal, including, for example, its intensity, frequency, modulation, and direction. Control circuitry 128 automatically (particularly autonomously) controls transmitter 122 based on position signals relating to the patient 104 and / or the ROI 126. Specifically, control circuitry 128 is configured to alter the properties of the push signal based on the distance between the current position of ROI 126 and the imaging region 112. Altering the push signal in this manner includes any one or more of the following: changing the pulse frequency of the push signal, changing the intensity of the push signal, and changing the frequency of the push signal (i.e., the underlying ultrasound signal). Such a fully automated implementation, envisioned herein for autonomous imaging, requires no user action or only a low level of user action during or between imaging sessions. In this example, the push system 120 takes the form of a two-way push and feedback system, in which information about the progress of the scan is provided to the patient as part of a guided human-machine interaction process.Because the ultrasonic tactile push system is essentially a feedback-based system (as it measures the reflected signal), it is then able to calculate the displacement (in the target area, such as the arm) that the patient has made (intentionally or unintentionally), so that any particular movement can be interpreted as feedback from the patient according to a pre-scanned patient training protocol.

[0027] To allow control over the direction of the push signal, one or more transmitters in transmitter 122 can move in different spatial orientations. The transmitter 122 can be mounted using joints, articulated arms, rails, or other arrangements that allow movement (including translational and / or rotational movement). A single transmitter 122 may be sufficient if the transmitter is positioned in a suitable advantageous location and / or if sufficient degrees of freedom of movement are allowed. The movement of transmitter 122 is influenced by control circuitry 128. Specifically, control circuitry 128 instructs a suitable actuator to adjust the orientation of transmitter 122, thus adjusting the direction of the push signal emitted by transmitter 122. Suitable actuators may include any one or more of a servo motor or a stepper motor (including mechanical transmissions, hydraulic devices, one or more piezoelectric elements, any combination of the foregoing, etc.).

[0028] Transmitter 122 can be arranged as a one-dimensional or two-dimensional phased array of ultrasonic transducers. Control circuitry 128 controls the ultrasonic transducers in a manner that generates an acoustic interference pattern that produces a directional ultrasonic beam capable of inducing tactile sensations on the patient's skin at the affected area 124. The focused ultrasonic waves produce a sonic sensation of any desired intensity and / or frequency at a distance in a non-invasive manner. In embodiments, the acoustic field generated by the phased array allows for the formation of a volumetric acoustic field or a "tactile shape," such as a tactile sphere or other geometric configuration. When applied to the patient 104 at the affected area 124, the patient 104 experiences a sensation as if a physical object of a specific shape were in contact with the skin. A suitable acoustic shape (e.g., the aforementioned sphere) can be used to produce, for example, a pleasant massage effect to gently push the patient toward the imaging area 112. The pushing signal can be pulsed. The pulse frequency and / or intensity of the pushing signal can remain constant throughout the pushing process, but can also vary. More specifically, the intensity of the push signal decreases as the region of interest 126 moves closer to the imaging region 112. Additionally or alternatively, the proximity information can be modulated by changing the pulse frequency of the push signal. As the ROI 126 moves closer to the imaging region 112, the pulse frequency decreases. Similarly, the frequency of the ultrasound signal itself can be changed. Once the ROI 126 is within the imaging region 112 (i.e., once the patient 104 has assumed the correct position), the transmitter 122 ceases to emit a push signal. If the patient 104 moves (i.e., once the ROI 126 has moved within the imaging region 112), the transmitter 122 can be reactivated to encourage the patient to adopt a posture that keeps the ROI 126 within the imaging region 112. If a portion of the ROI 126 extends beyond the imaging region 112, the direction and / or intensity and / or pulse frequency of the push signal can be adjusted accordingly based on the distance between the current position of the ROI 126 and the position of the imaging region 112.

[0029] To provide the aforementioned position signal, the push system 120 includes a locator module 132 configured to establish the current position of the patient 104, specifically the current position of the ROI 126, based on the position signal. The position signal can be received by one or more position sensors 134. The current position of the ROI 126 can be defined relative to a world coordinate system. The world coordinate system can also be used to establish the position of the detector 110 and / or the X-ray source 108. The imaging region 112 can be defined as the patient envelope. This is a spatial portion appropriately delimited by a virtual or real boundary line. The locator module 132 is appropriately configured to know the spatial extent of the patient envelope. If a portion of the ROI 126 extends beyond the envelope of the imaging region 112, the transmitter 112 aims it at a suitably selected area of ​​influence 124 to induce the patient 104 to move the extended body portion back into the patient envelope. Position sensor 134 is properly positioned to receive incoming position signals from patient 104, and then locator module 132 processes this incoming position signal to establish the current position of patient 104, specifically the current position of ROI 126.

