CN108523914A - Medical image system and its method of adjustment - Google Patents
Medical image system and its method of adjustment Download PDFInfo
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- CN108523914A CN108523914A CN201810059447.4A CN201810059447A CN108523914A CN 108523914 A CN108523914 A CN 108523914A CN 201810059447 A CN201810059447 A CN 201810059447A CN 108523914 A CN108523914 A CN 108523914A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computerised tomographs
- A61B6/032—Transmission computed tomography [CT]
- A61B6/035—Mechanical aspects of CT
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/02—Devices for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computerised tomographs
- A61B6/037—Emission tomography
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/42—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment with arrangements for detecting radiation specially adapted for radiation diagnosis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus for radiation diagnosis, e.g. combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
- A61B6/4411—Constructional features of apparatus for radiation diagnosis the apparatus being modular
Abstract
This application involves medical imaging technology field more particularly to a kind of medical image system and its methods of adjustment.Medical image system includes calibration device and medical imaging devices, and the medical imaging devices include：There is imaging through-hole, multiple image-forming assemblies to be arranged in order along the axial direction of the imaging through-hole for multiple image-forming assemblies, each image-forming assembly, for being imaged to the calibration device in the imaging through-hole；Control mechanism, it is electrically connected with multiple image-forming assemblies, for controlling multiple image-forming assemblies while being imaged to the calibration device, obtain the real image of the calibration device, and the theoretical image of the real image and the calibration device, determine whether the axis of multiple image-forming assemblies overlaps according to comparison result.The application can improve the judgement precision of the registration of the scan axis of multiple image-forming assemblies.
Description
Technical field
This application involves medicine technology field more particularly to a kind of medical image system and its methods of adjustment.
Background technology
Usually patient is imaged using nuclear medical imaging device in medicine detection, for example, PET (positron
Emission tomography, positron emission tomography instrument) imaging device, it is by micro positron radionuclide tracer
Agent is injected into the human body, then detects these positron radionuclides in human body using special external survey meter (PET image-forming assemblies)
The distribution situation of each internal organs shows the physiological metabolism of the major organs of human body by the method for computerized tomograph.PET
Imaging device generally includes one or more PET image-forming assemblies, and each PET image-forming assemblies are surrounded by multiple detectors and form ring-type
Structure.In addition, PET imaging devices usually require to be combined with other imaging devices, the imaging to patient is completed by image co-registration,
Such as PET imaging devices are combined to form PET-CT equipment with CT imaging devices.
In PET-CT equipment, or when multiple PET image-forming assemblies are combined, the scan axis for making PET and CT is needed
The scan axis of line or multiple PET image-forming assemblies overlaps, and in the prior art, is realized by the way that mounting tool is arranged, by multiple PET
Image-forming assembly is installed together by mounting tool respectively, however, due to manufacture and assembling process in there are error,
Even if after being assembled using mounting tool, the registration of the scan axis of multiple PET also is difficult to ensure, and can not judge scan axis
Whether overlap, therefore, it is impossible to determine whether scanning result is accurate.
Invention content
This application provides a kind of medical image system and its methods of adjustment, can solve the above problems.
The first aspect of the application provides a kind of medical image system, including calibration device and medical imaging devices, institute
Stating medical imaging devices includes：
Multiple image-forming assemblies, each image-forming assembly have imaging through-hole, and multiple image-forming assemblies are along the imaging
The axial direction of through-hole is arranged in order, for being imaged to the calibration device in the imaging through-hole；
Control mechanism is electrically connected with multiple image-forming assemblies, for controlling multiple image-forming assemblies simultaneously to described
Calibration device is imaged, and the real image of the calibration device, and the real image and the calibration device are obtained
Theoretical image, determine whether the axis of multiple image-forming assemblies overlaps according to comparison result.
Optionally, further include regulating mechanism, connect respectively with multiple image-forming assemblies and the control mechanism；The control
Mechanism processed controls the regulating mechanism also according to the comparison result and each image-forming assembly is adjusted to precalculated position.
