CN117958789A - Scanning bed movement control method and device, magnetic resonance equipment and storage medium - Google Patents
Scanning bed movement control method and device, magnetic resonance equipment and storage medium Download PDFInfo
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
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- G01R33/56375—Intentional motion of the sample during MR, e.g. moving table imaging
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Abstract
The application relates to a scanning bed movement control method, a scanning bed movement control device, magnetic resonance equipment and a storage medium. The method is applicable to a medical imaging system, comprising: controlling the movement of the scanning bed so that the detection object moves to a field of view area of the medical imaging system along with the scanning bed; initially scanning the detection object to obtain an anatomical image of the detection object in a field of view region; determining an organ of interest from the anatomical image and determining whether there is a shift between the center of the organ of interest and the center of the field of view region; if the center of the organ of interest is offset from the center of the field of view area, controlling the scanning bed to move again so that the center of the organ of interest is positioned at the center of the field of view area; according to the method, fine positioning of the scanning bed is realized through twice control, so that the center of an interested organ of a detection object on the scanning bed is matched with the center of a field of view area of a medical imaging system, the accuracy of moving bed positioning is improved, the total time consumption of single patient examination is reduced, and the examination efficiency is improved.
Description
Technical Field
The present application relates to the field of magnetic resonance technology, and in particular, to a method and apparatus for controlling movement of a scanning bed, a magnetic resonance device, and a storage medium.
Background
When performing medical image scanning, the medical image scanning device should be aligned with the part to be scanned of the patient so as to obtain a medical image of the part to be scanned, and therefore, before scanning imaging, a technician needs to adjust the relative position between the patient and the medical image scanning device so as to match the part to be scanned of the patient with the imaging center of the medical image scanning device.
For example: for a magnetic resonance imaging (Magnetic Resonance Imaging, MRI) device, after a patient is lying on a scanning bed, the scanning bed needs to be controlled to move towards the aperture direction of the magnetic resonance device, so that a part to be scanned of the patient moves to the center of a magnet of the magnetic resonance device, so as to ensure that the part to be scanned of the patient is matched with the imaging center of the magnetic resonance device.
However, the conventional method of moving the scanning bed cannot ensure an accurate match between the part to be scanned of the patient and the center of the magnet after moving the bed. Therefore, the conventional method for moving the scanning bed has low accuracy in moving the scanning bed.
Disclosure of Invention
In view of the foregoing, there is a need for a method, apparatus, magnetic resonance device, computer-readable storage medium, and computer program product for gantry movement control that can improve the accuracy of gantry movement to accurately match the patient's region to be scanned and the imaging center.
In a first aspect, the present application provides a method of controlling movement of a scanning bed, suitable for use in a medical imaging system, the method comprising:
Controlling the movement of the scanning bed so that the detection object moves to a field of view area of the medical imaging system along with the scanning bed;
Initially scanning the detection object to obtain an anatomical image of the detection object in a field of view region;
Determining an organ of interest from the anatomical image and determining whether there is a shift between the center of the organ of interest and the center of the field of view region;
In case there is an offset of the center of the organ of interest from the center of the field of view area, the scanning bed movement is controlled again such that the center of the organ of interest is positioned in the center of the field of view area.
In one embodiment, determining whether there is an offset of the center of the organ of interest from the center of the field of view region comprises:
judging whether the center of the organ of interest is located in a preset range of the center of the field of view area;
In the case that the center of the organ of interest is not located within a preset range of the center of the field of view region, it is determined that there is a shift in the center of the organ of interest from the center of the field of view region.
In one embodiment, controlling the couch movement again such that the center of the organ of interest is positioned at the center of the field of view region comprises:
determining the moving direction and the moving distance of the scanning bed; wherein the direction of movement comprises a first direction in and out along an aperture of the magnetic resonance apparatus;
The movement of the couch is controlled such that the center of the organ of interest is positioned at the center of the field of view region, depending on the direction and distance of movement of the couch.
In one embodiment, controlling the movement of the scanning bed such that the center of the organ of interest is positioned at the center of the field of view region according to the movement direction and the movement distance of the scanning bed comprises:
sending a bed moving control request to control equipment;
in the case of receiving a move-bed control instruction transmitted by the control device in response to the move-bed control request, the move-bed is controlled to move so that the center of the organ of interest is positioned at the center of the field-of-view region, according to the moving direction and the moving distance of the scan-bed.
In one embodiment, the initial scanning of the detection object to obtain an anatomical image of the detection object in the field of view comprises:
determining an initial scan sequence; wherein the initial scanning sequence is a rapid imaging sequence;
and according to the initial scanning sequence, performing initial scanning on the detection object to obtain an anatomical image of the detection object in the field of view.
In one embodiment, the method further comprises:
And under the condition that the center of the organ of interest is positioned at the center of the field of view area, performing target scanning on the detection object to obtain a target medical image of the detection object in the field of view area.
In one embodiment, the method further comprises:
determining location information of the organ of interest;
And adjusting positioning image protocol parameters according to the position information of the organ of interest.
In a second aspect, the application also provides a scanning bed movement control device. Suitable for use in a medical imaging system, the apparatus comprising:
a first control module for controlling the movement of the scanning bed so that the detection object moves to a field of view region of the medical imaging system along with the scanning bed;
The scanning module is used for carrying out initial scanning on the detection object to obtain an anatomical image of the detection object in a field of view area;
the judging module is used for determining an organ of interest from the anatomical image and judging whether the center of the organ of interest is deviated from the center of the field of view area or not;
And a second control module for controlling the scanning bed to move again so that the center of the organ of interest is positioned at the center of the field of view area in the case that the center of the organ of interest is offset from the center of the field of view area.