[0030] Position sensor 134 may include an optical camera or a video-based system. Positioner module 132 automatically processes the incoming position signal received by position sensor 134 into current ROI position information. Position sensor 134 may include a photosensor (e.g., a camera's photosensor) configured to receive backscattered light caused by ambient light scattered from patient 104. Position sensor 134 may include a camera system with depth sensing or thermal sensing (IF) sensors, used in addition to or in place of the described optical sensor camera. Positioner module 132 appropriately registers the images acquired by position sensor 134 to a world coordinate system. Image recognition components in positioner module 132 can be used to analyze the captured images to identify patient 104, and in particular ROI 126, within the images. ROI 126 may be geometrically defined by the geometry surrounding ROI 126. Once the locator module 132 identifies ROI 126 or another anatomical region at a known distance from ROI 126 in the image acquired from receiver 134, it maps the position within the image to the world coordinate system. Because the locator module 132 already knows the position of the imaging region 112 in world coordinates, it can calculate the relative distance between ROI 126 and imaging region 112, for example, by taking the Euclidean distance. When the push system 120 is set up, the positions and settings of one or more position sensors 134 can be used in pre-calibration using the world coordinate system, enabling the locator module 132 to map image information to the real-world distance for the distance between ROI 126 and imaging region 112. Similar 3D or 2D geometric calculations can also be applied when using a positioning module LM operating based on different positioning principles.

[0031] The incoming position signal can be at least a partial back-reflected or backscattered signal of the emitted push signal. The ultrasonic push signal itself can therefore be used for both push and ROI localization. The echo position can be used to establish the distance between ROI 126 and imaging area 112. Control circuitry 128 can control transmitter 122 to operate in either of two modes (push mode or localization mode) and can quickly switch between these two modes as needed. When operating in localization mode, the frequency of the emitted ultrasonic signal can be changed so that it does not induce a push sensation in the patient's skin. The emitted ultrasonic waves from transmitter 122 are emitted and reflected back, and are received at position sensor 134 as the incoming signal; in this example, position sensor 134 includes a receiver. The position of ROI 126 can then be established using an assessment of the induced Doppler frequency shift. Receiver 134 and transmitter 122 can be arranged as a single unit serving as a transceiver. As explained above regarding the camera-based ROI location, the ultrasound-based ROI location can be mapped to a world coordinate system to establish the relative distance between the current location of imaging region 112 and ROI 126. In other words, the ultrasound system can be used as a closed-loop control system. Specifically, the location of ROI 126 is monitored, and the push signal is adjusted by changing its modulation and / or direction in response to the current location of ROI 126 and therefore the relative distance to imaging region 112. In particular, the direction and / or (pulse) frequency and / or intensity of the push signal can be appropriately modulated based on the measured distance. As mentioned above, once ROI 126 is within imaging region 112, the push signal weakens, but the positioner module 132 can continue to monitor the location of ROI 126. If the positioner module 132 registers movement of ROI 126 within imaging region 112, then the push signal is re-issued to encourage the patient to move or readjust their posture so that ROI 126 remains within imaging region 112.

[0032] Figure 2 The control circuitry 128 of the medical imaging system 100 is illustrated in more detail. The control circuitry 128 is configured to control the medical imaging system 100 to provide synchronized display and swipes, thereby providing the patient with information about the progress of the scan. The control circuitry 128 includes a scan phase recognition module 202, an anatomical structure recognition module 204, a projection module 206, a swipe module 208, and a synchronization module 210.

[0033] The scan phase identification module 202 is configured to identify the scan phase based on a predetermined scan sequence. The scan phase identification module 202 can automatically identify the scan phase using sequence / protocol data related to the scan. The scan sequence used for the complete examination is known from previous planning. The scan phase may include indications for the current scan and / or the next scan. The actual scan status is communicated to the patient 104 in the chamber 116 via the display system 138 and the push system 120.

