CN110693513A - Control method, system and storage medium for multi-modal medical system - Google Patents
Control method, system and storage medium for multi-modal medical system Download PDFInfo
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Abstract
The invention discloses a control method, a system and a readable storage medium of a multi-modal medical system, wherein the system is a medical image and/or treatment system; adjusting parameters of the initial target area to obtain a first target area of a first modal system; and the first target area is used as the image and/or treatment target area of the first modality system, and the second target area is used as the image and/or treatment target area of the second modality system, so that flexible image scanning and/or treatment planning is made for the patient.
Description
Technical Field
The present invention relates to the technical field of medical imaging and/or therapy systems, and more particularly, to a method, system and storage medium for positioning a medical imaging and/or therapy system.
Background
In the prior art, when medical image scanning is performed, once a scanning plan is made, the position of a sickbed cannot be changed in the scanning process. However, the determined whole-body scan plan cannot always ensure that the center position of the bed is the center position of the organ of interest, and when the multi-medical image scanning device of the bed performs synchronous scan acquisition, the bed is limited to the immovable bed position, and the scanning device with a small field of view (FOV) cannot always cover the whole organ.
As an obvious example, when performing PET (Positron emission Tomography, PET)/MR (Magnetic Resonance imaging, MR) body scanning, the scanning fields of PET and MR are set in association, and a PET/MR system in the prior art states in its product manual that its product "the subsequent MR protocol will be incorporated into one protocol block with the AC + PET protocol by copying the reference. All protocols of this protocol block have the same isocenter. "still another PET/MR system, its product manual states its products" the PET/MR system cannot move its platform while scanning simultaneously. When the PET/MR system scans simultaneously, the MR scan is a fixed scan of the center position of the patient's bed (MRscans simultaneous with PET multiple not use table to move. all simultaneous MR scans are in the center of the bed to the heart). When synchronous MR acquisition is performed at a certain bed, the PET scanning field of view is large, and can completely cover a complete organ, but is limited by the bed position which cannot be moved, and the MR scanning set in association with the PET scanning field of view often cannot cover the complete organ (for example, the upper edge of the liver and the kidney is truncated).
Disclosure of Invention
The invention provides a control method, a system and a storage medium of a multi-modal medical system, which are applied to the multi-modal medical imaging system and/or the multi-modal medical treatment system, and can solve the problem that when a plurality of medical imaging and/or treatment systems simultaneously image and/or treat, certain systems with smaller target areas can not cover the whole viscera under the condition that the bed position can not move.
In a first aspect, a method of controlling a multi-modality medical system, the system including a medical imaging and/or therapy system, the method comprising:
setting parameters of a second target area of a second modal system and parameters of an initial target area of a first modal system to be the same parameter values;
wherein the second target area is an image or treatment target area of the second modality system;
adjusting parameters of the initial target area to obtain a first target area of a first modal system;
the first target area is used as an image or treatment target area of the first modality system.
Setting the parameter of the second target area and the parameter of the initial target area to be the same parameter value may be performed by:
copying the parameters of the second target area as the parameters of the initial target area; or
Setting the parameters of the second target area and the parameters of the initial target area as the same parameter values;
the parameters of the initial target area are copied as the parameters of the second target area.
In one embodiment, the parameters of the second target area and the initial target area include:
at least one of a center position parameter, a center line position parameter, a direction parameter, an angle parameter, a boundary parameter, and a size parameter.
Setting the parameter of the second target region of the second modality system and the parameter of the initial target region of the first modality system to be the same parameter value includes:
copying at least one of a central position parameter, a central line position parameter, a target area direction parameter and a target area angle parameter of the second target area as a corresponding parameter of the initial target area; or
Setting at least one of a central position parameter, a central line position parameter, a target area direction parameter and a target area angle parameter of the second target area and the initial target area as the same parameter value; or
At least one of the central position parameter, the central line position parameter, the target area direction parameter and the target area angle parameter of the initial target area is copied as a corresponding parameter of the second target area.
In one embodiment, adjusting the parameters of the initial target region includes adjusting according to the region of interest.
In one embodiment, adjusting the initial target region according to the region of interest includes:
and adjusting the initial target area to obtain a first target area, so that the first target area completely covers the interested area.
In one embodiment, adjusting the parameter of the initial target area according to the region of interest to obtain the first target area includes at least one of:
adjusting the central position parameter of the initial target area according to the information of the interest area;
adjusting the center line position parameter of the initial target area according to the information of the interest area;
adjusting the direction parameters of the initial target area according to the information of the interested area;
adjusting the angle parameter of the initial target area according to the angle of the interested area;
adjusting the boundary parameters of the initial target area according to the boundary of the region of interest;
and adjusting the size parameter of the initial target area according to the size of the region of interest.
In one embodiment, adjusting the center position parameter of the initial target region comprises copying the center position parameter of the region of interest as the center position parameter of the first target region.
In one embodiment, adjusting the centerline position parameter of the initial target region comprises copying the centerline position parameter of the region of interest as the centerline position parameter of the first target region.
In one embodiment, adjusting the angle parameter of the initial target region comprises replicating the angle parameter of the region of interest as the angle parameter of the first target region.
In one embodiment, adjusting the boundary parameters of the initial target region comprises copying the boundary parameters of the region of interest as the boundary parameters of the first target region.
In one embodiment, the first modality system performs single-bed medical imaging or treatment with the first target area as the imaging or treatment target area and the second modality system performs single-bed medical imaging or treatment with the second target area as the imaging or treatment target area.
