CN108968960A - Localization method and magnetic resonance system for magnetic resonance system - Google Patents
Localization method and magnetic resonance system for magnetic resonance system Download PDFInfo
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Abstract
The present invention relates to a kind of localization method and magnetic resonance system for magnetic resonance system, above-mentioned localization method is the following steps are included: obtain the whole body images for the imaging object being carried in supporting table using the second radio-frequency coil；According to the information at position to be scanned, target area corresponding with position to be scanned in whole body images is identified；Obtain relative position information of the target area in supporting table；Position to be scanned is moved to the magnet center of magnetic resonance system by information depending on the relative position.The above-mentioned localization method for magnetic resonance system by obtaining whole body images, and identifies the corresponding region at position to be scanned, and then realizes automatic positioning, not only easy to operate, and avoids carrying out positioning injury caused by patient using laser lamp.
Description
Technical Field
The present invention relates to the field of magnetic resonance, and in particular, to a positioning method for a magnetic resonance system and a magnetic resonance system.
Background
Magnetic Resonance Imaging (MRI) is a biological magnetic spin imaging technique, in which a detector detects a signal generated by an imaging object after radio frequency impulse based on the characteristic of nuclear spin motion in an external magnetic field, processes and converts the signal, and displays the image generated after processing and conversion on a display.
In a traditional magnetic resonance system, a laser lamp is needed to be used for positioning, after a patient and a coil are in place, a sickbed is lifted and moved to the position below the laser lamp, the laser lamp is turned on after the eye of the patient is closed, the sickbed is finely adjusted to enable the center of the coil to be completely aligned with the center of the laser lamp, and then the position to be scanned on the patient is transferred to the center of a magnet based on the position of the center of the laser lamp. The traditional positioning method for the magnetic resonance system has the disadvantages of complicated steps and inconvenient operation, and the laser lamp is used for positioning, which may cause unexpected damage to the eyes of a patient.
Disclosure of Invention
Therefore, it is necessary to provide a positioning method for a magnetic resonance system and a magnetic resonance system, which are simple in positioning steps and easy and convenient to operate, and can effectively avoid accidental injury to eyes of a patient due to positioning by using a laser lamp.
A positioning method for a magnetic resonance system, the magnetic resonance system comprises a support table, a frame, a first radio frequency coil and a second radio frequency coil arranged in the frame, the magnetic resonance system stores the information of the part to be scanned of an imaging object, and the first coil is arranged at the part to be scanned; the method comprises the following steps:
acquiring a whole-body image of the imaging subject carried on the support table using the second radio frequency coil;
identifying a target area corresponding to the part to be scanned in the whole-body image according to the information of the part to be scanned;
acquiring relative position information of the target area on the support platform;
and moving the part to be scanned to the center of a magnet of the magnetic resonance system according to the relative position information.
According to the positioning method for the magnetic resonance system, the whole-body image of the patient is obtained, the corresponding area of the part to be scanned on the whole-body image is identified, and then the automatic positioning operation is realized, so that the operation is simple and convenient, and the damage to the patient, which may be caused by the positioning by using a laser lamp, is avoided.
In one embodiment, after moving the part to be scanned to the center of the magnet of the magnetic resonance system, the method further comprises:
carrying out specific scanning on the part to be scanned by utilizing the first radio frequency coil;
wherein the first radio frequency coil is a local coil and the second radio frequency coil is a body coil.
In one embodiment, the number of the parts to be scanned is multiple, and one first radio frequency coil is placed on each part to be scanned; the method further comprises:
acquiring corresponding relative position information of each part to be scanned on the support platform;
and according to a preset rule, sequentially carrying out corresponding specific scanning on each part to be scanned.
In one embodiment, prior to acquiring a whole-body image of the imaging subject carried on the support table using the second radio frequency coil, the method further comprises:
inputting registration information of the imaging object to generate and save a medical digital imaging and communication file of the imaging object in the magnetic resonance system;
wherein the medical digital imaging and communication file of the imaging subject includes information of a region of the imaging subject to be scanned.
In one embodiment, the acquiring a whole-body image of the imaging subject carried on the support table using the second radio frequency coil includes:
scanning the imaging object for multiple times by using the second radio frequency coil in sequence, wherein each scanning operation obtains an image of the imaging object in a range along the axial direction of the body;
stitching images acquired by the multiple scanning operations to form a whole-body image of the imaging subject.
In one embodiment, the identifying a target region corresponding to the part to be scanned in the whole-body image according to the information of the part to be scanned of the imaging object includes:
performing a recognition operation on a whole-body image of the imaging subject;
and acquiring a target area corresponding to the part to be scanned in the whole-body image according to the information of the part to be scanned of the imaging object and the result of the identification operation.
In one embodiment, the magnetic resonance system is pre-stored with information about the relative position of the support table with respect to the center of the magnet; the acquiring of the relative position information of the target area on the support table includes:
acquiring the relative position relation of the target region on the whole-body image;
and acquiring the relative position information of the target area on the support table according to the relative position information of the support table relative to the center of the magnet.
In one embodiment, the moving the portion to be scanned to the center of the magnet of the magnetic resonance system according to the relative position information includes:
acquiring a moving track of the support table according to the relative position information of the target area on the support table;
and controlling the support table to move along the moving track so as to move the part to be scanned to the center of a magnet of the magnetic resonance system.