[0034] The anatomical structure recognition module 204 (also referred to as the relevant anatomical structure recognition module) is automatically configured to identify one or more relevant anatomical regions for the current scan and / or the next scan. This can be determined based on the selected scan type (e.g., a specific predefined scan for the lower periphery), information specified during scan planning (the operator specifies the scan field of view relative to the body), or sensors (e.g., position sensor 134 or the actuator of the examination table 118 can detect which anatomical region is isocenter of the scanner). Specifically, in MR and CT scans, scans are typically selected from a scan database sorted by anatomical structure. This information can be input to the anatomical structure recognition module 204. In MRI, operators typically prepare scans by first running a scout scan with a large field of view (e.g., the entire lower limb) and then specifying a local field of view for a specific scan of an organ (e.g., the left calf). This can be used as input to the anatomical structure recognition module 204. In MRI, specialized coils (e.g., knee coils) are typically applied to certain organs. If such a coil is used to run a scan, this information can be used as input for the anatomical structure recognition module 204. In CT, the ROI 126 can be defined after the localization scan has run, using the definition of the scan protocol and individual scan parameters. Information about the precise start / stop location can be extracted from the low-dose localization scan image and converted into the patient table position and the scan acquisition position, including X-ray dose settings. The anatomical structure recognition module 204 is able to use this information. Typically, the patient is unaware of the details of this information. However, in autonomous imaging, this information can be provided to the patient in an understandable manner to encourage cooperation and understanding of the process. This helps to minimize motion artifacts, movement away from the defined scan area, incorrect breathing patterns, and other effects that affect image quality. If no information is available from any of the aforementioned sources, the position sensor 134 (which may include one or more of a camera, a patient contour detector, and a 3D camera) can be used to determine which anatomical region is currently isocenter of the scanner.

[0035] Projection module 206 is configured to generate images displayed to patient 104 via display system 138 of medical imaging system 100. As mentioned above, in one example, display system 138 includes optical projection system 136. Projection module 206 instructs optical projection system 136 to display images projected onto the patient or the wall of chamber 116, illustrating the actual workflow status, upcoming steps and scans, and the overall progress of the process. Color-coded scan progress indicators can be projected onto the inner wall of chamber 116 in conjunction with anatomical information and scan planning. Alternatively, scan progress indicators can be projected directly onto the patient's body, for example, onto anatomical regions within the patient's body identified as relevant to the current or next scan. In this way, visualization is also provided to the patient while they are inside the scanner. This requires appropriate positioning of the displayed information and / or mirror arrangement and / or other methods to bring superimposed information into the patient's field of vision. Some information can be displayed before the patient 104 is moved onto the examination table 118 and into the scanner, while some information is displayed only inside the chamber 116. The portion of information projected onto the outside of the chamber 116 can indicate, for example, the body area to be moved into the chamber 116, allowing the patient 104 to know in advance the final body position for the start of the scan, and that the projected ROI 126 and the end position inside the chamber 116 are visible. Good pre-information effectively ensures patient satisfaction and trust in the system 100.

[0036] like Figures 3A-3C As shown, the scan progress indicator 300 can take the form of a color-coded patch projected by the optical projection system 136 onto a relevant anatomical region of the patient's body. In autonomous imaging scenarios, such as for MRI / CT, ​​it is beneficial for the patient 104 to receive information about the scan, such as the area being scanned, the scan progress, and expected interactions from the patient 104 at specific points in time during the scan. The color-coded patch 300 provides the patient 104 with information about the scanned area before and during the scan (e.g., on the examination table 118 outside the chamber 116, but more importantly, inside the chamber 116). As further described below, the projected information is synchronized with coded nibbles to communicate with the patient and inform them of the scan progress and required activities (“breathing,” “no movement,” etc.) consistent with the defined scan protocol. This projection can include different types of color coding, such as indicating the start of a scan of a specific anatomical region, the current progress of the scan, and the end of the scan. For example, Figure 3A The patch 300 projected onto the patient's torso is colored, for example, red / orange, to indicate that the scan is about to begin or has just begun, and therefore movement should be minimized or avoided. Figure 3BThe midpoint of the same scan is shown; patch 300 is now colored blue to indicate the portion of the scan that has been completed, while red / orange indicates the remaining portion of the scan that will be completed. Figure 3B The scan is performed from left to right, or from the patient's perspective, from top to bottom. Therefore, patch 300 forms a progress bar, where the progress is directly proportional to the amount of work completed, thus providing the user with an estimate of the system 100's progress in completing the scan. A scan direction indicator, such as arrow 302, can also be provided to indicate the direction of the scan. Figure 3C The endpoint of the same scan is shown, where patch 300 is now colored green to indicate scan completion, and the covered anatomical area can now be moved. In a variant, patch 300 can continuously change color (e.g., from red to green) to indicate scan progress.