In one embodiment, the first modality system and the second modality system are medical imaging systems;
and fusing and displaying the images acquired by the first modality system and the second modality system.
In a second aspect, a readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps of the above-described method.
In a third aspect, a control system of a multi-modal medical system, the system comprising a medical imaging and/or therapy system, the system further comprising a target zone adjustment module for setting a parameter of a second target zone of a second modal system and a parameter of an initial target zone of a first modal system to be the same parameter value; the system is also used for adjusting parameters of the initial target area to obtain a first target area of the first modal system;
the system also comprises a scanning control module which is used for taking the first target area as an image of the first modality system or a treatment target area to carry out image or treatment; and taking the second target area as an image or treatment target area of the second modality system to perform image or treatment.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following advantages:
the parameters of the second target area and the initial target area of the second modal system are set to be the same, then the initial target area is adjusted to obtain the first target area of the first modal system, the first target area can be conveniently set, the first target area can be flexibly set, the target area can be flexibly set for the first modal system under the condition that the position of the bed cannot be moved, not only all modal systems use the target areas with the same parameters for image or treatment, and the phenomenon that the image or treatment modality of a small target area cannot cover the whole interested area is avoided.
Drawings
Fig. 1 is a flow chart of a control method of a multi-modality medical system of the present invention.
Fig. 2(a) is a schematic diagram of copying parameters of the second target area to obtain the initial target area according to an embodiment of the present invention.
FIG. 2(b) is a schematic diagram of the initial target region and the region of interest according to one embodiment of the present invention.
Fig. 2(c) is a schematic diagram of adjusting the initial target area according to an embodiment of the present invention.
FIG. 2(d) is a diagram illustrating further adjustment of the initial target area according to an embodiment of the present invention.
Fig. 3(a) is a schematic diagram of a scout image and a region of interest according to another embodiment of the present invention.
FIG. 3(b) is a schematic diagram of a scout image and first, initial and second target areas according to another embodiment of the present invention.
Fig. 3(c) is a schematic diagram of adjusting the initial target area according to another embodiment of the present invention.
Fig. 3(d) is a schematic diagram of another embodiment of adjusting the initial target area according to the present invention.
FIG. 4 is a schematic diagram of an adjustment of a target area of a liver scanned by a PET/MR system according to another embodiment of the invention.
FIG. 5(a) is a schematic diagram of the adjustment of a target region for scanning the cranium by a PET/MR system according to another embodiment of the present invention.
FIG. 5(b) is a diagram illustrating the adjustment of the target region of the chest scanned by the PET/MR system according to another embodiment of the present invention.
FIG. 6 is a comparative schematic of PET/MR scan image fusion of the prior art and the present invention.
FIG. 7 is a system diagram of one embodiment of the present invention.
Fig. 8 is a system diagram of another embodiment of the present invention.
Detailed Description
The following provides a method, a system and a storage medium for controlling a multi-modality medical imaging and/or therapy system according to the present invention, which are described in detail with reference to the accompanying drawings and embodiments. Advantages and features of the present invention will become apparent from the following description and from the claims. It is noted that the drawings are in greatly simplified form and that non-precision ratios are used for convenience and clarity only to aid in the description of the embodiments of the invention.
Example one
This embodiment presents one embodiment of the control method and system of the multimodal system of the present invention. As shown in fig. 1, the present embodiment includes:
step S101: and setting the parameters of the second target area of the second modal system and the parameters of the initial target area of the first modal system to be the same parameter values.
The second target region is an image or treatment target region of the second modality system, and if the second modality system is a medical image system, the second target region is an image range region of the second modality system, which is also referred to as a scan field of view (FOV) or a second scan field of view FOV 2. The parameters of the second target area include position parameters, such as a center position parameter, a center line position parameter, a direction parameter, an angle parameter, a boundary parameter, a size parameter, and the like, and at least one of the parameters is copied as a parameter corresponding to the initial target area. Further, the copying is not limited to setting all parameters of the target area first and then copying at least one parameter to other target areas, but may also be setting at least one parameter of at least two target areas to be the same value at the same time.
Optionally, the system in the second modality is a medical imaging system such as PET and CT; the system of the second modality is a medical imaging or therapy system such as MR, RT, etc.
In one embodiment, if the center position parameter of the second target area is (x, y), it is copied as the center position parameter of the initial target area, i.e. the center position parameter of the initial target area is set to (x, y). In another embodiment, the centerline position parameter of the second target area is a, and it is copied as the centerline position parameter of the initial target area, i.e. the centerline position parameter of the initial target area is set to a. Optionally, the parameters of the corresponding second target region may be directly copied by the user as the parameters of the initial target region, or the parameters of the corresponding second target region may be automatically transmitted by the first modality medical image and/or the therapy system to the second modality medical image and/or the therapy system as the parameters of the initial target region. The method is adopted to carry out the target area parameters, the operation is flexible, and the working efficiency of the medical imaging system and/or the treatment system can be improved.
Alternatively, the scanned object (scanned part) may be pre-scanned by the second modality medical imaging system or the first modality medical imaging system, so as to obtain a pre-scanned image (whole image). The pre-scan image is used as a scout image of the scanned object.
Other image systems can also be adopted to carry out pre-scanning on the scanned object to obtain a pre-scanned image as a positioning image. The other imaging system may be a medical imaging system or an optical imaging system.