Optionally, the image-forming assembly includes multiple PET image-forming assemblies along the axial serial arrangement.
Optionally, the image-forming assembly include along the axial serial arrangement CT image-forming assemblies and at least one PET at
As component.
Optionally, the calibration device runs through the imaging through-hole of the CT image-forming assemblies and the PET image-forming assemblies, and institute
It includes radioactive source to state calibration device to be located at the part of the imaging through-hole of the PET image-forming assemblies.
Optionally, the calibration device includes hollow parts and the radioactive source that is set in the hollow parts.
Optionally, the calibration device further includes solid section, and the solid section is with the hollow parts along described logical
The axial setting in hole.
The second aspect of the application provides a kind of method of adjustment of any one of them medical image system as above, described
Medical image system includes medical imaging devices, and the medical imaging devices include the multiple image-forming assemblies being arranged in order, each
The image-forming assembly, which has, is imaged through-hole, and the method for adjustment includes：
S200：Calibration device is positioned in the imaging through-hole；
S400：Multiple image-forming assemblies are simultaneously imaged the calibration device, obtain the reality of the calibration device
Border image；
S600：The theoretical image for comparing the real image and the calibration device determines multiple institutes according to comparison result
Whether the axis for stating image-forming assembly overlaps.
Optionally, the medical image system further includes regulating mechanism, is connect respectively with multiple image-forming assemblies；It is described
Further include after step S600:
S800：Each image-forming assembly is adjusted to precalculated position according to the comparison result.
Optionally, the step S200 includes：
S212：The component on the basis of an image-forming assembly adjusts the fiducial, its axis is made to be located at reference plane
On；
S214：The calibration device is positioned in the imaging through-hole, and the calibration device runs through each image-forming assembly
Imaging through-hole；
The step S600 is specially：
Compare the real image and the theoretical image, and remaining in addition to fiducial is judged according to comparison result
Whether the imaging through-hole of the image-forming assembly is coaxial with the imaging through-hole of fiducial；
The step S800 is specially：
According to the comparison result by remaining described image-forming assembly in multiple image-forming assemblies in addition to fiducial
It is adjusted to precalculated position.
Technical solution provided by the present application can reach following advantageous effect：
Medical image system provided herein is equipped with calibration device, and in adjustment, multiple image-forming assemblies are simultaneously to school
The imaging of quasi- device, due to when the real image of calibration device and theoretical image exactly match, the scan axis of each image-forming assembly
It coincides together, and the precision of images match is relatively high, therefore, the theoretical image and real image of comparison calibration device can
Judge whether the axis of each image-forming assembly overlaps, it is this by the way of image analysis, sweeping for multiple image-forming assemblies can be improved
Retouch the judgement precision of the registration of axis.
It should be understood that above general description and following detailed description is merely exemplary, this can not be limited
Application.
Description of the drawings
Fig. 1 is a kind of system diagram of specific embodiment of medical image system provided herein；
Fig. 2 is a kind of structural schematic diagram of specific embodiment of medical image system provided herein；
Fig. 3 is the knot of a kind of specific embodiment of single PET image-forming assemblies in medical image system provided herein
Structure schematic diagram；
Fig. 4 is the structural representation of a kind of specific embodiment of regulating mechanism in medical image system provided herein
Figure；
Fig. 5 is the structural representation of a kind of specific embodiment of calibration device in medical image system provided herein
Figure；
Fig. 6 is in medical image system provided herein, and the structure of another specific embodiment of calibration device is shown
It is intended to；
Fig. 7 is in medical image system provided herein, and the structure of another specific embodiment of calibration device is shown
It is intended to；
Fig. 8 is the theoretical image of a kind of specific embodiment of calibration device in medical image system provided herein
Schematic diagram；
Fig. 9 is the real image of a kind of specific embodiment of calibration device in medical image system provided herein
Schematic diagram；
Figure 10 is a kind of flow chart of specific embodiment of method of adjustment provided herein.