In one embodiment, the controlling the moving track of the support table according to the relative position information of the target area on the support table includes:
acquiring the relative distance between the position of the part to be scanned on the support table and the center of the magnet according to the relative position information of the target area on the support table;
and controlling the supporting table to move the relative distance along a preset track.
A magnetic resonance system comprising:
the magnet surrounds and forms a hole cavity with a detection space, and a scanning area is formed inside the hole cavity;
a support table for carrying an imaging subject and capable of moving or moving out of the interior of the bore;
the body coil is coaxially arranged with the magnet, is arranged inside the cavity and is used for receiving radio frequency signals;
a local coil positionable on a surface of the imaging subject to receive magnetic resonance signals;
the processor is in communication connection with the local coil, the body coil and the support table respectively, and is used for controlling the support table to move and controlling the body coil to acquire a whole-body image of an imaging object borne on the support table in the moving process of the support table; identifying a target area corresponding to the part to be scanned in the whole-body image according to the information of the part to be scanned; acquiring relative position information of a target area on a support platform; according to the relative position information, moving the part to be scanned to the center of a magnet of the magnetic resonance system; and controlling the body coil to transmit radio frequency pulses and controlling the local coil to receive magnetic resonance signals generated by the target area.
In one embodiment, the axial length of the imaging subject is greater than the axial aperture of the magnet, and the support stage is moved a plurality of times to acquire a plurality of position scan images, the whole-body image being obtained by stitching the plurality of position scan images.
Drawings
FIG. 1 is a flow diagram of a positioning method for a magnetic resonance system in one embodiment;
figure 2 is a schematic diagram of the structure of a magnetic resonance system in one embodiment;
figure 3 is a schematic diagram of the detailed structure of a magnetic resonance system in one embodiment;
fig. 4 is a detailed flowchart of a positioning method for a magnetic resonance system according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 is a flow chart of a positioning method for a magnetic resonance system in an embodiment, and as shown in fig. 1, a positioning method for a magnetic resonance system may include the following steps:
step S102: a whole-body image of the imaging subject carried on the support table is acquired with the second radio frequency coil.
Specifically, when the magnetic resonance system is used for scanning an imaging object, a part of the patient to be scanned needs to be positioned, the imaging object is borne on the supporting table, the first radio frequency coil is placed at the part of the imaging object to be scanned, and the imaging object is scanned for the whole body through the second radio frequency coil arranged in the rack so as to obtain a whole body image of the patient. Illustratively, the axial length of the second radio frequency coil is smaller than the axial size of the imaging object, so the support table needs to be moved for a plurality of times in the process to acquire a plurality of position scanning images; further, the whole-body image is obtained by stitching the plurality of position-scanned images.
Step S104: and identifying a target area corresponding to the part to be scanned in the whole-body image according to the information of the part to be scanned.
Specifically, the part to be scanned of the imaging subject may be a part detectable by magnetic resonance scanning, such as the head and the chest, and information of the part to be scanned is stored in the magnetic resonance system before the scanning, and a corresponding region on the whole-body image obtained in step S102, that is, a target region of the specific scanning, is identified according to the information.
Step S106: relative position information of the target area on the support table is acquired.
Specifically, the whole-body image of the imaging object has a preset relative positional relationship with respect to the support table, so that the target region on the whole-body image also has a corresponding relative positional relationship with respect to the support table, and the relative positional information of the target region on the support table is acquired based on the positional relationship.
Step S108: according to the relative position information, the part to be scanned is moved to the center of the magnet of the magnetic resonance system.
Specifically, the movement of the support table is controlled based on the relative position information of the target region on the support table acquired in step S106, and the imaging target and the first radio frequency coil are also moved with the support table, and stopped when the portion to be scanned is moved to the center of the magnet disposed in the gantry, at which time the center of the first radio frequency coil is also moved to the center of the magnet. It is noted that the center of the magnet in the present invention corresponds to the central portion of the scan area, also commonly referred to herein as the Field of view (FOV). It will be appreciated that the corresponding portion of the second radio frequency coil may also be excited in response to the above-mentioned information of the relative position of the target region, so as to align the portion to be scanned with the central portion of the scanning region.
According to the positioning method for the magnetic resonance system, the whole-body image of the patient is obtained, the corresponding area of the part to be scanned on the whole-body image is identified, and then the automatic positioning operation is realized, so that the operation is simple and convenient, and the damage to the patient, which may be caused by the positioning by using a laser lamp, is avoided.
Fig. 2 is a schematic diagram of an embodiment of a magnetic resonance system, and as shown in fig. 2, in an embodiment, a magnetic resonance system 500 includes a magnetic resonance gantry 510, a magnet 512, a second rf coil 514, a support 532, a first rf coil 534, an image reconstruction unit 572, a processor 574, and a memory unit 576. Wherein the magnet 512 and the second rf coil 514 are disposed in the magnetic resonance housing 510, a scanning area 516 is formed in the middle of the magnet 512, and the center of the magnet 512 corresponds to the center of the scanning area 516; the support base 532 is mounted on a fixed rail, and the support base 532 can move along the axial direction (parallel to the Z-axis direction in the figure) of the magnetic resonance machine frame 510 into the scanning area 516; the imaging subject 550 is carried on a support 532, and the first radio frequency coil 534 is placed on a portion to be scanned of the imaging subject 550, for example, the first radio frequency coil 534 can be placed on the abdomen of the imaging subject or on the support 532 so that the back, limbs, head, and the like of the imaging subject can contact the first radio frequency coil 534; the image reconstruction unit 572 is configured to generate a whole-body image of the imaging subject 550 and perform fourier transform on the magnetic resonance signal acquired in the magnet center region to obtain an image of a portion to be scanned; the processor 574 is used for identifying the corresponding region of the part to be scanned of the imaging object 550 on the whole body image, controlling the movement of the support 532, and the like, and the information of the part to be scanned of the imaging object 550 is stored in the storage unit 576.