In a third aspect, the application also provides a magnetic resonance apparatus. The magnetic resonance apparatus comprises a memory storing a computer program and a processor implementing the steps of the method for controlling the movement of a scanning bed in the first aspect when said computer program is executed.
In a fourth aspect, the present application also provides a computer-readable storage medium. The computer readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the scanning bed movement control method in the first aspect described above.
In a fifth aspect, the present application also provides a computer program product comprising a computer program which, when executed by a processor, implements the steps of the scanning bed movement control method of the first aspect described above.
The above-described scanning bed movement control method, apparatus, magnetic resonance device, storage medium and computer program product, the method being applicable to a medical imaging system by controlling the scanning bed movement such that a detection object moves with the scanning bed to a field of view region of the medical imaging system; then, carrying out initial scanning on the detection object to obtain an anatomical image of the detection object in a field of view area; determining an organ of interest from the anatomical image and determining whether there is a shift between the center of the organ of interest and the center of the field of view region; in the case that there is an offset of the center of the organ of interest from the center of the field of view region, controlling the scanning bed to move again so that the center of the organ of interest is positioned at the center of the field of view region; that is, in this embodiment, fine positioning of the scanning bed is achieved through two controls, so that the center of the organ of interest of the detection object on the scanning bed is matched with the center of the field of view area of the medical imaging system, and accuracy of moving bed positioning is improved; compared with the traditional method, particularly in the case that the internal organ or the part to be scanned of the scanned object is covered by the coil, after the scanning bed is moved for the first time, the organ of interest can be identified by rapid scanning, and secondary fine moving bed is realized based on the center of the organ of interest and the center of the field of view area, so that not only can the accuracy of moving bed positioning be improved, but also the repeated moving bed operation and rescanning operation caused by inaccurate moving bed positioning can be avoided, the total time consumption of single patient examination is reduced, and the examination efficiency is improved; in addition, the fine moving bed method adopted by the embodiment of the application has extremely short scanning treatment time loaded after the primary moving bed, so that the whole moving bed time is shorter, and the rapidity and the accuracy of moving bed positioning can be improved.
Drawings
FIG. 1 is a diagram of an application environment for a method of controlling movement of a scanner bed in one embodiment;
FIG. 2 is a flow chart of a method of controlling movement of a scanner bed according to an embodiment;
FIG. 3 is a flow chart of a method of controlling movement of a scanner bed according to another embodiment;
FIG. 4 is a flow chart of a method of controlling the movement of a scanner bed according to another embodiment;
FIG. 5 is a flow chart of a method of controlling movement of a scanner bed according to another embodiment;
FIG. 6 is a flow chart of a method of controlling movement of a scanner bed according to another embodiment;
FIG. 7 is a schematic diagram of a complete flow of a method of controlling movement of a scanner bed in one embodiment;
FIG. 8 is a schematic representation of an anatomical image obtained from an initial scan in one embodiment;
FIG. 9 is a diagram of a positioning image obtained by performing a first breath-hold scan based on a conventional laser lamp positioning method in one embodiment;
FIG. 10 is a diagram of a positioning image obtained by performing a second breath-hold scan based on a conventional laser lamp positioning method in one embodiment;
FIG. 11 is a block diagram of a scanner bed movement control device in one embodiment;
figure 12 is an internal block diagram of a magnetic resonance apparatus in one embodiment.
Detailed Description
The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.
In general, when performing an image scan, whether the patient is lying down for the image scan or standing up for the image scan, a technician needs to move a scanner bed or a scanner apparatus to align the patient's portion to be scanned.
Taking a scanning bed as an example, the conventional scanning bed moving method mainly includes two methods, in the first method, after a patient lays on a scanning bed board, a technician projects vertical laser fixed at an aperture entrance onto a part to be scanned (such as a skull, a neck, etc.), and drives the scanning bed to move a position to which a laser lamp is projected to a system center, so that the part to be scanned of the patient is moved to an imaging center of a medical image scanning device. Second, after the patient lays on the scanning bed board, the technician designates the part to be scanned (such as skull, neck, abdomen, etc.) through the operation interface, and after the camera in the scanning room shoots and identifies the part to be scanned of the patient, the sickbed is driven to move, and finally the part to be scanned of the patient is moved to the imaging center of the medical image scanning device.
However, both of the above implementations have some scenarios where the moving bed positioning is not accurate enough. For example, when an internal organ (such as a heart) of a human body is to be positioned to an imaging center, because the size and the relative position of the organ of each patient are different, a technician and a camera cannot directly see the position of the organ through the surface of the human body, so that after a scanning bed moves to the imaging center, the patient is not accurately positioned when the system scans a positioning image of the patient, the patient needs to be further moved, the time consumption of single patient examination is increased, and the patient throughput of a department is reduced. For MRI devices, the patient surface may also be covered with radio frequency coil structures, which further obstruct the technician's view with the camera, and is one of the reasons for inaccurate moving bed positioning.
Based on the above, the application provides a scanning bed movement control method, after the part to be scanned of a patient is moved to an imaging center by the traditional technology, a patient image is obtained by quick scanning by utilizing a magnetic resonance signal, an interested part or organ is identified by adopting an algorithm, fine moving bed is performed again, the interested part or organ is accurately moved to the imaging center of scanning equipment, and the accuracy of moving bed positioning is improved.
The following describes a technical scheme related to an embodiment of the present disclosure in conjunction with a scenario in which the embodiment of the present disclosure is applied.