Reference numeral：
10- calibration devices；
11- hollow parts；
12- solid sections；
20-PET image-forming assemblies；
21- detector modules；
22- module fixed rings；
23-PET pedestals；
30- regulating mechanisms；
31- adjustment bases；
The first pedestals of 32-；
The second pedestals of 33-；
34- third pedestals；
40- control mechanisms；
50-CT image-forming assemblies；
51-CT is imaged ontology；
60- theoretical images；
70- real images.
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application
Example, and the principle together with specification for explaining the application.
Specific implementation mode
It is described in further detail below by specific embodiment and in conjunction with attached drawing to the application.
As shown in figs. 1-7, the embodiment of the present application provides a kind of medical image system, including calibration device 10 and medicine at
As equipment, medical imaging devices include control mechanism 40 and multiple image-forming assemblies (such as PET image-forming assemblies 20), and image-forming assembly is used for
Calibration device 10 is imaged, each image-forming assembly defines imaging through-hole, axial direction of multiple image-forming assemblies along imaging through-hole
It is arranged in order, i.e., each image-forming assembly is arranged in a row along the direction where the axis of respective imaging through-hole.Control mechanism 40 with
Multiple image-forming assembly electrical connections obtain calibration device for controlling multiple image-forming assemblies while being imaged to calibration device 10
10 real image 70, and compare the theoretical image 60 of real image 70 and calibration device 10, it is determined according to comparison result multiple
Whether the axis of image-forming assembly overlaps.
The method of adjustment of above-mentioned medical image system is as shown in Figure 10, including：
S200：Calibration device 10 is positioned in medical imaging devices；
S400：Multiple PET image-forming assemblies 20 are simultaneously imaged calibration device 10, obtain the practical figure of calibration device 10
As 70；
S600：The theoretical image 60 for comparing real image 70 and calibration device 10 determines multiple imaging groups according to comparison result
Whether the axis of part overlaps.
Above-mentioned medical image system is equipped with calibration device 10, and when medical image system adjusts, multiple image-forming assemblies are simultaneously
Calibration device 10 is imaged, due to when the real image 70 of calibration device 10 and theoretical image 60 exactly match, each imaging group
The scan axis of part coincides together, and the precision of images match is relatively high, therefore, by comparing the theoretical diagram of calibration device 10
As 60 and real image 70, it can accurately determine whether the axis of multiple image-forming assemblies overlaps, raising judges precision, and then determines
The accuracy of scanning.
Further, medical image system further includes regulating mechanism 30, and regulating mechanism 30 is used to adjust the position of image-forming assembly
It sets, so that the scan axis of each image-forming assembly overlaps, regulating mechanism 30 is connect with multiple image-forming assemblies and control mechanism respectively, is controlled
Mechanism 40 processed controls to adjust mechanism 30 also according to comparison result and each image-forming assembly is adjusted to precalculated position, specifically, control machine
Structure can analyze above-mentioned comparison result, obtain the adjustment parameter of image-forming assembly, while driving respectively according to each adjustment parameter
Regulating mechanism 30 acts.At this point, in above-mentioned method of adjustment step S600, if the axis of each image-forming assembly is misaligned, S600 it
After can also include：
S800：Each image-forming assembly is adjusted to precalculated position according to above-mentioned comparison result.Specifically, by above-mentioned comparison
Relatively result is analyzed, and obtains the adjustment parameter of each image-forming assembly, then, is adjusted to each image-forming assembly according to each adjustment parameter
Section, makes each image-forming assembly be adjusted to precalculated position, realizes that the axis of each image-forming assembly overlaps.
Increase above-mentioned regulating mechanism 30 and step S800, when finding that the axis of multiple image-forming assemblies is misaligned, due to figure
As matched precision is relatively high, therefore, this structure can improve the scan axis of multiple image-forming assemblies by adjustment structure 30
Registration, and then improve multiple image-forming assemblies at image matching degree, improve the accuracy of diagnosis；And by comparing practical
Image 70 and theoretical image 60, can obtain the accurate adjustment parameter of each image-forming assembly, be by the directly adjusting of regulating mechanism 30
Can, keep adjustment behaviour more convenient.