For the magnetic resonance system shown in fig. 2, the above positioning method includes:
step S102: a whole-body image of the imaging subject carried on the support table is acquired with the second radio frequency coil.
Specifically, the imaging subject 550 may be a patient, the support 532 may be a patient table, when performing a magnetic resonance scan on the imaging subject 550, the imaging subject 550 is carried on the support 532, the support 532 is driven by a driving device such as a motor to move along a preset track into the scanning region 516 of the magnetic resonance system, the second radio frequency coil 514 is disposed in the magnetic resonance gantry 510, the whole body of the imaging subject 550 is rapidly scanned from the head, and then the image reconstruction unit 572 processes the scanning result to obtain a whole body image of the imaging subject 550, which may be referred to as a scout image of the imaging subject.
Step S104: and identifying a target area corresponding to the part to be scanned in the whole-body image according to the information of the part to be scanned.
Specifically, the processor 574 reads the information of the part to be scanned of the imaging subject 550 stored in the storage unit 576, recognizes each region of the body of the imaging subject 550 on the whole-body image after acquiring the whole-body image of the imaging subject 550, and then recognizes a region corresponding to the part to be scanned in each region of the body of the imaging subject 550 on the whole-body image through contrast recognition, which is a target region for scanning, and the determined target region can be identified on the whole-body image. Alternatively, the target region may be the head, neck, lung, liver, pelvic, lower limb, or other localized region of the imaging patient.
Step S106: relative position information of the target area on the support table is acquired.
Specifically, the processor 574 acquires the relative position relationship of each region of the body of the imaging subject 550 on the support 532 in the whole-body image, and then acquires the relative position information of the target region on the support 532 according to the relative position relationship of the target region in the whole-body image, wherein the relative position information may be coordinate information or the like.
Step S108: according to the relative position information, the part to be scanned is moved to the center of the magnet of the magnetic resonance system.
Specifically, the processor 574 performs calculation processing on the relative position information of the target region on the support 532, and then controls the support 532 to move according to the processing result, so that the portion to be scanned of the imaging object 550 moves to the center of the magnet 512, and the center of the first rf coil 534 also moves to the center of the magnet 512, and then prepares to make the first rf coil 534 perform specific scanning on the portion to be scanned of the imaging object 550. It should be noted that, since the positional relationship between the center of the magnet and the patient bed is fixed, and the positional relationship between the imaging region and the patient bed is also fixed, in order to ensure that the center of the magnet 512 of the present invention generally coincides with the center of the imaging region (FOV), the positional relationship between the center of the magnet 512 and the center of the imaging region can be determined according to the whole-body image of step S102 before the specific scan of the to-be-scanned portion of the imaging subject 550 is performed by using the first rf coil 534, and when the two do not coincide, the center of the magnet 512 is adjusted to generally align with the center of the imaging region (FOV).
In one embodiment, after step S108, the method further includes:
the first radio frequency coil 534 is used for specific scanning of the part to be scanned.
Specifically, after the part to be scanned moves to the center of the magnet 512, the first rf coil 534 performs specific scanning on the corresponding part to be scanned, the specific scanning is different from the whole-body fast scanning in step S102, the whole-body fast scanning has a large imaging range and a high speed, and is mainly used for obtaining a positioning image of the body contour of the patient, but the definition is low. The specific scan is directed to the local region to be scanned, the imaging range is smaller but the resolution is higher, and the difference between the two scans is determined by the characteristics of the first RF coil 534 and the second RF coil 514. The result of the specific scan is processed by the image reconstruction unit 574 to generate a specific scan image of the portion to be scanned of the imaging subject 550.
In one embodiment, when the number of the parts to be scanned is plural and each part to be scanned is disposed with a first rf coil 534, the method further comprises:
the corresponding relative position information of each part to be scanned on the support 532 is obtained. And according to a preset rule, carrying out corresponding specific scanning on each part to be scanned in sequence.
Specifically, the processor 574 sequentially obtains relative position information of the target area on the support 532 corresponding to each of the multiple parts to be scanned, where the relative position information may be coordinate information, and the preset rule is to determine a scanning order for the multiple parts to be scanned according to the relative position information, and the scanning order may be determined by automatic selection after calculation by the system or manual selection by an operator.
In one embodiment, before step S102, the method further includes:
registration information for the imaging subject 550 is entered and a medical digital imaging and communications file for the imaging subject 550 is generated and stored in the magnetic resonance system 500. Wherein the medical digital imaging and communications file of the imaging subject 550 includes information of the portion of the imaging subject 550 to be scanned.