It should be noted that the above-mentioned copying of the parameter of the second target area as the parameter of the initial target area may also be implemented by setting the parameters of the second target area and the initial target area to be the same value at the same time, or by setting the parameter of the initial target area first and then copying it as the parameter of the second target area. Although there is a difference in the sequence of steps, it is essential that the parameters of the second target area and the initial target area are identical, and there is no essential difference.
Step S102: and adjusting parameters of the initial target area to obtain a first target area of the first modal system.
Parameters of the initial target zone are adjusted to meet imaging or treatment requirements of the first modality system. In one embodiment, the initial target area center position parameter is set to (x, y), which is adjusted to obtain a new parameter (x, y)1,y1). In another embodiment, the center line position parameter of the initial target area is set as A, and the center line position parameter is adjusted to obtain a new parameter A1。
In one embodiment, the parameters of the initial target area are adjusted in accordance with the location parameters of the region of interest. If the physician wishes to perform a first modality imaging or treatment of the liver of the medical subject, the parameters of the initial target region may be adjusted based on information such as the position and size of the liver. In one embodiment, the location parameters of the region of interest may be determined from a topogram, optical images, historical parameters of the medical object, and the like.
Further, in one embodiment, adjusting the initial target region parameters to obtain the first target region based on the region of interest includes causing the first target region to entirely cover the region of interest. If a doctor desires to perform imaging or treatment of a liver of a medical subject in a first modality, the whole liver is desirably included in an imaging or treatment target region, and therefore, initial target region parameters are adjusted according to information such as the position and size of the liver so that the target region can completely cover the liver, and the target region parameters at this time are set as parameters of the first target region.
Specifically, in an embodiment, the obtaining of the region of interest covered by the first target region according to the region of interest adjustment may include adjusting a center position parameter, a center line position parameter, a direction parameter, an angle parameter, a boundary parameter, a size parameter, and the like of the initial target region. In another embodiment, a center position parameter, a center line position parameter, an angle parameter, a boundary parameter, etc. of the region of interest are copied as the parameters corresponding to the first target region.
In another embodiment, as shown in fig. 2, the center position parameter of the second target area is (a, b), the angle parameter is 0, that is, the second target area is parallel to the bed direction, as shown in fig. 2(a), the large square frame is the second target area, the black dot is the position corresponding to the center position parameter, the angle parameter is defined as the included angle between the target area and the bed, and the bed direction is shown by the arrow;
optionally, the information such as the size or the position angle of the region of interest (e.g. liver) is automatically determined according to the spatial position relationship of the region of interest (e.g. liver) in (and) the pre-scan image (as a whole). Optionally, the scanning data acquired by the second modality medical imaging system can be fully utilized to obtain a pre-scanning image which has a wider range and can completely cover the region of interest, and more accurate and comprehensive parameter information of the size, position, angle, central line and the like of the region of interest can be acquired; and thus the initial target area parameters can be optimized. Furthermore, the second modality medical image system is used for pre-scanning, and the first modality medical image system is not needed to be used for scanning, so that the use of the first modality medical image system is reduced, the service time of equipment is prolonged, the scanning time can be reduced, and the scanning efficiency is improved.
Copying the central position parameter and the angle parameter of the second target area to obtain the central position parameter and the angle parameter of the initial target area, and combining the preset size parameter (c, d) of the initial target area to obtain the boundary parameters of the initial target area at this time (the left boundary x is a-c/2, the right boundary x is a + c/2, the lower boundary y is b-d/2, and the upper boundary y is b + d/2), and using the small box as shown in fig. 2(a) as the obtained initial target area.
The boundary parameter of the combined region of interest is (left boundary x ═ a)1The right boundary x ═ b1C is lower boundary1The upper boundary y ═ d1) Wherein a is1<b1，c1<d1It is found that b is due to1>a + c/2, the initial target area does not completely cover the region of interest, so the boundary parameter x ═ b of interest can be copied1As the corresponding initial target area parameters, the boundary parameters of the initial target area are obtained as (left boundary x is a-c/2, right boundary x is b)1The lower boundary y is b-d/2, and the upper boundary y is b + d/2). Fig. 2(b) is a schematic diagram of the initial target region and the region of interest, and fig. 2(c) is a schematic diagram of adjusting the initial target region according to the region of interest, wherein the slash region is the region of interest, the point filling region is the initial target region, and the second target region is omitted and not drawn.
As shown in fig. 2(d), in one embodiment, the initial target area may be further adjusted to adjust the boundary parameters to (left boundary x-a-c/2, right boundary x-b)1And e, the lower boundary y is b-d/2, and the upper boundary y is b + d/2), wherein e is a set positive number. In the imaging device, the image of the boundary of the target area may deform to a certain extent, so that a certain space is reserved between the boundary of the target area and the boundary of the region of interest, the image of the edge of the region of interest can be prevented from deforming, and an accurate image of the region of interest is provided for a doctor.
And taking the adjusted parameters of the initial target area as the parameters corresponding to the first target area to obtain the first target area.
The present embodiment can finely adjust and position the target region of some images or images with a smaller treatment range or the treatment system, so as to ensure that the images or treatments can cover the complete viscera or accurately align the interested region of the required images or treatments.
Step S103: the first target area is used as an image or treatment target area of the first modality system.
Specifically, the first modality system uses the first target area as an image or treatment target area, and the second modality system uses the second target area as an image or treatment target area to perform single-bed medical image or treatment. Further, the first modality system and the second modality system perform imaging and/or treatment simultaneously.