Image-forming assembly may include multiple PET image-forming assemblies 20 along above-mentioned axial serial arrangement；Can also include simultaneously
Along the CT image-forming assemblies 50 and at least one PET image-forming assemblies 20 of above-mentioned axial serial arrangement.Since PET image-forming assemblies 20 are general
Functional imaging is carried out to patient, and CT (Computed Tomography, computer tomography instrument) image-forming assembly 50 can be right
The part of patient is accurately positioned, therefore, in order to improve the accuracy of detection, usually by multiple PET image-forming assemblies 20 and CT
Image-forming assembly 50 is used in conjunction with, and is so organically combined together two kinds of advanced image technologies of PET and CT, is used
When by micro positron radionuclide tracer injection into the human body, then use PET image-forming assemblies 20 detect these positive electricity daughter nucleus
Element each internal organs of human body distribution situation, while application CT technologies be these Nuclear analysis situations be accurately positioned, so that this is set
It is standby to have the advantages that PET and CT simultaneously.That is, medical imaging devices can also include CT image-forming assemblies 50, usually, CT
Image-forming assembly 50 is arranged in the side of multiple PET image-forming assemblies 20 along the orientation of multiple PET image-forming assemblies 20, i.e., such as Fig. 2
Shown, CT image-forming assemblies 50, multiple PET image-forming assemblies are arranged in order, so that medical image system is provided simultaneously with PET image-forming assemblies
The function of 20 and CT image-forming assemblies 50.Certainly, medical imaging devices can only include a PET image-forming assembly 20.
Wherein, calibration device 10 is set to medical imaging devices, and each PET image-forming assemblies 20 can be respectively connected with regulating mechanism
30, each PET image-forming assemblies 20, regulating mechanism 30 are connect with control mechanism 40.CT image-forming assemblies 50 can connect regulating mechanism
30, regulating mechanism 30 can not also be connected.
Control mechanism 40 may include controller and data-analyzing machine, and controller is connected with data-analyzing machine signal, control
Device obtains the real image of calibration device 10 for controlling multiple PET image-forming assemblies 20 while being imaged to calibration device 10
70, and real image is sent to data-analyzing machine, while driving each regulating mechanism 30 to act according to each adjustment parameter；Data point
Parser is used to compare the theoretical image 60 of real image 70 and calibration device 10, and compared result is analyzed, obtain each PET at
It is sent to controller as the adjustment parameter of component 20, while by adjustment parameter.Control mechanism 40 can be arranged to be set in medical imaging
It in standby, in PET image-forming assemblies 20, can also be separately provided, such as be equipped with control rack, control mechanism 40 is positioned over control rack
In.
It is to be appreciated that calibration device 10 includes radioactive source, radioactive source can be solid source, and such as germanium -68, half-life period is
288+/- 6 days；May be fluid supply, such as Value linear, half-life period is 108.9 minutes, so as in CT image-forming assemblies 50, PET imagings
Component 20 is imaged.The material of calibration device 10 can be plastic material, such as organic glass (PMMA), ABS, POM, nylon, poly- second
Alkene, polyvinyl chloride etc.；The material of calibration device 10 may be metal material, such as aluminium alloy, titanium alloy, magnesium alloy, stainless
Steel, carbon steel etc..
Calibration device 10 runs through the imaging through-hole of image-forming assembly, and calibration device is located at the portion of the imaging through-hole of image-forming assembly
It includes radioactive source to divide.When medical imaging devices include CT image-forming assemblies 50 and PET image-forming assemblies 20, calibration device 10 runs through CT
The imaging through-hole of image-forming assembly 50 and PET image-forming assemblies 20, and calibration device 10 is located at the imaging through-hole of PET image-forming assemblies 20
Part includes radioactive source, to ensure that each image-forming assembly can accurately be imaged calibration device 10.
Specifically, calibration device 10 can be solid construction, as shown in figure 5, radioactive source can be solid source at this time, and point
It is distributed in calibration device 10, radioactive source at this time is generally solid source.