Specifically, the imaging subject 550 is registered with information before performing magnetic resonance scanning, a region to be scanned is determined, information of the region to be scanned is stored in a digital imaging and communication in Medicine (DICOM), which is an international standard for medical images and related information (ISO 12052), a format of medical images for data exchange is defined, the quality of which can meet clinical requirements, and the DICOM file is stored in the storage unit 576 of the magnetic resonance system 500, and when performing magnetic resonance scanning, the processor 574 reads the DICOM file of the imaging subject 550 stored in the storage unit 576, thereby obtaining information of the region to be scanned of the imaging subject 550.
In one embodiment, the step S102 includes:
the imaging subject 550 is sequentially scanned a plurality of times by the second radio frequency coil 514, and each scanning operation obtains a range of images of the imaging subject 550 along the axial direction of the body. Images acquired from multiple scanning operations are stitched to form a whole-body image of the imaging subject 550.
Specifically, the axial direction of the body of the imaging subject 550 is the same as the axial direction of the magnetic resonance gantry 510, the number of scans is determined according to the scanning range of the second rf coil 514 and the length of the body of the imaging subject 550, the support 532 moves a certain distance along the axial direction (parallel to the Z-axis direction in the figure) each time according to the number of scans so that the body of the imaging subject 550 passes through the second rf coil 514, and the second rf coil 514 scans the imaging subject 550 once after moving a certain distance to obtain a corresponding image.
In one embodiment, the step S104 includes:
performing a recognition operation on the whole-body image of the imaging subject 550; a target region corresponding to the portion to be scanned in the whole-body image is acquired based on the information of the portion to be scanned of the imaging object 550 and the result of the above-described recognition operation.
In one embodiment, the magnetic resonance system 500 is pre-stored with the relative position information of the support 532 with respect to the center of the magnet 512, and the step S106 includes:
and acquiring the relative position relation of the target region on the whole-body image. Relative position information of the target region on the support 532 is acquired based on the relative position information of the support 532 with respect to the center of the magnet 512.
In one embodiment, the step S108 includes:
the movement locus of the support 532 is obtained based on the relative position information of the target region on the support 532. The support 532 is controlled to move along the moving track to move the part to be scanned to the center of the magnet 512 of the magnetic resonance system 500.
In one embodiment, the obtaining of the moving track of the support 532 according to the relative position information of the target area on the support 532 includes:
the relative distance between the position of the part to be scanned on the support 532 and the center of the magnet 512 is obtained from the relative position information of the target region on the support 532. The support 532 is controlled to move the above-mentioned relative distance along a predetermined trajectory.
In one embodiment, the first radio frequency coil 534 may be a local coil and the second radio frequency coil 514 may be a body coil, as described above for the positioning method of the magnetic resonance system.
Specifically, the first rf Coil is an rf Coil that can be fixed or placed on the portion to be scanned of the imaging subject 550 for performing a specific scan, such as a local Coil, and the second rf Coil is an rf Coil with a larger scanning range, such as a Volume Transmit Coil (VTC), disposed in the magnetic resonance gantry 510.
In one embodiment, the following steps are further included after step S108:
the size of the imaging region is determined based on the identified target region.
Specifically, one or more feature points capable of characterizing the shape of an imaging area (FOV) may be determined according to the shape of the identified target area, such as the vertex of a triangular FOV, the end point and the center of gravity corresponding to the radius of a circular FOV, and the like; determining a coil unit capable of covering the characteristic point according to the characteristic point capable of representing the shape of the FOV; and connecting the corresponding coil units to obtain an effective imaging area. This operation can be automatically implemented by the system, reducing the effects of human interference, while selecting the optimal FOV area relative to the target area to improve the accuracy of patient positioning.
In one implementation, the above method may further include the steps of:
selecting a diagnosis application corresponding to the target area;
one or more scan sequences are automatically selected in a protocol list of the system based on the diagnostic application and the FOV area, and the one or more sequences are activated for an imaging acquisition of the target area.
Specifically, the target region may be a tissue organ of each part of the human body, for example, the target region may be a head, the scanning range is from a fossa basalis to a parietal fossa, and the corresponding sequence is selected from one or more of a T1 free water suppression sequence, a T1 weighted sequence, a T2 free water suppression sequence, or a T2 weighted sequence. In another embodiment, the target region is a cardiac region, and the corresponding sequence is one or more of a T1W fast gradient with inversion sequence, a cardiac cine imaging sequence, an inversion echo fat suppression sequence, and a contrast enhanced magnetic resonance angiography sequence.
As shown in fig. 3, in a specific embodiment, a magnetic resonance system 600 includes a magnetic resonance gantry 610, a main magnet 612, a VTC coil 614, a gradient coil 618, a support table or couch 632, a local coil 634, an image reconstruction unit 672, a processor 674, and auxiliary devices, among others, wherein the auxiliary devices may include a drive 636, a pulse control unit 676, a pulse generation unit 678, a switch control unit 680, a radio frequency receiving unit 682, a gradient signal generation unit 684, gradient amplifiers (685, 686, 687), a display unit 688, an input-output device 690, a storage unit 692, a communication port 694, a communication bus 696, and others.