The method for controlling the movement of the scanning bed provided by the embodiment of the application can be applied to an application environment shown in figure 1. The medical image scanning device may include a single-mode imaging device such as an electronic computed tomography (Computed Tomography, CT) scanning device, an MRI scanning device, a positron emission computed tomography (Positron Emission Tomography, PET) or a hybrid-mode imaging device such as PET-MR, PET-CT, etc., and the device includes a scanning bed and a scanning frame, and after a patient is laid on the scanning bed, the scanning bed is controlled to move toward an aperture direction of the scanning frame so as to position a part to be scanned of the patient for subsequent scanning and obtaining a medical image. Further, the medical image scanning device can be provided with a medical imaging system, and the scanning bed is controlled to move so as to move the part to be scanned of the patient to an imaging center of the medical imaging system, so that medical image scanning is realized.
In one embodiment, as shown in fig. 2, a method for controlling movement of a scanning bed is provided, which is applicable to a medical imaging system, and is described by taking the application of the method to the medical image scanning apparatus of fig. 1 or a processor of the medical image scanning apparatus as an example, and includes the following steps:
Step 201, control the movement of the scanning bed so that the detection object moves to the field of view area of the medical imaging system along with the scanning bed.
The field of view area of the medical imaging system is the imaging area of the medical image, and the detection object is moved to the field of view area of the medical imaging system, namely the part to be detected of the detection object is moved to the imaging area of the medical imaging system; the part to be detected can be head, abdomen, shoulder joint, knee joint, internal organ, etc., and the internal organ can include heart, lung, liver, double kidney, prostate, uterus, etc.
Optionally, the movement of the scanning bed can be controlled by adopting a laser projection mode, and the movement of the scanning bed can be controlled by adopting a camera shooting mode, and of course, the movement of the scanning bed can be controlled by adopting other modes, so that the detection object moves to a field of view area of the medical imaging system along with the scanning bed; as an example, other modes may further include a marking point mode, that is, a plurality of marking points are set in an aperture direction of the scanning bed, a target marking point corresponding to a to-be-detected portion of the object to be detected is determined according to the to-be-detected portion, and then the scanning bed is controlled to move according to the target marking point, so that the target marking point moves to a field of view area, and further, the detected object can move to the field of view area of the medical imaging system along with the scanning bed.
It should be noted that, when the movement of the scanning bed is controlled for the first time, any conventional method for positioning the movement of the scanning bed may be used to control the movement of the scanning bed, which is not particularly limited in the embodiment of the present application.
Step 202, performing initial scanning on the detection object to obtain an anatomical image of the detection object in a field of view region.
After the scanning bed is controlled to move for the first time, the part to be detected of the detection object can be moved to a field of view area of the medical imaging system, but the center of the part to be detected cannot be completely consistent with the center of the field of view area, especially in the case that the part to be detected is an internal organ of the detection object, in view of the difference between the size and the relative position of the internal organ of each detection object, the traditional method cannot directly see the organ position through the surface of a human body, so that the probability of the difference between the center of the part to be detected of the detection object and the center of the field of view area is larger after the scanning bed is moved for the first time; in order to ensure the quality of medical imaging, the center of the part to be detected should be kept consistent with the center of the field of view area in order to obtain an accurate medical image of the part to be detected.
In addition, it should be noted that, in the case of using the conventional method to cover the portion to be detected, such as the shoulder joint or the knee joint, which is covered by the coil, in the detection, there is a case that the center of the portion to be detected is not identical to the center of the field of view region after the moving bed, so the method proposed in the embodiment of the present application is also applicable to this case.
In this embodiment, when judging whether the center of the portion to be detected is consistent with the center of the field of view region, an anatomical image of the detection object under the field of view region is obtained by performing initial scanning on the detection object, and further, whether the center of the portion to be detected is consistent with the center of the field of view region is judged based on the anatomical image; the initial scan is not a final image scan of the detection object, and it can be understood that the initial scan is a rapid image scan of the detection object; for example: the medical image scanning equipment can scan the detection object for less than 3 seconds in a large-view-field low-resolution MR sequence so as to obtain a low-resolution anatomical image corresponding to a part to be detected of the detection object; the anatomical image may be a reconstructed image obtained by performing rapid image scanning on the detection object and reconstructing the detection object according to the scanning data, and the anatomical image may be a three-dimensional image or a two-dimensional image.
Step 203, determining an organ of interest from the anatomical image, and determining whether there is a deviation between the center of the organ of interest and the center of the field of view region.
In the case that the portion to be detected of the detection object is an internal organ of the detection object, the organ of interest is the portion to be detected, for example: and (3) a heart.
In this embodiment, after an anatomical image of a detection object is obtained by scanning, image analysis may be performed on the anatomical image, and an organ of interest in the anatomical image may be determined; optionally, a preset classification algorithm may be used to segment the anatomical image for the organ of interest, thereby determining the organ of interest; for the preset classification algorithm, the preset classification algorithm can be a recognition algorithm based on a traditional image, a recognition algorithm based on machine learning, a recognition algorithm based on deep learning and the like; in addition, the preset classification algorithm can be an algorithm for detecting and identifying based on a 3D image, and can also be an algorithm for realizing detecting and identifying based on a 2D multilayer imaging principle; the type of the preset classification algorithm and the recognition principle of the preset classification algorithm are not particularly limited in the embodiment of the application, that is, the manner of determining the organ of interest from the anatomical image is not particularly limited in the embodiment of the application.