In the medical imaging or treatment field, generally, an image or a treatment target area is adjusted through movement of a bed, one image or treatment target area corresponds to one bed, and in a multi-modality medical system, a multi-modality image and/or treatment target area also corresponds to one bed, so that multi-modality images and/or treatments can be synchronized, consistency of the target area is ensured, but the defect that a certain modality target area cannot be adjusted is caused. In the embodiment, the target area parameters are copied and adjusted, and the single-bed image or treatment is carried out, so that the target area is conveniently set, the target area in a certain mode can be flexibly adjusted, and the relative consistency of the target area can be ensured.
In another embodiment, the multi-modality medical system is a dual-modality medical imaging system, i.e., the first modality system and the second modality system are medical imaging systems. After the image data is obtained by performing the image scanning in the above steps S101 to S103, step S104 is further performed: and fusing and displaying the images acquired by the first modality system and the second modality system.
Example two
In this embodiment, it is desirable to perform certain image scans or treatments of the heart of interest of a medical subject, obtain images and/or perform treatments using two different modality medical imaging or treatment systems.
According to an embodiment of the present invention, a control system of a multi-modality medical imaging and/or treatment system further includes: the device comprises a target adjusting module and a scanning control module. The target adjusting module is used for copying parameters of a second target area of a second modal system as parameters of an initial target area of a first modal system and adjusting the parameters of the initial target area to obtain a first target area of the first modal system; the scanning control module is used for taking the first target area as an image or treatment target area of the first mode system and taking the second target area as an image or treatment area of the second mode system.
Specifically, the scanning bed is moved to move the medical object to the set scanning area, and the region of interest of the medical object is the heart and has an irregular shape, as shown in fig. 3 (a).
In the prior art, when scanning images using a multi-modality imaging apparatus, the viewing fields of all multi-modality imaging systems, i.e., the target areas, are scanned around a center line a, and as shown in fig. 3(b), the target areas a and c are scanned around a center line a, i.e., a straight line a, of the same bed. However, at this time, since the range of the target region c is small, the corresponding scan image does not completely cover the region of interest.
In this embodiment, the target adjustment module sets the second target region of the second modality system to be a, whose centerline position is shown as a straight line a in fig. 3(a) -3 (d). In one embodiment, the center line a of the second target area a may be set to be aligned with the center of the region of interest, thereby ensuring that the second target area a completely covers the region of interest.
In this embodiment, the target adjusting module is further configured to copy the centerline position parameter of the second target area a of the second-modality system as the centerline position parameter of the initial target area c of the first-modality system. In one embodiment, as shown in fig. 3(b), the centerline position parameter of the second target area a is copied as the centerline position parameter of the initial target area c.
The target adjusting module is further configured to adjust a size parameter of the initial target region c according to the position size of the region of interest, so as to obtain a first target region b of the first modality, and enable the first target region b to completely cover the region of interest, as shown in fig. 3(c) and fig. 3 (d).
According to an embodiment of the present invention, there is provided a control method of a multi-modal medical imaging and/or treatment system using the multi-modal medical imaging and/or treatment system, including the steps of:
s201: obtaining a scout image of the medical object;
the positioning image is an image and/or a photographed image taken at the start of scanning, and is used to provide the doctor with positioning information of the medical object. The scout image may comprise a medical scan image, and may also comprise an optical image or other image.
A region of interest of the medical object is determined in the scout image. In one embodiment, the region of interest is the heart, as shown in fig. 3 (a).
S202: moving the patient bed to move the medical object to a set image scanning and/or treatment area;
specifically, the patient bed is moved according to the set bed parameters, such as moving the medical object to the scanning or treatment cavity, so that the region of interest of the medical object is scanned and/or the treatment target area is located within the scanning and/or treatment range of the system.
S203: setting a second target area of a second modal system as a;
specifically, the center line position parameter is set such that the center line thereof is aligned with the center of the heart of interest, i.e., the straight line a in fig. 3(a) and 3 (b). Further, the other parameters of the second target area a are set such that the second target area a completely covers the heart of interest.
S201-S203 are setting methods of a second target zone of the second modality system.
S204: the second target zone parameters of the second-modality system are copied as the parameters of the initial target zone of the first-modality system.
Specifically, the parameter includes at least one of a target area center position parameter, a center line position parameter, a direction parameter, and an angle parameter.
In one embodiment, the centerline position parameter of the second target area a is copied as the centerline position parameter of the initial target area. As shown in fig. 3(b), the initial target region is c, and the centerlines of the initial target region c and the second target region a are both straight lines a, i.e. the centerline position parameters are consistent.
In another embodiment, the central position parameter and the angle parameter of the second target area may be copied as the central position parameter and the angle parameter of the initial target area, as shown in fig. 3(b), and the central position parameter and the angle parameter of the initial target area c and the second target area a are identical.
S205: and adjusting the initial target area c to obtain a first target area of the first modal system.
As shown in fig. 3(b), the upper edge of the heart of interest is truncated by the upper edge line of the initial target region c, so that the image of the heart obtained with the initial target region c as the target region is incomplete, and particularly, the image at the edge of the target region of the imaging system is often not as accurate as the image at the center position thereof. It is therefore necessary to modify the target region so that it completely covers the heart of interest.
Specifically, adjusting the initial target area c includes adjusting at least one of a center position parameter, a center line position parameter, a direction parameter, an angle parameter, a boundary parameter, and a size parameter of the initial target area c. Further, adjusting the parameters of the initial target area c may be directly copying the corresponding parameters of the region of interest as the parameters of the initial target area c. The method can acquire the position parameter information of the positioning sheet and the interested region in real time and adjust the parameters of the target region in real time.