The main magnet 612, VTC coils 614, and gradient coils 618 are disposed within the magnetic resonance gantry 610. The main magnet 612 may be formed of superconducting coils for generating a main magnetic field, and in some cases, may be a permanent magnet. The main magnet 612 may be configured to generate a main magnetic field strength of 0.1 tesla, 0.4 tesla, 0.8 tesla, 1.6 tesla, 2.0 tesla, or higher, and a scan region 616 is disposed in the middle of the main magnet 612. A driving device 636 is disposed under the sickbed 632, the driving device 636 can drive the sickbed 632 to move up and down and move on a preset track along the axial direction of the magnetic resonance gantry 610, during magnetic resonance imaging, the imaging object 650 is carried by the sickbed 632, the local coil 634 is disposed on a portion to be scanned of the imaging object 650, and the imaging object 650 is moved into the scanning area 616 with uniform magnetic field distribution of the main magnetic field along with the movement of the sickbed 632. The z-direction of the spatial coordinate system (i.e., the coordinate system of the apparatus) is set to be the same as the axial direction of the magnetic resonance system gantry 610, the body length direction of the imaging subject 650 is generally aligned with the z-direction for imaging, the horizontal plane of the magnetic resonance system 600 is set to be an xz-plane, the x-direction is perpendicular to the z-direction, and the y-direction is perpendicular to both the x-direction and the z-direction.
The gradient coils 618 may be used to spatially encode the radio frequency signals in magnetic resonance imaging. The pulse control unit 676 controls the gradient signal generation unit 684 to generate gradient signals, which are generally divided into three mutually orthogonal directions: in the x, y and z directions, gradient signals in different directions are amplified by gradient amplifiers (685, 686, 687) and emitted by the gradient coil 618 to generate a gradient magnetic field in the scan region 616.
The pulse control unit 676 controls the rf pulse generating unit 678 to generate rf pulses, which are amplified by the amplifier, passed through the switch control unit 680, and finally emitted by the VTC coil 614 or the local coil 634 to perform rf excitation on the imaging subject 650. The imaging subject 650 generates corresponding radio frequency signals from resonance upon radio frequency excitation. When receiving the radio frequency signals generated by the imaging subject 650 according to the excitation, the radio frequency signals may be received by the VTC coil 614 or the local coil 634, there may be a plurality of radio frequency receiving links, and the radio frequency signals are sent to the radio frequency receiving unit 682 and then further sent to the image reconstruction unit 672 for image reconstruction, so as to form a magnetic resonance image.
The pulse control unit 676, the image reconstruction unit 672, the processor 674, the display unit 688, the input/output device 690, the storage unit 692 and the communication port 694 may be arranged for data transfer via a communication bus 696 for controlling the magnetic resonance imaging procedure. The processor 674 may be composed of one or more processors, among others. The display unit 688 may be a display provided to a user for displaying images. The input/output device 690 may be a keyboard, mouse, control box, or the like, which supports input/output of the corresponding data stream. Storage unit 692 may be Read Only Memory (ROM), Random Access Memory (RAM), a hard disk, or the like, and storage unit 692 may be used to store various data files for processing and/or communication purposes, as well as possible program instructions for execution by processor 674. The communication port 694 can enable communication with other components such as: and the external equipment, the image acquisition equipment, the database, the external storage, the image processing workstation and the like are in data communication.
The magnetic resonance system 600 does not contain a laser lamp, does not use laser and other positioning, omits the step of closing the eyes of the patient, and avoids the accidental injury of the laser lamp to the patient. In addition, the positioning operation of the magnetic resonance system 600 does not need to additionally increase a camera for acquiring the positioning image on the system, but the positioning image is acquired by primarily scanning the body coil of the magnetic resonance system, so that an additional device is avoided from being added on the system, the complexity of the system is effectively simplified, the cost is reduced, and compared with the positioning image acquired by other external equipment, the positioning image acquired by the body coil has higher positioning accuracy.
As shown in fig. 4, for the magnetic resonance system 600 in the above embodiment, in an embodiment, a positioning method for the magnetic resonance system specifically includes the following steps:
step S202: and recording the registration information of the imaging object, generating a DICOM file and storing the DICOM file in the magnetic resonance system.
Specifically, the imaging object 650 may be a human body, an animal body, a local organ, or the like, a physical examination is performed before the imaging object 650 is subjected to MR scanning, various physiological parameters are examined, it is determined that the imaging object 650 may be subjected to MR scanning, a portion of the imaging object 650 that needs to be subjected to MR scanning is determined, registration information is recorded, and a DICOM file storing the registration information of the imaging object 650 is generated, where the DICOM file includes information of a portion tag of the imaging object 650 that needs to be scanned, where the portion that needs to be scanned may be one or more, for example, in this embodiment, the portion of the imaging object to be scanned may be a chest cavity. This DICOM file is saved from the communication port 694 to the storage unit 692 of the magnetic resonance system 600 via the communication bus 696, for example, as a database or as an external storage.
Step S204: the imaging subject and the local coil are placed at specified positions on the patient bed.
Specifically, the imaging subject 650 is carried on a designated position of the patient bed 632, the local coil 634 is placed on the imaging subject 650, the local coil 634 may be placed on the head, the torso, and the limbs of the imaging subject 650, depending on the region to be scanned of the imaging subject 650, for example, the local coil 634 may be placed on the chest of the imaging subject 650 in this embodiment, and if the imaging subject 650 needs to scan a plurality of regions, a plurality of local coils of corresponding regions may be simultaneously provided. The imaging subject 650 and the local coil 634 should be securely mounted on the patient couch 632, not subject to displacement during scanning, and the imaging subject 650 should be careful not to carry metal objects on the examination prior to performing the MR scan.
Step S206: and pressing a one-key scanning key to perform quick whole-body scanning on the imaging object from the head through the VTC coil.