Then, after the organ of interest is determined, the center of the organ of interest may be further determined, the center of the organ of interest may be the center of gravity, the center of mass, the center, etc. of the organ of interest, and the center position coordinates of the organ of interest may be obtained, and in the three-dimensional image, the center position coordinates of the organ of interest may be three-dimensional coordinates.
Further, it can be determined whether there is a shift between the center position coordinates of the organ of interest and the center position coordinates of the field of view region; when the medical image scanning is performed, for the vertical direction (namely, the Y-axis direction in the three-dimensional coordinate system), namely, the direction perpendicular to the plane where the scanning bed is positioned, or the direction of the detection object pointing from the front face to the back face of the body after the detection object is placed on the scanning bed in a supine mode, the influence of the deviation in the direction on the image scanning can be considered to be small, even no influence exists; the same is true for the scanning bed in the X-axis direction (the left-right direction in which the detection object is placed behind the scanning bed in a supine manner); therefore, in the present embodiment, only the offset translation in the Z-axis direction (the direction from the head to the foot of the detection object) can be considered. Based on this, it can be determined whether there is a shift between the coordinate position corresponding to the Z-axis direction of the center position coordinate of the organ of interest and the coordinate position corresponding to the Z-axis direction of the center position coordinate of the field of view region.
Optionally, when judging whether there is an offset between the corresponding coordinate positions, it may be judged whether the corresponding coordinate positions are consistent to judge whether there is an offset between the two, and if the corresponding coordinate positions are inconsistent, it may be considered that there is an offset in the coordinate direction; of course, when judging whether there is an offset, it may also be judged whether the center of the organ of interest is located within a preset range of the center of the field of view region, and in the case where the center of the organ of interest is not located within the preset range of the center of the field of view region, it may be determined that there is an offset between the center of the organ of interest and the center of the field of view region. For the preset range, it may be a circular range with the center of the field of view area as the center and the preset deviation as the radius; or a rectangle or square range formed by taking the center of the field of view area as the center of the circle and combining the preset deviation in the X-axis direction and the preset deviation in the Z-axis direction; of course, the preset range may be other shapes, which are not limited in particular by the embodiment of the present application.
In case there is an offset of the center of the organ of interest from the center of the field of view area, step 204, the scanning bed movement is controlled again such that the center of the organ of interest is positioned in the center of the field of view area.
That is, when it is determined that the center of the organ of interest is not at the center of the field of view region or is not within a certain range of the center of the field of view region in the anatomical image obtained by the rapid scan, it is necessary to control the movement of the couch again to move the organ of interest of the subject to the center of the field of view region, so that the couch moving control of the couch and the scan positioning of the portion of the subject to be detected are completed.
The scanning bed movement control method is suitable for a medical imaging system, and the detection object moves to a field of view area of the medical imaging system along with the scanning bed by controlling the scanning bed to move; then, carrying out initial scanning on the detection object to obtain an anatomical image of the detection object in a field of view area; determining an organ of interest from the anatomical image and determining whether there is a shift between the center of the organ of interest and the center of the field of view region; in the case that there is an offset of the center of the organ of interest from the center of the field of view region, controlling the scanning bed to move again so that the center of the organ of interest is positioned at the center of the field of view region; that is, in this embodiment, fine positioning of the scanning bed is achieved through two controls, so that the center of the organ of interest of the detection object on the scanning bed is matched with the center of the field of view area of the medical imaging system, and accuracy of moving bed positioning is improved; compared with the traditional method, particularly in the case that the internal organ or the part to be scanned of the scanned object is covered by the coil, after the scanning bed is moved for the first time, the organ of interest can be identified by rapid scanning, and secondary fine moving bed is realized based on the center of the organ of interest and the center of the field of view area, so that not only can the accuracy of moving bed positioning be improved, but also the repeated moving bed operation and rescanning operation caused by inaccurate moving bed positioning can be avoided, the total time consumption of single patient examination is reduced, and the examination efficiency is improved; in addition, the fine moving bed method adopted by the embodiment of the application has extremely short scanning treatment time loaded after the primary moving bed, so that the whole moving bed time is shorter, and the rapidity and the accuracy of moving bed positioning can be improved.
FIG. 3 is a flow chart of a method for controlling the movement of a scanning bed according to another embodiment. This embodiment relates to an alternative implementation of the medical image scanning apparatus controlling the movement of the scan bed again such that the center of the organ of interest is located at the center of the field of view, and the step 204 includes, based on the above embodiment, as shown in fig. 3:
In step 301, the direction and distance of movement of the scanning bed is determined.
Wherein the direction of movement comprises a first direction in and out along an aperture of the magnetic resonance apparatus. Based on the above analysis, the first direction may be a Z-axis direction, i.e., a forward and backward movement direction of the scanning bed with respect to the scanning frame.
Optionally, for the Z-axis direction, it is determined whether there is a shift in the center of the organ of interest from the center of the field of view region, and if there is a shift in the Z-axis direction, the moving direction and the moving distance corresponding to the Z-axis direction are further determined, where the moving direction is the positive Z-axis direction or the negative Z-axis direction. In addition, the movement distance is determined according to the coordinates of the center of the organ of interest and the coordinates of the center of the field of view region corresponding to the respective axes.
Step 302, controlling the movement of the scanning bed according to the movement direction and the movement distance of the scanning bed so that the center of the organ of interest is positioned at the center of the field of view area.
In the embodiment, during secondary moving, the moving direction and the moving distance of the scanning bed are determined, so that the scanning bed is controlled to move according to the moving direction and the moving distance of the scanning bed, and the center of the organ of interest is positioned at the center of the field of view area; wherein the direction of movement comprises a first direction in and out along an aperture of the magnetic resonance apparatus; by adopting the method in the embodiment, the center of the organ of interest can be moved to the center of the field of view area, so that fine bed moving is realized, and the accuracy of the bed moving is improved.