In one embodiment, the size of the initial target area c is changed to expand the range of the target area c. Specifically, the size parameter of the initial target region c is adjusted to cover the heart region of interest, resulting in a first target region, as shown by the first target region b in fig. 3 (b).
However, while enlarging the extent of the target area may result in more image information being obtained, often enlarging the extent size increases the image scan or treatment time. Therefore, the target area can also completely cover the region of interest by changing other parameters of the target area, such as a center position parameter, a center line position parameter, an angle parameter, and the like.
In one embodiment, the centerline position parameter of the initial target region c is adjusted to translate the centerline of the initial target region c from the original centerline a to the new centerline a 'to cover the heart region of interest, resulting in the first target region, as shown by target region c' in fig. 3 (c).
In another embodiment, the centerline position parameter of the initial target region c is adjusted such that the centerline of the initial target region c is rotated from the original centerline a to the new centerline a 'to cover the heart region of interest, resulting in the first target region, as shown by target region c' in fig. 3 (d).
In another embodiment, the angle parameter of the initial target area c is adjusted such that the angle of the initial target area c is rotated from a to a ', as shown by the target area c' in fig. 3 (d).
Furthermore, an adjustment strategy can be preset in advance, and the initial target area can be automatically adjusted according to the region of interest to obtain the first target area.
In the embodiment, the size of the target area is not changed to perform medical treatment or scanning, the region of interest can be completely covered by using the minimum scanning layer number, and the scanning time is saved.
S206: and taking a as a target area of the second modality system and c as a target area of the first modality system to carry out multi-modality medical image scanning and/or treatment on the medical object.
In particular, performing multi-modal medical image scanning of a medical object is single-bed image scanning and/or treatment. Further, in the image scanning and/or treatment process, according to a preset adjusting strategy, the initial target area is automatically adjusted according to the region of interest, and the first target area is obtained and used as a target area for real-time scanning and/or treatment. Further, the multi-modal medical image scanning and/or treatment of the medical object is performed simultaneously to ensure synchronicity of image acquisition and/or treatment.
In an embodiment, the first-modality system and the second-modality system are both image systems, and after the first-modality image and the second-modality image are obtained respectively in the above steps, there may be step S207.
S207: and fusing and displaying the first-mode image and the second-mode image obtained in the step S206.
The embodiment can be applied to the multi-modal system simultaneous imaging and/or treatment scene to adjust the target area so as to obtain a complete image of the region of interest, and avoids the need of performing supplementary imaging or treatment of a certain modal system after the multi-modal system simultaneous imaging and/or treatment is finished, thereby avoiding the possibility of mismatching caused by non-simultaneous imaging or treatment, and enabling the obtained multi-modal imaging to be more accurate in registration and fusion for the multi-modal imaging system.
FIG. 4 shows another embodiment, which is applied to a PET/MR system, i.e. a large functional metabolic and molecular imaging diagnostic device integrated by positron emission tomography and magnetic resonance imaging, and having both PET and MR imaging functions.
For some images and/or treatments, the position parameters of the second target area are copied to obtain an initial target area, and the initial target area can be directly used as the first target area to carry out multi-modal images or treatments. Generally, the centerline position parameter of the second target region of the PET modality system is directly copied as the centerline position parameter of the first target region of the first modality system, i.e., the MR modality system; and vice versa.
The second target area of the second modality system, i.e., the PET modality system, is larger, as shown by the solid color region. In this embodiment, the centerline position parameters of the second target region of the PET modality system are copied, as shown by the PET bed centerline in fig. 4, to obtain the initial target region, as shown by the dashed box in the figure; the initial target region is then adjusted according to the position of the liver of interest to obtain a first target region, which is shown as a solid box in the figure.
Furthermore, the initial target area is adjusted according to the position of the region of interest, which may be adjusting the upper boundary of the initial target area according to the coordinates of the region of interest, i.e., the uppermost edge of the liver part, and adjusting the lower boundary of the initial target area according to the coordinates of the lowermost edge of the region of interest. Or setting and adjusting the central line position parameter of the initial target area according to the central line position parameter of the interested area.
In the whole-body acquisition process, the MR protocol under a specific bed is added, the position and setting of the target area of the added MR protocol are more flexible, the target area is adjusted according to the region of interest, and the integrity of the image is ensured, as shown in figure 4. Particularly, in the positioning of liver scanning, the motion of the diaphragm needs to be estimated according to the breathing of the medical object, and the real-time and fine MR target area setting needs to be carried out to ensure the integrity of the liver MR image.
FIG. 5 is another embodiment, also applicable to a PET/MR system.
In one application, as shown in FIG. 5(a), a fine scan of the nervous system is performed, wherein the second target area of the PET scanning system is shown as a solid color area, the angle parameter is 0, and the center position parameter is shown as the position of the dots.
On one hand, when the region of interest is a hippocampus, a central position parameter of a second target area of the PET scanning system is copied as an initial target area position parameter, wherein the position is shown by a dot in the figure; the angle parameter is adjusted to-15 deg., and the first target region of the MR modality system is obtained, as shown by the dashed box.
On the other hand, when the region of interest is the whole brain, the central position parameter of the second target area of the PET scanning system is copied as the initial target area position parameter, such as the position shown by the round points in the figure; and then adjusting the angle parameter to be +15 degrees, setting the center position parameter to be the position shown by the square point, and simultaneously expanding the range of the initial target area to obtain a first target area completely covering the interested area, wherein the first target area is used as the first target area of the MR modal system and is shown as a solid line frame.