Specifically, an operator presses a scan key, the magnetic resonance system starts to operate, the patient bed 632 carries the imaging object 650 and the local coil 634 and is automatically lifted to a position suitable for MR scanning, the driving device 636 drives the patient bed 632 to move towards the magnetic resonance gantry along a preset track in the z direction, so that the imaging object 650 enters the scanning area 616, the VTC coil 614 starts to perform fast whole-body scanning on the imaging object 650 from the head, and after a plurality of scans, the whole-body scanning of the imaging object 650 is completed to obtain a plurality of corresponding local scanning images, the number of scans is determined according to the scanning range of the VTC coil 614 and the length of the imaging object 650, for example, the scanning range of the VTC coil 614 is 50cm, and the length of the imaging object 650 is 180cm, and then four scans are needed to complete the whole-body scanning of the imaging object 650, so as to obtain four local images of the imaging object 650.
Step S208: splicing the images generated by the rapid scanning to form a whole-body image of an imaging object;
specifically, the image reconstruction unit 672 identifies and processes the plurality of local scan images obtained by scanning in step S208, and combines with a correlation algorithm to splice the plurality of local scan images to form a complete whole-body image of the imaging object 650, wherein all main parts of the human body detectable by general magnetic resonance imaging can be observed on the whole-body image, and the whole-body image can be displayed to the operator on the display unit 688.
Optionally, the step of image stitching may comprise: setting the total number of beds of the images to be acquired according to the whole-body image, wherein the total number of beds is 4, and the total number of beds is a first bed, a second bed, a third bed and a fourth bed; setting an image area of a first bed, setting the thickness of each bed and image overlapping information among the beds, generating image areas of a second bed, a third bed and a fourth bed according to the total number of beds of images to be acquired, the image area of the first bed, the thickness of each image and the image overlapping information among the images, and displaying the image areas of all the beds simultaneously; setting the measurement parameters of the first bed, and setting the measurement parameters of the second bed, the third bed and the fourth bed to be consistent with the measurement parameters of the first bed; and respectively splicing the first bed, the second bed, the third bed and the fourth bed along the sagittal position direction and the coronal position direction to obtain a whole body image.
Step S210: and reading the DICOM file to acquire the information of the part to be scanned.
Specifically, the processor 674 reads the DICOM file of the imaging object 650 stored in the storage unit 692 in step S202, and acquires the information of the part to be scanned when the imaging object 650 registers information from the DICOM file, where the information is a part tag to be scanned by the imaging object 650, and the number of the part tags to be scanned may be one or more.
Step S212: the whole-body image is subjected to a recognition operation, thereby determining a target region corresponding to the portion to be scanned.
Specifically, the processor 674 performs a recognition operation on the whole-body image of the imaging subject 650, recognizes various parts of the human body on the whole-body image, and recognizes a target region corresponding to the part label to be scanned on the whole-body image in step S210 according to the parts and in combination with an algorithm, which may be marked on the whole-body image displayed on the display unit 688. If a plurality of part labels to be scanned are recorded in the DICOM file, after all corresponding target areas are identified, the processor 674 can calculate the scanning mode such as the shortest moving distance or the fastest scanning speed to automatically select the scanning sequence, and the operator can also manually select the scanning sequence of the target areas.
Step S214: and acquiring the relative position relation of the target region on the whole-body image so as to acquire the relative position information of the target region on the sickbed.
Specifically, the magnetic resonance system 600 prestores relative position information of the patient bed 632 with respect to the center of the main magnet 612, acquires a relative position relationship of the target region on the whole-body image after identifying the target region of the to-be-scanned region of the imaging object 650 on the whole-body image, and acquires the relative position information of the target region on the patient bed 632 according to the relative position relationship and the relative position information of the patient bed 632 with respect to the center of the main magnet 612, where the relative position information may be information that can be identified and processed by the processor 674, such as coordinate information.
Step S216: and acquiring the relative distance between the position of the part to be scanned on the sickbed and the center of the magnet, and controlling the sickbed to move along the preset track by the relative distance.
Specifically, according to the relative position information of the target region on the patient bed 632 acquired in step S214, the processor 674 calculates the distance between the current position of the to-be-scanned region of the imaging object 650 and the center of the main magnet 612, and then controls the driving device 636 to drive the patient bed 632 to move along the preset track in the z direction by the relative distance.
Step S218: and moving the part to be scanned to the center of the magnet, and starting to perform specific scanning on the part to be scanned.
Specifically, after the patient bed 632 moves, the portion to be scanned moves to the center of the main magnet 612, the local coil 634 starts to perform a specific scan on the portion to be scanned of the imaging object 650, the image reconstruction unit 672 receives the scan signal to perform image reconstruction, and the formed image of the specific scan is stored in the storage unit 692 or displayed on the display unit 688 through the communication bus 696. When there are a plurality of corresponding portions to be scanned, the operations of step S214 to step S218 are automatically repeated in turn in the scanning order determined in step S212.
There is also provided in the present application a computer device, wherein the computer device comprises a memory, a processor and a computer program stored on the memory and executable on the processor, and the processor when executing the program is operable to perform the following steps: acquiring a whole-body image of an imaging subject carried on the support table by using a second radio frequency coil; identifying a target area corresponding to the part to be scanned in the whole-body image according to the information of the part to be scanned; acquiring relative position information of a target area on a support platform; according to the relative position information, the part to be scanned is moved to the center of the magnet of the magnetic resonance system.