FIG. 4 is a flow chart of a method for controlling the movement of a scanning bed according to another embodiment. This embodiment relates to an optional implementation process of the medical image scanning apparatus controlling the movement of the scanning bed according to the movement direction and the movement distance of the scanning bed so that the center of the organ of interest is located at the center of the field of view, and on the basis of the above embodiment, as shown in fig. 4, the step 302 includes:
step 401, sending a bed shift control request to a control device.
The moving direction and the moving distance of the scanning bed can be carried in the moving bed control request. The control device can be a device in the operation room and in communication connection with the medical image scanning device in the scanning room, and can also be a handheld control device for technician operation, and the control device can be used for performing bed moving control on a scanning bed in the medical image scanning device.
Optionally, before the secondary bed moving, the medical image scanning device may send a bed moving control request to the control device, and the control device may output a bed moving control prompt message to the technician in response to the bed moving control request, so that the technician determines whether the secondary bed moving control is required. Optionally, the control device may display the moving bed control prompt information in a display interface, or may output the moving bed control prompt information in a voice broadcast mode, which is not limited in the embodiment of the present application.
In step 402, in the case of receiving a move-bed control instruction sent by the control device in response to the move-bed control request, the move-bed is controlled to move so that the center of the organ of interest is positioned at the center of the field-of-view region according to the moving direction and the moving distance of the scan-bed.
That is, in the case where the technician determines that the second couch movement is required, the medical image scanning apparatus controls the couch to move according to the determined moving direction and moving distance of the couch. Accordingly, in the case where the technician determines that the secondary bed movement is not required, for example: under the condition that the control device starts a bed movement prohibition instruction to the medical image scanning device, the medical image scanning device does not control the scanning bed to move.
In this embodiment, before the medical image scanning device controls the scanning bed to perform secondary moving, a moving bed control request is sent to the control device, and then, under the condition that a moving bed control instruction sent by the control device in response to the moving bed control request is received, the moving bed is controlled to move according to the moving direction and the moving distance of the scanning bed, so that the center of the organ of interest is positioned at the center of the field of view; that is, in this embodiment, the medical image scanning apparatus determines whether to control the movement of the scanning bed according to the instruction of the technician, so that the interactivity of the moving bed control can be improved, and the intelligence of man-machine interaction can be improved.
FIG. 5 is a flow chart of a method for controlling the movement of a scanning bed according to another embodiment. The present embodiment relates to an optional implementation process of the medical image scanning apparatus to perform initial scanning on a detection object to obtain an anatomical image of the detection object in a field of view region, where, based on the foregoing embodiment, as shown in fig. 5, step 202 includes:
step 501, an initial scan sequence is determined.
The initial scanning sequence may be a rapid imaging sequence, the scanning time of the rapid imaging sequence is less than a preset scanning time threshold, and the resolution of the rapid imaging sequence is less than a preset resolution threshold. For example: the initial scan sequence may be a low resolution fast pre-scan sequence with a time of less than 3 s.
It should be noted that, for the image scanning of different parts, the initial scanning sequence may be the same or different; in the case where the initial scan sequences are different, the initial scan sequence may be determined according to the type of the target scan sequence corresponding to the specific scan site.
Of course, the medical image scanning device may also receive the initial scanning sequence sent by the control device, that is, the technician may custom load the initial scanning sequence, so as to rapidly scan the detection object in the moving bed process.
Step 502, according to the initial scanning sequence, the detection object is initially scanned, and an anatomical image of the detection object in a field of view area is obtained.
Optionally, the medical image scanning device performs initial scanning on the detection object based on the determined initial scanning sequence, and reconstructs an anatomical image of the detection object in the field of view according to the acquired scanning data. In this embodiment, a conventional image reconstruction algorithm may be used to reconstruct an image of the scan data to obtain a reconstructed anatomical image, and the process of image reconstruction will not be discussed in detail herein.
In this embodiment, when the medical image scanning apparatus performs rapid scanning on the detection object after the first moving bed, an initial scanning sequence in which the scanning time is smaller than a preset scanning time threshold is determined, and then, according to the initial scanning sequence, the detection object is initially scanned, so as to obtain an anatomical image of the detection object in a field of view region; in this embodiment, in the control process of the fine moving bed, the fast scanning sequence with fast low resolution is loaded to fast scan the detection object, so that not only can the accuracy of the moving bed be improved, but also the speed of the moving bed control can be improved, and further the efficiency of moving bed positioning is improved.
In one embodiment, based on the above embodiments, under the condition that the center of the organ of interest is located at the center of the field of view area by moving the bed twice, then, the object to be detected can be scanned to obtain a target medical image of the object to be detected in the field of view area, and the organ of interest in the target medical image can be located in the center area of the image, so that the requirement of image scanning is met, and the quality of the medical image can be improved. In addition, after the first moving, if it is determined that there is no offset between the center of the organ of interest and the center of the field of view region according to the anatomical image of the object of interest in the field of view region, it is stated that after the first moving, the center of the organ of interest of the object of interest is already located in the center of the field of view region, in this case, no movement of the scanning bed can be performed any more, at this time, the object of interest can be directly scanned, and the target medical image of the object of interest can be obtained.