In another application, as shown in FIG. 5(b), a multi-plane scan of the heart is shown, wherein the second target area of the PET scanning system is shown as a solid color region, the angular parameter is 0, and the central position parameter is shown as the position of the dots.
Specifically, on the one hand, when the region of interest is a myocardium, the angle parameter and the center position parameter of the second target region of the PET scanning system are copied to obtain an initial target region, as shown by a dashed box in the figure, which can meet the scanning requirement of the myocardium, so that the initial target region can be used as the target region for MR scanning, that is, the prior art.
On the other hand, when the whole chest of the interested region is located, the initial target region can not completely cover the chest of the interested region, and can not waste scanning time and avoid unnecessary scanning range, so the scheme of the embodiment of the invention is adopted: copying the angle parameter and the central position parameter of a second target area of the PET scanning system to obtain an initial target area, wherein the initial target area is shown by a dotted line box in the figure; the central position parameters of the initial target area are adjusted from the round point to the square point as shown in the figure, and the size of the initial target area is adjusted to completely cover the chest of the interested area, so that the second target area of the MR scanning is obtained, as shown in the square box in the figure.
EXAMPLE III
As shown in FIG. 6, the effect of the prior art and the present invention adopted in the PET/MR device is compared in this embodiment.
In the existing product, because the centers of the target areas of the multi-modality system are set in a correlated manner, that is, consistent, when a scanning image obtained by a certain modality system is missing, the existing product can supplement the MR protocol which needs flexible positioning only after the end of PET acquisition, however, the MR image is not acquired synchronously with the PET, and the mismatching of MR and PET is easy to occur.
As shown in fig. 6, with the prior art non-synchronized acquisition, i.e. simultaneous acquisition of PET and MR images with beds 1-5, it was found that the MR images did not fully show the entire region of interest, and an additional MR scan of bed 6 was required. At this time, because the PET images of the beds 1-5 and the MR image of the bed 6 are not acquired synchronously, the fusion display of the PET images and the MR images is relatively deviated, and the workload and the working time are additionally increased.
If the technical scheme of the invention is adopted for synchronous acquisition, if the region of interest is shot by the MR image of the bed 2 and is fused and displayed with the PET images of the beds 1-5, the defects of the prior art can be effectively overcome, the registration and fusion of the PET and MR images are more accurate, and the extra workload and working time are avoided.
Example four
Referring to fig. 7, the present embodiment is a multi-modality medical imaging and/or therapy system, which at least includes an interactive device 102, a control device 104, a memory 108, and at least two imaging devices 106; the two imaging devices are multi-modal medical imaging devices.
The interactive device 102 includes a display module for displaying the current system state, the current system parameters, the parameters used in the next stage of the system acquisition, the images and/or treatment data acquired by the system, and the like to the user; the interactive device further comprises a user input module, which is used for receiving user input data, adjusting image display parameters by a user, processing images by the user and the like.
The interactive device also comprises a parameter setting module which is used for reading the stored system parameters from the memory and setting the system parameters according to the input of the user and the preset parameter adjustment rule. The parameter setting module includes a target area adjustment module for setting target area parameters of system images and/or treatments using the method of the above embodiment.
The control device 104 includes a scan control module for setting a target area of the image and/or therapy system according to the target area parameters set by the target area adjustment module, and controlling at least two image and/or therapy devices to perform image and/or therapy according to the system parameters set by the interaction device and the parameter setting module.
The memory 108 may be a local memory, such as a local hard disk, an optical disk, a usb disk, or a local area network storage system, such as a Picture Archiving and Communication System (PACS) in a hospital, or a cloud memory, such as a cloud PACS, a cloud storage, or the like.
The system parameters stored in the memory 108 may be a set of system parameters stored in advance, a set of parameters composed of several system parameters searched for, or corresponding system parameters in the medical image stored in the memory. The parameter setting module reads the stored system parameters from the memory, can select a group of system parameters according to a user, and can also obtain a group of system parameters by screening according to preset information. The preset information may be patient information, medical equipment information, or a combination thereof.
The interactive device 102 may be a computer, a tablet, a mobile phone, or a device integrated with an imaging or therapy device. The display module may include a display, a projector, a light, a three-dimensional hologram, an alarm light, etc.; the user input modules may include a keyboard, mouse, camera capture gestures, physical keys, touch screen, and the like.
The system parameters refer to parameters of the system during imaging and/or treatment, and include scanning parameters, treatment parameters, target area parameters and the like, and may also include reconstruction parameters, post-processing parameters and the like during image display after image scanning.
The imaging device may be a Computed Tomography (CT) device, a Magnetic Resonance imaging (MR) device, a Positron emission Computed Tomography (PET) device, an X-ray device, an Ultrasound imaging (US) device, an endoscope; the therapeutic equipment is equipment which utilizes various energies (force, heat, light, electricity, sound, magnetism and the like) to act on a human body, removes useless tissues and maintains the stability of physiological parameters to achieve the aim of treating diseases, and can be radiotherapy equipment, nuclear medicine therapeutic equipment, laser equipment, a surgical robot, radio frequency equipment, electric pulse equipment and the like.