In another embodiment, the present application further provides a computer readable storage medium having a computer program stored thereon, which when executed by a processor, causes the processor to perform the steps of: acquiring a whole-body image of an imaging subject carried on the support table by using a second radio frequency coil; identifying a target area corresponding to the part to be scanned in the whole-body image according to the information of the part to be scanned; acquiring relative position information of a target area on a support platform; according to the relative position information, the part to be scanned is moved to the center of the magnet of the magnetic resonance system.
For the above limitations of the computer-readable storage medium and the computer device, reference may be made to the above specific limitations of the method, which are not described herein again. It should be noted that, as one of ordinary skill in the art can appreciate, all or part of the processes of the above methods may be implemented by instructing related hardware through a computer program, and the program may be stored in a computer-readable storage medium; the above described programs, when executed, may comprise the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM) or a Random Access Memory (RAM).
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A positioning method for a magnetic resonance system is characterized in that the magnetic resonance system comprises a support table, a frame, a first radio frequency coil and a second radio frequency coil arranged in the frame, wherein the magnetic resonance system stores information of a part to be scanned of an imaging object, and the first coil is arranged at the part to be scanned; the method comprises the following steps:
acquiring a whole-body image of the imaging subject carried on the support table using the second radio frequency coil;
identifying a target area corresponding to the part to be scanned in the whole-body image according to the information of the part to be scanned;
acquiring relative position information of the target area on the support platform;
and moving the part to be scanned to the center of a magnet of the magnetic resonance system according to the relative position information.
2. The positioning method for a magnetic resonance system according to claim 1, wherein after moving the portion to be scanned to a magnet center of the magnetic resonance system, the method further comprises:
carrying out specific scanning on the part to be scanned by utilizing the first radio frequency coil;
wherein the first radio frequency coil is a local coil and the second radio frequency coil is a body coil.
3. The positioning method for the magnetic resonance system according to claim 2, wherein the number of the parts to be scanned is plural, and one first radio frequency coil is placed on each of the parts to be scanned; the method further comprises:
acquiring corresponding relative position information of each part to be scanned on the support platform;
and according to a preset rule, sequentially carrying out corresponding specific scanning on each part to be scanned.
4. The localization method for a magnetic resonance system according to claim 1, wherein before acquiring a whole-body image of the imaging subject carried on the support table with the second radio frequency coil, the method further comprises:
inputting registration information of the imaging object to generate and save a medical digital imaging and communication file of the imaging object in the magnetic resonance system;
wherein the medical digital imaging and communication file of the imaging subject includes information of a region of the imaging subject to be scanned.
5. The localization method for a magnetic resonance system according to claim 1, wherein the acquiring a whole-body image of the imaging subject carried on the support table with the second radio frequency coil comprises:
scanning the imaging object for multiple times by using the second radio frequency coil in sequence, wherein each scanning operation obtains an image of the imaging object in a range along the axial direction of the body;
stitching images acquired by the multiple scanning operations to form a whole-body image of the imaging subject.
6. The localization method for a magnetic resonance system according to claim 1,
the identifying a target region corresponding to the part to be scanned in the whole-body image according to the information of the part to be scanned of the imaging object comprises:
performing a recognition operation on a whole-body image of the imaging subject;
acquiring a target area corresponding to the part to be scanned in the whole-body image according to the information of the part to be scanned of the imaging object and the result of the identification operation; or,
the magnetic resonance system is pre-stored with the relative position information of the support table relative to the center of the magnet; the acquiring of the relative position information of the target area on the support table includes:
acquiring the relative position relation of the target region on the whole-body image;
and acquiring the relative position information of the target area on the support table according to the relative position information of the support table relative to the center of the magnet.
7. The positioning method for the magnetic resonance system according to claim 1, wherein the moving the portion to be scanned to the center of the magnet of the magnetic resonance system according to the relative position information comprises:
acquiring a moving track of the support table according to the relative position information of the target area on the support table;
and controlling the support table to move along the moving track so as to move the part to be scanned to the center of a magnet of the magnetic resonance system.
8. The positioning method for a magnetic resonance system according to claim 7, wherein the controlling the moving track of the support table according to the relative position information of the target region on the support table comprises:
acquiring the relative distance between the position of the part to be scanned on the support table and the center of the magnet according to the relative position information of the target area on the support table;
and controlling the supporting table to move the relative distance along a preset track.
9. A magnetic resonance system, comprising:
the magnet surrounds and forms a hole cavity with a detection space, and a scanning area is formed inside the hole cavity;
a support table for carrying an imaging subject and capable of moving or moving out of the interior of the bore;
the body coil is coaxially arranged with the magnet, is arranged inside the cavity and is used for receiving radio frequency signals;
a local coil positionable on a surface of the imaging subject to receive magnetic resonance signals;
the processor is in communication connection with the local coil, the body coil and the support table respectively, and is used for controlling the support table to move and controlling the body coil to acquire a whole-body image of an imaging object borne on the support table in the moving process of the support table; identifying a target area corresponding to the part to be scanned in the whole-body image according to the information of the part to be scanned; acquiring relative position information of a target area on a support platform; according to the relative position information, moving the part to be scanned to the center of a magnet of the magnetic resonance system; and controlling the body coil to transmit radio frequency pulses and controlling the local coil to receive magnetic resonance signals generated by the target area.