FIG. 6 is a flow chart of a method for controlling the movement of a scanning bed according to another embodiment. The present embodiment relates to an optional implementation process of the medical image scanning apparatus for adjusting positioning image protocol parameters based on the position information of the organ of interest, where on the basis of the above embodiment, as shown in fig. 6, the method further includes:
In step 601, location information of an organ of interest is determined.
The position information of the organ of interest comprises three-dimensional coordinate information of the organ of interest under a three-dimensional imaging coordinate system of the medical image scanning device, namely X, Y of the organ of interest and position information in the Z coordinate axis direction.
Optionally, after the initial scan of the test object results in an anatomical image of the test object in the field of view, the organ of interest, and the location information of the organ of interest, may be determined from the anatomical image by performing an image analysis on the anatomical image. For example, the anatomical image may be input into a preset neural network, and the organ of interest and the positional information of the organ of interest may be output.
Step 602, adjusting positioning image protocol parameters according to the position information of the organ of interest.
Wherein the scout image protocol is part of a target scan of the test object, and the image obtained based on the scout image protocol scan is capable of optimizing a subsequent clinical scan protocol.
Optionally, in the case of controlling the movement of the scanning bed so that the center of the organ of interest of the detection object is positioned at the center of the field of view region, the medical image scanning apparatus may further determine whether there is a shift in the second direction and the third direction with respect to the center of the field of view region in the center of the organ of interest according to the positional information of the organ of interest, wherein the second direction is a direction perpendicular to the first direction and parallel to the scanning bed, that is, the X-axis direction, and the third direction is a direction perpendicular to the scanning bed, that is, the Y-axis direction. In case it is determined that there is a shift in the center of the organ of interest in the second direction and in the third direction, the localization image protocol parameters, i.e. the relevant parameters in the localization image protocol, may be adjusted according to the location information of the organ of interest.
In this embodiment, the medical image scanning device determines the position information of the organ of interest, and adjusts the positioning image protocol parameter according to the position information of the organ of interest, so that the accuracy of performing positioning image scanning on the detection object can be improved, and the accuracy of performing medical scanning on the detection object can be further improved.
FIG. 7 is a schematic diagram of a complete flow of a method for controlling movement of a scanner bed in one embodiment. As shown in fig. 7, the scanning bed movement control method may include the steps of:
Step 701, controlling the movement of the scanning bed such that the detection object moves with the scanning bed to a field of view region of the medical imaging system.
Step 702, determining an initial scanning sequence, and performing initial scanning on the detection object according to the initial scanning sequence to obtain an anatomical image of the detection object in a field of view region.
At step 703, an image analysis is performed on the anatomical image, from which an organ of interest is determined.
Step 704, determining whether the center of the organ of interest is within a preset range of the center of the field of view region.
Step 705, if the center of the organ of interest is located within the preset range of the center of the field of view region, determining that there is no offset between the center of the organ of interest and the center of the field of view region, and then performing step 709.
In step 706, if the center of the organ of interest is not located within the preset range of the center of the field of view region, it is determined that there is a deviation between the center of the organ of interest and the center of the field of view region.
Step 707, determining a moving direction and a moving distance of the scanning bed, and sending a bed moving control request to the control device.
In step 708, in case a move control instruction sent by the control device in response to the move control request is received, the move of the scan bed is controlled according to the moving direction and the moving distance of the scan bed so that the center of the organ of interest is positioned at the center of the field of view area.
In step 709, the target scan is performed on the detected object, so as to obtain a target medical image of the detected object in the field of view.
Optionally, when receiving a bed shift prohibition instruction sent by the control device in response to the bed shift control request, the medical image scanning device prohibits performing secondary bed shift control on the scanning bed, and at this time, the target scanning can be directly performed on the detection object, so as to obtain a target medical image of the detection object in the field of view region.
The method in the embodiment comprises the steps of rapidly adding magnetic resonance sequence scanning on the basis of a traditional moving bed positioning method, and further carrying out fine moving bed on the basis of an anatomical image obtained by scanning so as to accurately position the center of an organ of interest of a detection object in the center of a field of view area of a medical imaging system; the method can be seamlessly compatible with the existing moving bed positioning scheme, the newly added magnetic resonance measurement and moving bed time are extremely short, the accurate determination of moving bed positioning can be improved, the moving bed positioning speed can be improved, in addition, the difficulty and the requirement of a technician for moving bed positioning operation can be reduced, and the total time consumption of patient scanning is reduced.
In one embodiment, a control flow of another method for controlling the movement of a scanning bed is also provided, which may include the following steps:
Step one, the scanning bed is controlled to move so that the detection object moves to a field of view area of the medical imaging system along with the scanning bed.
Step two, determining an initial scanning sequence, and performing initial scanning on the detection object according to the initial scanning sequence to obtain an anatomical image of the detection object in a field area; illustratively, the anatomical image obtained by the initial scan may be as shown in fig. 8. Wherein the initial scan sequence is a fast-scan low resolution imaging sequence.
And thirdly, performing image analysis on the anatomical image, and determining the organ of interest from the anatomical image. In this embodiment, the organ of interest is set as the heart. The anatomy image is input to a trained neural network to obtain the organ of interest. Further, determining the organ of interest in the anatomical image also includes determining positional information (i.e., coordinate values of X, Y and Z directions) of the organ of interest in X, Y and Z directions, respectively.
And step four, judging whether the center of the organ of interest is positioned in a preset range of the center of the field area along the Z-axis direction. In this embodiment, the Z-axis direction may be the direction of the scanning device system axis.