[0037] For optimal preparation of patient 104, while the patient is outside the chamber 116, the anatomical areas of the patient's body to be scanned can be shown to the patient using projection and shading information. This advance information helps to identify detailed stages and progress of the scan during scanning and is also used to highlight patient actions required during the scan.

[0038] The push module 208 is configured to generate control signals for the push system 120 of the medical imaging system 100. The push module 208 uses coded signals, as further described below, to trigger the patient and inform the patient of the sequence, timing, and next scan. Where the push system 120 includes bidirectional push and feedback sensors, the system 120 can receive acknowledgments and acceptance messages from the patient and may also provide options for patient control.

[0039] The synchronization module 208 (synchronized projection and push module) is configured to receive input from the scan phase recognition module 202 and input from the anatomical structure recognition module 204, and to provide synchronization signals to the projection module 206 and the push module 208 for synchronized display and push. This helps to draw the patient's attention to a specific organ, such as the organ to be scanned next and which should remain still. In one example, such as Figures 3A-3CAs shown, a stained patch is projected onto the organ, and before scanning the organ, the patch is modulated to flash (on / off) at a frequency of 2 Hz, for example, five times. Simultaneously, a remote push is performed on the organ at the exact same frequency and in phase with the flashing. The projection of the scan progress indicator is thus synchronized with the interactively coded push. Such synchronization allows for other examples of specific communications with the patient during the scan. Actions such as breathing patterns and immobility can be precisely indicated at specific points in time, as indicated by the scan protocol, to achieve optimal image quality. Depending on the scan phase, these time points can be derived from the planned scan protocol, real-time image analysis, and system progress information, aided by anatomical structure recognition.

[0040] Therefore, control circuit 128 can be configured to control the medical imaging system to synchronize the modulation in the push with changes made to the displayed scan progress indicator. Specifically, control circuit 128 can be configured to control the medical imaging system 100 to modulate the push in synchronization with corresponding modulation made to the display, the synchronized modulation defining an coded signal to be transmitted to the patient. For example, the coded signal may indicate the start or end of a scan, or indicate that the scan will begin or end after a predetermined time period. Therefore, control circuit 128 is configured to modulate further information intended for the patient onto the push signal. This information may be modulated by frequency and / or amplitude modulation or other means to produce a modulation pattern representing the coded signal. The push signal thus encodes this information in the modulation pattern. In this way, control circuit 128 can generate an coded tactile signal. This coded tactile signal can be used during the imaging process, not only to convey instructions such as "hold your breath" or "stay still," but also in relation to providing other information about the imaging or supporting the clinical procedures to be performed. Possible modulation patterns may include any one or more of the following: different pulse counts (absolute or per unit time (frequency) values), different intensities (amplitudes), and different durations of the applied pulse sequence. Any of the patterns mentioned above can encode any of the following: a request for positioning, an amount by which a body part should move / shift / rotate, an indication that a procedure is in progress, etc. Encoded signals can be used for compliance / cooperation examinations. The displayed images can be interpreted using explanatory text and / or images to represent the semantic meaning of a particular modulation pattern, which explains or decodes the meaning of the modulation pattern and its encoding for the patient.

[0041] While the medical imaging system 100 described above includes a CT scanner, it should be understood that the invention is also applicable to other medical imaging techniques, such as MRI. In MRI, the detection unit 110 includes one or more radio frequency coils capable of picking up radio wave signals. When relaxed back to alignment with the strong magnetic field generated by the MRI imager during imaging, disturbed protons in the patient's tissue emit radio wave signals.

[0042] It should be understood that techniques other than ultrasound can be used to provide a tactile sensation. For example, emitter 122 may include one or more air nozzles configured to emit a directional jet of air, thereby eliciting a tactile sensation and achieving a tactile sensation. In other examples, one or more electromagnetic radiation-based emitters 122 configured to elicit a tactile sensation are used. Specifically, the electromagnetic radiation is configured to excite mechanoreceptors embedded in the patient's skin. Emitter 122 may include a laser emitter capable of operating at a suitable frequency. Electromagnetic fields such as lasers can also produce tactile effects remote from the excitation source. Thermal radiation can be used. Certain receptors in human skin (e.g., TRPV1) respond not only to heat but also to pain. By sequentially eliciting these two responses, a tactile sensation can be evoked. This can be achieved by controlling the heat source used as emitter 122 (e.g., a halogen lamp, etc.), with emitter 122 properly focused using one or more reflectors and the focal spot rapidly switched. Any combination of these techniques can be used.