10. The system of claim 9, wherein the imaging subject has an axial length greater than an axial bore of the magnet, the support stage moves a plurality of times to acquire a plurality of position scan images, and the whole-body image is obtained by stitching the plurality of position scan images.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109567843A (en) * | 2019-02-02 | 2019-04-05 | 上海联影医疗科技有限公司 | A kind of image scanning automatic positioning method, device, equipment and medium |
| CN111462885A (en) * | 2020-03-30 | 2020-07-28 | 上海联影医疗科技有限公司 | Scanning parameter determination method, device, equipment and storage medium of scanning system |
| CN112816927A (en) * | 2020-12-30 | 2021-05-18 | 深圳市联影高端医疗装备创新研究院 | Magnetic resonance apparatus, scan assisting structure, and scan assisting pad |
| CN112834972A (en) * | 2019-11-25 | 2021-05-25 | 通用电气精准医疗有限责任公司 | Pre-scan control system and method for magnetic resonance imaging system |
| CN112924911A (en) * | 2021-01-25 | 2021-06-08 | 上海东软医疗科技有限公司 | Method and device for acquiring coil information in magnetic resonance system |
| CN113645307A (en) * | 2021-08-18 | 2021-11-12 | 中国人民解放军东部战区总医院 | Network sharing positioning database system of nuclear magnetic resonance system and establishing and using method |
| CN115919285A (en) * | 2023-02-28 | 2023-04-07 | 山东奥新医疗科技有限公司 | Nuclear magnetic resonance positioning method, device, equipment and storage medium |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1476812A (en) * | 2002-07-18 | 2004-02-25 | Patient-locating method and device for medical diagnostic or therapeutic equipment | |
| CN1926444A (en) * | 2004-03-01 | 2007-03-07 | 皇家飞利浦电子股份有限公司 | All in one plan scan imaging for optimization of acquisition parameters |
| US20120220855A1 (en) * | 2011-02-24 | 2012-08-30 | Siemens Corporation | Method and System for MR Scan Range Planning |
| CN104000589A (en) * | 2013-02-27 | 2014-08-27 | 西门子(深圳)磁共振有限公司 | Positioning method and positioning device of magnetic resonance imaging system |
| CN106600619A (en) * | 2016-12-30 | 2017-04-26 | 上海联影医疗科技有限公司 | Data processing method and data processing device |
| CN107669273A (en) * | 2017-11-07 | 2018-02-09 | 上海联影医疗科技有限公司 | Magnetic resonance equipment scanning system, scan method and computer-readable recording medium |
-
2018
- 2018-06-27 CN CN201810677641.9A patent/CN108968960A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1476812A (en) * | 2002-07-18 | 2004-02-25 | Patient-locating method and device for medical diagnostic or therapeutic equipment | |
| CN1926444A (en) * | 2004-03-01 | 2007-03-07 | 皇家飞利浦电子股份有限公司 | All in one plan scan imaging for optimization of acquisition parameters |
| US20120220855A1 (en) * | 2011-02-24 | 2012-08-30 | Siemens Corporation | Method and System for MR Scan Range Planning |
| CN104000589A (en) * | 2013-02-27 | 2014-08-27 | 西门子(深圳)磁共振有限公司 | Positioning method and positioning device of magnetic resonance imaging system |
| CN106600619A (en) * | 2016-12-30 | 2017-04-26 | 上海联影医疗科技有限公司 | Data processing method and data processing device |
| CN107669273A (en) * | 2017-11-07 | 2018-02-09 | 上海联影医疗科技有限公司 | Magnetic resonance equipment scanning system, scan method and computer-readable recording medium |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109567843A (en) * | 2019-02-02 | 2019-04-05 | 上海联影医疗科技有限公司 | A kind of image scanning automatic positioning method, device, equipment and medium |
| CN109567843B (en) * | 2019-02-02 | 2021-04-06 | 上海联影医疗科技股份有限公司 | Imaging scanning automatic positioning method, device, equipment and medium |
| CN112834972A (en) * | 2019-11-25 | 2021-05-25 | 通用电气精准医疗有限责任公司 | Pre-scan control system and method for magnetic resonance imaging system |
| CN111462885A (en) * | 2020-03-30 | 2020-07-28 | 上海联影医疗科技有限公司 | Scanning parameter determination method, device, equipment and storage medium of scanning system |
| CN111462885B (en) * | 2020-03-30 | 2023-11-14 | 上海联影医疗科技股份有限公司 | Method, device, equipment and storage medium for determining scanning parameters of scanning system |
| CN112816927A (en) * | 2020-12-30 | 2021-05-18 | 深圳市联影高端医疗装备创新研究院 | Magnetic resonance apparatus, scan assisting structure, and scan assisting pad |
| CN112924911A (en) * | 2021-01-25 | 2021-06-08 | 上海东软医疗科技有限公司 | Method and device for acquiring coil information in magnetic resonance system |
| CN113645307A (en) * | 2021-08-18 | 2021-11-12 | 中国人民解放军东部战区总医院 | Network sharing positioning database system of nuclear magnetic resonance system and establishing and using method |
| CN115919285A (en) * | 2023-02-28 | 2023-04-07 | 山东奥新医疗科技有限公司 | Nuclear magnetic resonance positioning method, device, equipment and storage medium |
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