Optionally, the imaging apparatus is a PET-MR scanning apparatus (system), which includes a PET scanning device (system) and an MR scanning device (system), and the PET scanning device and the MR scanning device are integrated together to form a common (coaxially arranged) cylindrical accommodation region, and the accommodation region includes a target region, a first target region and/or a second target region; the target zone, the first target zone and/or the second target zone (scan field of view, FOV) are mapped to the interaction device and the scan field of view can be adjusted/set by adjusting the corresponding parameters on the interaction device. The embodiment realizes the adjustment and the setting of the scanning view field of the imaging system with two modes through visual interactive equipment, and the adjustment/setting of the scanning parameters is more rapid, flexible and convenient for an operation user, so that the use efficiency of the equipment can be greatly improved.
In one embodiment, a schematic view of a multimodal medical imaging and/or therapy system is shown in fig. 8, the system including an interactive device 102, a control device 104, a multimodal medical imaging and/or therapy device 106' and a memory 108.
The interactive device 102 displays the required display information for the user through the display device, including the information of the parameter setting module, the feedback information of the control device, the image or treatment system information and data, the system parameters read from the memory, the stored image and other information, such as the patient information, the state information of the interactive device and the like.
The interactive device 102 further includes a parameter setting module for setting system parameters, and the parameter setting module can read the state of the control device, the system parameters, and the like from the control device, and can also read the device parameters from the memory; the parameter setting module can also transmit information such as set system parameters to the control equipment.
The control device is used for receiving information such as system parameters and the like transmitted by the interactive device and controlling the multi-modal medical imaging and/or treatment device 106' by using the system parameters and the like; the control device is also used for interacting with the memory, reading system parameters and system information from the memory, and storing the acquired image and treatment information, system state and the like to the memory.
The memory is used for storing system parameters, images and treatment information and also can store system states, such as system logs and the like; the memory can interact with the interactive device and is used for displaying images or treatment information for a user and providing stored system parameters, system state history and the like for the user; the memory can also interact with the control device, send parameter information needed by the device for image or treatment, and receive device image data and treatment information.
In one embodiment, a method of using a control system of a multi-modality medical imaging and/or therapy system includes:
when a user sets system parameters using the interactive device, the imaging or treatment protocol at a particular bed provides a switch to control the turning on of the "off-center" function so that the target zone of at least one modality can be adjusted according to the region of interest or other actions of the physician.
The function of the 'off-center' is in a closed state under the default condition, so that the abnormal image splicing of image scanning caused by misoperation of a user is avoided.
During non-synchronous acquisition, the multi-mode system is not in a working state, and the off-center switch automatically disappears, so that the confusion of the user in use can be avoided, and the positioning of the mode needing special image scanning or treatment is more flexible.
In another embodiment, the same setting as the "off-center" function option may be used to provide the user with the function (parameter) options of "off-center line", "off-angle", "off-boundary", "off-top boundary", "off-bottom boundary", "off-left boundary", "off-right boundary", and the like.
In this embodiment, by integrating the setting/adjusting function options of the scanning parameters on the display module of the interactive device, the user can directly select the corresponding function (parameter) options on the scanning interface based on the adjustment/setting requirements of the scanning field of view, thereby rapidly realizing the parameter adjustment and setting of the scanning field of view of the imaging system.
In a specific embodiment, the method of the above embodiment is applied in a PET/MR system.
In one embodiment, in the whole body scanning and acquiring process of PET/MR, the MR protocol under a specific bed is added, the target area of the added MR protocol is more flexibly set, the acquisition can be carried out by taking the region of interest as the center, and the integrity of the image acquired by the MR scanning is ensured. Particularly, in the setting of the target area for liver scanning, the movement of the diaphragm needs to be estimated according to the respiration of the patient, and the fine setting of the target area for MR scanning is performed to ensure the integrity of the MR image of the liver.
In another embodiment, in the whole body scanning and acquisition process of PET/MR, the MR protocol under a specific bed is added, the acquisition is carried out by taking the region of interest as the center, the region of interest is completely covered by using the minimum MR layer number, and the scanning time is saved. In particular, such as fine scans of the nervous system and multi-planar scans of the heart.
In the above embodiment, the MR scanning image and the PET scanning image are obtained simultaneously, which solves the problem that in the prior art, the MR protocol requiring flexible positioning can only be supplemented for scanning after the PET scanning acquisition is finished, and at this time, because the MR scanning image is not acquired synchronously with the PET scanning image, the mismatch problem of the MR scanning image and the PET scanning image is easy to occur, so that the registration and fusion of the PET scanning image and the MR scanning image are more accurate.
And providing an option of an MR (magnetic resonance) off-center function, and acquiring medical images by deviating the center of the target area of the MR modality from the center of the target area of the PET modality under the condition that the bed position cannot move so as to ensure that the MR images can cover complete viscera. And in the subsequent image fusion, the splicing quality of the MR images can be ensured.
As shown in fig. 4, MR isocentric acquisition is marked beside the target region, that is, the target region is obtained without adjusting according to the region of interest; and marking MR off-center acquisition, namely obtaining a target area by adjusting the center position according to the region of interest.
In a specific embodiment, the PET/MR system is used for a modal scan.
Step S301: selection of a scan protocol is performed.
If a whole-body scan acquisition is required, a PET scan protocol template for the whole-body scan acquisition may be selected. The selection can be manual selection, or can be a scanning protocol template automatically selected by the system according to personal information of the scanned object, habits of the user and preset preferences.
Step S302: and displaying the selected scanning protocol in a display interface at the control end of the PET/MR system. Specifically, the display information includes parameters of the scanning protocol and may further include a corresponding image of the scanning protocol. The image display corresponding to the scanning protocol may be an image corresponding to the scanning protocol, which is stored in advance, or an image generated in real time according to the scanning protocol and a certain rule, and is used for providing a graphical scanning protocol information display for a user. Such as displaying the scan range of the current protocol on the mannequin.