[0043] The topics described herein can be applied to optimize or improve radiological workflows in medical imaging applications such as MRI, CT, AMI, DXR, etc. The workflows and technical implementations are particularly applicable to CT and MRI scans. However, there are some minor differences during the scan, especially in terms of patient movement. CT scans are typically performed over a much shorter time period. For this reason, the timing and type of swipe command are preferably short and precise to achieve minimal delay and immediate patient response. For MRI, the total scan time is generally much longer, in which case the trade-off between time and quality optimization may influence the timing and type of swipe commands to the patient.

[0044] Now for reference Figure 4The illustration shows a high-level diagram of an exemplary computing device 800 that can be used according to the systems and methods disclosed herein. The computing device 800 includes at least one processor 802 that executes instructions stored in a memory 804. These instructions may be, for example, instructions for implementing functions described as being performed by one or more of the aforementioned components, or instructions for implementing one or more of the aforementioned methods. The processor 802 can access the memory 804 via a system bus 806. In addition to storing executable instructions, the memory 804 may also store dialog input, scores assigned to the dialog input, etc.

[0045] The computing device 800 also includes a data storage device 808 accessible by the processor 802 via the system bus 806. The data storage device 808 may include executable instructions, log data, etc. The computing device 800 also includes an input interface 810 that allows external devices to communicate with it. For example, the input interface 810 may be used to receive instructions from external computer devices, users, etc. The computing device 800 also includes an output interface 812 that connects the computing device 800 to one or more external device interfaces. For example, the computing device 800 may use the output interface 812 to display text, images, etc.

[0046] External devices intended to communicate with computing device 800 via input interface 810 and output interface 812 can be included in an environment that provides virtually any type of user interface that a user can interact with. Examples of user interface types include graphical user interfaces, natural user interfaces, etc. For example, a graphical user interface can accept input from a user using one or more input devices (e.g., a keyboard, mouse, remote control, etc.) and provide output on an output device (e.g., a display). Conversely, a natural user interface allows a user to interact with computing device 800 in a manner unconstrained by input devices (e.g., a keyboard, mouse, remote control, etc.). Instead, a natural user interface can rely on speech recognition, touch and stylus recognition, on-screen and near-screen gesture recognition, air gestures, head and eye tracking, voice and speech, vision, touch, gestures, machine intelligence, etc.

[0047] Furthermore, although illustrated as a single system, it should be understood that computing device 800 can also be a distributed system. Therefore, for example, several devices can communicate via a network connection and collaboratively perform tasks described as being performed by computing device 800.

[0048] The various functions described herein can be implemented in hardware, software, or any combination thereof. If implemented in software, these functions can be stored or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer-readable storage media. A computer-readable storage medium can be any available storage medium accessible by a computer. By way of example and not limitation, such computer-readable storage media can include RAM, ROM, EEPROM, CD-ROM or other optical disc storage devices, magnetic disk storage devices or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer. The disks and optical discs used herein include compact optical discs (CDs), laser optical discs, optical discs, digital versatile optical discs (DVDs), floppy disks, and Blu-ray discs (BDs), wherein disks typically reproduce data magnetically, while optical discs typically reproduce data optically using lasers. Additionally, transmitted signals are not included within the scope of computer-readable storage media. Computer-readable media also include communication media, including any medium that facilitates the transfer of computer programs from one place to another. For example, a connection can be a communication medium. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of communication media. Combinations of the above should also be included within the scope of computer-readable media.

[0049] Alternatively or additionally, the functions described herein can be performed at least in part by one or more hardware logic components. For example, but not limited to, illustrative types of hardware logic components that can be used include field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), system-on-a-chip (SoCs), complex programmable logic devices (CPLDs), etc.

[0050] It will be recognized that, in addition to the functions mentioned, the circuit described above can also have other functions, and these functions can be performed by the same circuit.

[0051] The applicant therefore individually discloses each individual feature described herein, as well as any combination of two or more such features, which, to some extent, can be implemented based on the general knowledge of those skilled in the art and on the whole content of this specification, regardless of whether such features or combinations of features solve any problem disclosed herein, and without limiting the scope of the claims. The applicant notes that various aspects of the invention may include any such individual feature or combination of features.