Step five, if the center of the organ of interest is located in the preset range of the center of the field of view area along the Z-axis direction, determining that no offset exists between the center of the organ of interest and the center of the field of view area, and executing step eight in a jumping manner;
If the center of the organ of interest is not located in the preset range of the center of the field of view area along the Z-axis direction, determining that there is a deviation between the center of the organ of interest and the center of the field of view area, and executing step six.
Step six, determining the moving direction and the moving distance of the scanning bed, and sending a bed moving control request to the control equipment.
And step seven, under the condition that a moving bed control instruction sent by the control equipment in response to the moving bed control request is received, controlling the scanning bed to move along the Z-axis direction according to the moving direction and the moving distance of the scanning bed so as to enable the center of the organ of interest to be positioned at the center of the field of view.
And step eight, judging whether the center of the organ of interest is offset in the X axis and the Y axis according to the position information of the organ of interest obtained in the step three, and adjusting the positioning image protocol parameters according to the position information of the organ of interest in response to the offset of the center of the organ of interest in the X axis and the Y axis. Optionally, the scout image protocol is part of a target scan, and images scanned based on the scout image protocol can optimize subsequent clinical scan protocols. Illustratively, adjusting the scout image protocol parameters may include adjusting the scout image FOV size, center position, direction, and the like. In this embodiment, adjusting the positioning image protocol parameter may be adjusting the position of the center of the FOV in one or more of the sagittal, coronal, and transverse positions. For example, if the coordinate information of the center of the organ of interest on the X-axis and the Y-axis is x= +5cm and y= -8cm, respectively, the center position of the sagittal slice FOV of the localization image is set to x= +5cm and y=0 cm (or-8 cm), the center position of the coronal slice FOV is set to x=0 cm (or +5 cm), y= -8cm, and the center position of the transverse slice FOV is set to x=0 cm and y=0 cm. This arrangement ensures that the three planar sagittal, coronal and transverse scans are all centered in the region of interest.
And step nine, performing target scanning on the detection object to obtain a target medical image of the detection object in the field of view area.
By adopting the method in the embodiment, when the positioning image of the detection object is acquired, the positioning image with high contrast can be obtained only by one breath-hold of the detection object, namely one breath-hold scanning. Exemplary, reference is made to fig. 9 and 10, where fig. 9 is a schematic diagram of a positioning image obtained by performing a first breath hold scan based on a conventional laser lamp positioning method, and a coronal positioning image, a sagittal positioning image, and a transverse positioning image are sequentially performed from left to right; fig. 10 is a schematic diagram of a positioning image obtained by performing a second breath-hold scan based on a conventional laser lamp positioning method, and a coronal positioning image, a sagittal positioning image, and a transverse positioning image are sequentially obtained from left to right.
It follows that conventional scout imaging workflows require two scans (i.e., two breath holds) to acquire scout references for different sections of the heart, where a technician is required to manually adjust the scout protocol position. The automatic positioning workflow of the heart realized by the method can acquire three-plane multi-layer positioning images only by scanning breath at one time, thereby realizing the omnibearing observation of the heart.
Compared with the traditional mode, the method can obtain the positioning image with high contrast ratio, so that the heart size and the range of the front chest and the rear wall can be calculated later, and the center position of the positioning image protocol can be automatically modified, so that the positioning image can be ensured to be cut to the heart all the time, and the fold of the front chest and the rear wall is avoided.
It should be understood that, although the steps in the flowcharts related to the embodiments described above are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.
Based on the same inventive concept, the embodiment of the application also provides a scanning bed movement control device for realizing the scanning bed movement control method. The implementation of the solution provided by the device is similar to that described in the above method, so the specific limitation in the embodiments of the scanning bed movement control device or devices provided below may be referred to the limitation of the scanning bed movement control method hereinabove, and will not be repeated here.
In one embodiment, as shown in FIG. 11, there is provided a scanning bed movement control device adapted for use in a medical imaging system, comprising: a first control module 1101, a scanning module 1102, a judging module 1103 and a second control module 1104, wherein:
A first control module 1101 for controlling the movement of the scanning bed such that the detection object moves with the scanning bed to the field of view of the medical imaging system.
The scanning module 1102 is configured to perform initial scanning on the detection object to obtain an anatomical image of the detection object in a field of view region.
A determining module 1103 is configured to determine an organ of interest from the anatomical image, and determine whether there is a deviation between a center of the organ of interest and a center of the field of view region.
A second control module 1104 for controlling the scan bed movement again such that the center of the organ of interest is located at the center of the field of view area in case there is an offset of the center of the organ of interest from the center of the field of view area.
In one embodiment, the determining module 1103 is specifically configured to determine whether the center of the organ of interest is located within a preset range of the center of the field of view region; in the case that the center of the organ of interest is not located within a preset range of the center of the field of view region, it is determined that there is a shift in the center of the organ of interest from the center of the field of view region.
In one embodiment, the second control module 1104 is specifically configured to determine a movement direction and a movement distance of the scanning bed; controlling the movement of the scanning bed according to the movement direction and the movement distance of the scanning bed so that the center of the organ of interest is positioned at the center of the field of view area; wherein the direction of movement comprises a first direction in and out along an aperture of the magnetic resonance apparatus.
In one embodiment, the second control module 1104 is specifically configured to send a bed shift control request to the control device; in the case of receiving a move-bed control instruction transmitted by the control device in response to the move-bed control request, the move-bed is controlled to move so that the center of the organ of interest is positioned at the center of the field-of-view region, according to the moving direction and the moving distance of the scan-bed.
In one embodiment, the scanning module 1102 is specifically configured to determine an initial scanning sequence; according to the initial scanning sequence, initially scanning the detection object to obtain an anatomical image of the detection object in a field of view region; wherein the initial scan sequence is a rapid imaging sequence.