Step S303: and modifying the scanning protocol parameters to obtain the protocol to be scanned.
Specifically, the modification of the scan protocol parameters includes: the MR "off-center" function is turned on to modify the scan protocol parameters using the method in the above embodiment. The method comprises the steps of setting a PET scanning target area and an MR scanning target area according to a region of interest, wherein the MR scanning target area is obtained by copying the PET scanning target area to obtain an initial target area and then adjusting the initial target area.
Step S304: and carrying out PET/MR scanning image acquisition.
And moving the sickbed into a preset bed position A according to the bed position information set by the protocol. Generally, the position of the patient bed varies differently during the scan acquisition. And simultaneously carrying out scanning image acquisition on the scanned object according to the preset PET scanning target area and the MR scanning target area.
In the embodiment, by providing the MR "off-center" scan, the MR off-center image acquisition is performed under the condition that the bed position cannot move, so as to ensure that the MR image can cover the whole organ.
In the prior art, when the patient bed moves to a preset bed position, the center line of the PET scan image target area and the center line of the MR scan image target area are set as the patient bed a according to the patient bed a at the moment. Therefore, in order to ensure that the MR image of the complete organ of interest is obtained, in the prior art, after the scanning of the bed a is finished, the MR image needs to be subjected to supplementary scanning to obtain the MR image of the complete organ of interest, which not only brings extra scanning time and workload, but also cannot ensure the matching effect of fusion display of the PET image and the MR image. In this embodiment, the central line of the target region of the PET scan image is set as a, and the central line of the target region of the MR scan image is set as another value a', so as to ensure that an MR image of a complete organ of interest is obtained.
Step S305: and fusing and displaying the obtained PET image and the MR image.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the invention. Therefore, the protection scope of the present invention should be determined by the appended claims.
Claims (10)
1. A method of controlling a multi-modality medical system, the system being a medical imaging and/or therapy system, the method comprising:
setting parameters of a second target area of a second modal system and parameters of an initial target area of a first modal system to be the same parameter values;
wherein the second target zone is an image or treatment target zone of the second modality system;
adjusting parameters of the initial target area to obtain a first target area of the first modal system;
and taking the first target area as an image or treatment target area of the first modality system.
2. The method according to claim 1, wherein the setting the parameter of the second target zone of the second modality system and the parameter of the initial target zone of the first modality system to the same parameter value comprises:
copying at least one of a central position parameter, a central line position parameter, a target area direction parameter and a target area angle parameter of the second target area as a corresponding parameter of the initial target area; or
Setting at least one of a central position parameter, a central line position parameter, a target area direction parameter and a target area angle parameter of the second target area and the initial target area as the same parameter value; or
Copying at least one of the central position parameter, the central line position parameter, the target area direction parameter and the target area angle parameter of the initial target area as a corresponding parameter of the second target area.
3. The method of claim 1, wherein said adjusting parameters of said initial target region comprises adjusting according to a region of interest.
4. The method of claim 3, wherein said adjusting parameters of said initial target region according to a region of interest comprises:
and adjusting the initial target area to obtain the first target area, so that the first target area completely covers the interested area.
5. The method of claim 3, wherein said adjusting parameters of said initial target zone according to a region of interest comprises at least one of:
adjusting the central position parameter of the initial target area according to the information of the interest area;
adjusting the center line position parameter of the initial target area according to the information of the interest area;
adjusting the direction parameters of the initial target area according to the information of the interested area;
adjusting the angle parameter of the initial target area according to the angle of the interested area;
adjusting the boundary parameters of the initial target area according to the boundary of the region of interest;
and adjusting the size parameter of the initial target area according to the boundary of the region of interest.
6. The method of claim 5,
the adjusting of the center position parameter of the initial target area comprises copying the center position parameter of the region of interest as the center position parameter of the first target area;
the adjusting the centerline position parameter of the initial target region comprises copying the centerline position parameter of the region of interest as the centerline position parameter of the first target region;
the adjusting the angle parameter of the initial target area comprises copying the angle parameter of the region of interest as the angle parameter of the first target area;
the adjusting of the boundary parameters of the initial target region comprises copying the boundary parameters of the region of interest as the boundary parameters of the first target region.
7. The method of claim 1, wherein the first modality system performs single-bed medical imaging or treatment with the first target area as an imaging or treatment target area and the second modality system performs single-bed medical imaging or treatment with the second target area as an imaging or treatment target area.
8. The method of claim 1,
the first modality system and the second modality system are medical image systems;
and fusing and displaying the images acquired by the first modality system and the second modality system.
9. A readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 8.
10. A control system for a multi-modality medical system, the system being a medical imaging and/or therapy system,
the system comprises a target area adjusting module, a target area adjusting module and a target area adjusting module, wherein the target area adjusting module is used for setting parameters of a second target area of a second modal system and parameters of an initial target area of a first modal system to be the same parameter values; the system is also used for adjusting parameters of the initial target area to obtain a first target area of the first modal system;
the scanning control module is used for taking the first target area as an image or treatment target area of the first modality system to perform image or treatment; and imaging or treating the second target area serving as the imaging or treating target area of the second modality system.
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| US18/321,745 US20230310895A1 (en) | 2018-12-17 | 2023-05-22 | Systems and methods for determining a region of interest of a subject |
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