[0052] It should be noted that embodiments of the present invention are described with reference to different categories. In particular, some examples are described with reference to methods, while other examples are described with reference to apparatus. However, those skilled in the art will understand from the specification that, unless otherwise stated, any combination of features involving different categories, in addition to any combination of features belonging to one category, is also considered part of the disclosure of this application. However, all features can be combined to provide synergistic effects, and are not merely a simple summation of these features.

[0053] Although the invention has been described and illustrated in detail in the accompanying drawings and the foregoing description, such description and illustration are to be considered exemplary and not restrictive. The invention is not limited to the disclosed embodiments.

[0054] Those skilled in the art will understand and implement other variations of the disclosed embodiments by studying the accompanying drawings, the disclosure, and the claims. In the claims, the word "comprising" does not exclude other elements or steps, and the words "a" or "an" do not exclude a plurality. A single processor or other unit can implement the functions of several items recited in the claims. Although certain measures are recited in dissimilar dependent claims, this does not imply that combinations of these measures cannot be advantageously used. Computer programs can be stored / distributed on suitable media, such as optical storage media or solid-state media supplied together with or as part of other hardware, but can also be distributed in other forms, such as via the Internet or other wired or wireless telecommunications systems. No reference numerals in the claims should be construed as limiting the scope.

Claims

1. A control circuit for a medical imaging system, the control circuit being configured to control the medical imaging system to provide synchronized display and swipe, thereby providing the patient with information about the progress of the scan, wherein, The control circuit is also configured to control the medical imaging system to modulate the push in sync with a corresponding modulation applied to the display, the synchronized modulation defining an coded signal to be transmitted to the patient.

2. The control circuit of claim 1 is further configured to control the medical imaging system to project a scan progress indicator onto the patient's body.

3. The control circuit of claim 2 is further configured to control the medical imaging system to project the scan progress indicator onto an anatomical region of the patient’s body that is identified as being related to the current scan or the next scan.

4. The control circuit according to any one of claims 1-3 is further configured to control the medical imaging system such that the modulation in the push is synchronized with the change made to the displayed scan progress indicator.

5. The control circuit according to any one of claims 1-3, wherein, The modulation of the coded signal to be transmitted to the patient is defined to include one or more of the following modulation modes: different absolute pulse counts, different pulse frequencies, different intensities, and different durations of the applied pulse sequence.

6. The control circuit according to claim 1, wherein, The encoded signal indicates the start or end of the scan, or indicates that the scan will begin or end after a predetermined time period.

7. The control circuit according to claim 1 or 6, wherein, The synchronized modulations have the same frequency and phase.

8. The control circuit according to any one of claims 1-3 is further configured to control the medical imaging system to provide intermittent nibbles to the anatomical region in sync with the flashing of a scan progress indicator projected onto the anatomical region of the patient's body, to indicate that the anatomical region is the next anatomical region to be scanned.

9. The control circuit according to any one of claims 1-3, further comprising: A scanning phase identification module is configured to identify the phase of the scan based on a predetermined scanning sequence; A related anatomical structure recognition module is configured to recognize one or more related anatomical structure regions for the scan; A projection module configured to generate an image for display to the patient via the display system of the medical imaging system; A push module configured to generate control signals for the push system of the medical imaging system; as well as A synchronization module is configured to receive input from the scanning phase recognition module and input from the relevant anatomical structure recognition module, and to provide synchronization signals to the projection module and the push module to synchronize the display with the push.

10. A medical imaging system comprising a control circuit according to any one of claims 1-9.

11. The medical imaging system of claim 10, further comprising a display system configured to display an image to the patient and a tactile system configured to provide a tactile push to the patient.

12. The medical imaging system according to claim 11, wherein, The push system includes a two-way push and a feedback system, wherein, as part of a guided human-computer interaction process, the patient is provided with information about the progress of the scan.

13. A method for controlling a medical imaging system, the method comprising: The medical imaging system is controlled to provide synchronized display and swipes, thereby providing the patient with information about the progress of the scan; and The medical imaging system is controlled to modulate the push in sync with a corresponding modulation made to the display, the synchronized modulation defining the coded signal to be transmitted to the patient.

14. A computer program product comprising computer-executable instructions that, when executed by a computer, enable the computer to perform the method of claim 13.

15. A computer-readable medium having stored thereon computer-executable instructions, which, when executed by a computer, enable the computer to perform the method according to claim 13.

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