In one embodiment, the scanning module 1102 is further configured to perform target scanning on the detection object to obtain a target medical image of the detection object in the field of view area when it is determined that the center of the organ of interest is located at the center of the field of view area.
In one embodiment, the apparatus further comprises a determination module and an adjustment module; wherein the determining module is used for determining the position information of the organ of interest; and the adjusting module is used for adjusting the positioning image protocol parameters according to the position information of the organ of interest.
The respective modules in the scanning bed movement control device can be realized in whole or in part by software, hardware and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a magnetic resonance apparatus is provided, the internal structure of which may be as shown in figure 12. The magnetic resonance apparatus includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the magnetic resonance apparatus is adapted to provide computing and control capabilities. The memory of the magnetic resonance apparatus includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of magnetic resonance apparatus may be used to store scan sequence data. The network interface of the magnetic resonance device is used for communicating with an external terminal through a network connection. The computer program is executed by a processor to implement a method of scanning bed movement control.
It will be appreciated by those skilled in the art that the structure shown in FIG. 12 is merely a block diagram of some of the structures associated with the present inventive arrangements and is not limiting of the computer device to which the present inventive arrangements may be applied, and that a particular computer device may include more or fewer components than shown, or may combine some of the components, or have a different arrangement of components.
In an embodiment a magnetic resonance apparatus is provided comprising a memory and a processor, the memory having stored therein a computer program, the processor implementing the steps of the scanning bed movement control method in the respective embodiments described above when the computer program is executed.
In one embodiment, a computer readable storage medium is provided, on which a computer program is stored which, when executed by a processor, implements the steps of the scanning bed movement control method in the various embodiments described above.
In an embodiment a computer program product is provided comprising a computer program which, when executed by a processor, implements the steps of the scanning bed movement control method in the various embodiments described above.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magneto-resistive random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (PHASE CHANGE Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in various forms such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), etc. The databases referred to in the embodiments provided herein may include at least one of a relational database and a non-relational database. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processor referred to in the embodiments provided in the present application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic unit, a data processing logic unit based on quantum computing, or the like, but is not limited thereto.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.
Claims (10)
1. A method of scanning bed movement control for use in a medical imaging system, the method comprising:
Controlling a scanning bed to move so that a detection object moves to a field of view region of the medical imaging system along with the scanning bed;
Initially scanning the detection object to obtain an anatomical image of the detection object in the field of view region;
determining an organ of interest from the anatomical image and determining whether there is a shift in the center of the organ of interest from the center of the field of view region;
If there is an offset between the center of the organ of interest and the center of the field of view region, the scanning bed is controlled again to move so that the center of the organ of interest is positioned at the center of the field of view region.
2. The method of claim 1, wherein said determining if there is an offset of the center of the organ of interest from the center of the field of view region comprises:
Judging whether the center of the organ of interest is located in a preset range of the center of the field of view area;
If not, determining that the center of the organ of interest is offset from the center of the field of view region.
3. The method of claim 1 or 2, wherein the controlling the scanning bed movement again such that the center of the organ of interest is positioned at the center of the field of view region comprises:
determining the moving direction and the moving distance of the scanning bed; wherein the direction of movement comprises a first direction in and out along an aperture of the magnetic resonance apparatus;
The movement of the scanning bed is controlled according to the movement direction and the movement distance of the scanning bed so that the center of the organ of interest is positioned at the center of the field of view area.
4. A method according to claim 3, wherein said controlling the movement of the scanning bed such that the center of the organ of interest is located at the center of the field of view region according to the movement direction and the movement distance of the scanning bed comprises:
sending a bed moving control request to control equipment;
And if a bed moving control instruction sent by the control equipment in response to the bed moving control request is received, controlling the scanning bed to move according to the moving direction and the moving distance of the scanning bed so that the center of the organ of interest is positioned at the center of the field of view area.
5. The method of claim 1, wherein the initially scanning the test object to obtain an anatomical image of the test object in the field of view comprises:
determining an initial scan sequence; wherein the initial scanning sequence is a rapid imaging sequence;
and according to the initial scanning sequence, carrying out initial scanning on the detection object to obtain an anatomical image of the detection object in the field of view region.
6. The method according to claim 1 or 2, characterized in that the method further comprises:
and under the condition that the center of the organ of interest is positioned at the center of the field of view area, performing target scanning on the detection object to obtain a target medical image of the detection object in the field of view area.
7. The method according to claim 1 or 2, characterized in that the method further comprises:
determining location information of the organ of interest;
And adjusting positioning image protocol parameters according to the position information of the organ of interest.
8. A scanning bed movement control device suitable for use in a medical imaging system, the device comprising:
A first control module for controlling a movement of a scanning bed so that a detection object moves to a field of view region of the medical imaging system along with the scanning bed;
the scanning module is used for carrying out initial scanning on the detection object to obtain an anatomical image of the detection object in the field of view area;
a judging module for determining an organ of interest from the anatomical image and judging whether there is a shift between the center of the organ of interest and the center of the field of view region;
And a second control module for controlling the scanning bed to move again so that the center of the organ of interest is positioned at the center of the field of view area if the center of the organ of interest is offset from the center of the field of view area.
9. A magnetic resonance apparatus comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any one of claims 1 to 7 when the computer program is executed.
10. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method of any of claims 1 to 7.
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| CN202211317196.8A Pending CN117958789A (en) | 2022-10-26 | 2022-10-26 | Scanning bed movement control method and device, magnetic resonance equipment and storage medium |
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