Calibration device 10 can also include hollow parts 11, as shown in fig. 6, radioactive source can be set to hollow parts at this time
In 11, which can be solid source, or fluid supply.By the way that hollow parts 11 are arranged, radioactive source can be convenient for
Setting, especially when radioactive source is fluid supply.
Calibration device 10 can also include solid section 12 and hollow parts 11, and solid section 12 and hollow parts 11 are along row
Column direction is arranged, wherein orientation is the orientation of each PET image-forming assemblies, as shown in Figure 7.By increasing solid section
12, the intensity of calibration device 10 can be increased.When calibration device 10 is positioned over medical imaging devices, solid section 12 is more hollow
Part 11 is located at the outside of medical imaging devices.
It certainly, can also 12 He of solid section when calibration device 10 includes simultaneously solid section 12 and hollow parts 11
Hollow parts 11 are both provided with radioactive source.
When calibration device 10 is equipped with hollow parts 11, when calibration device 10 is positioned over the scanning area of medical imaging devices
When, the part that calibration device 10 is located in medical imaging devices scanning through-hole is at least hollow parts 11, i.e., where radioactive source
Position is located in medical imaging devices scanning through-hole, to ensure that each image-forming assembly can be accurately imaged.
In general, calibration device 10 is straight stick, when including solid section 12 and hollow parts 11 at the same time, solid section 12 with
Hollow parts 11 can also be arranged along the mandrel line of calibration device 10.When the scan axis of multiple PET image-forming assemblies 20 overlaps,
Formed image is the rectangular image of continuous uniform, i.e. theoretical image 60, as shown in Figure 8；In the scan axis of multiple image-forming assemblies
When line is misaligned, the part that the image of the calibration stick of continuous uniform has can be caused phenomena such as deviation, tilt occur, that is, practical figure
As shown in Figure 9 as 70, it is clear that, there is deviation compared with theoretical image 60, tilts in real image 70.Using this straight stick structure, by
In the rectangle that theoretical image 60 is standard, it is easy to by real image 70 compared with theoretical image 60, to simplify control mechanism
40 comparative and analysing program.
Specifically, PET image-forming assemblies 20 are as shown in figure 3, include detector module 21, module fixed ring 22 and the bottoms PET
Seat 23,22 structure annular in shape of module fixed ring, module fixed ring 22 is movably installed in PET pedestals 23, and detector module 21 is equipped with
Multiple, multiple detector modules 21 are along the circumferentially disposed in the inner ring of module fixed ring 22 of module fixed ring 22, in adjustment,
Calibration device 10 is set in module fixed ring 22, with by detector module 21 to the object that is set in module fixed ring 22
Body carries out 360 degree of scannings imaging.
Regulating mechanism 30 is installed between PET pedestals 23 and module fixed ring 22, to drive module by regulating mechanism 30
22 activity of fixed ring, and then adjust the position of each detector module 21.
Further, above-mentioned each PET image-forming assemblies 20 are respectively provided with there are two regulating mechanism 30, and two regulating mechanisms 30 are distinguished
Positioned at the both sides of the scan axis of PET image-forming assemblies, two regulating mechanisms 30 are arranged by each PET image-forming assemblies 20, it can
The both sides of PET image-forming assemblies 20 are adjusted respectively, to keep the adjustment of PET image-forming assemblies 20 more convenient.
Specifically, CT image-forming assemblies 50 include CT imaging ontologies 51 and CT pedestals, and CT imaging ontologies 51 are connected to CT pedestals,
When CT image-forming assemblies 50 are not provided with regulating mechanism 30, CT imaging ontologies 51 are fixedly connected on CT pedestals；In CT image-forming assemblies 50
When equipped with regulating mechanism 30, CT imaging ontologies 51 are movably connected on CT pedestals by regulating mechanism 30, at this point, CT image-forming assemblies 50
It can also be arranged there are two regulating mechanism 30, two regulating mechanisms 30 are located at the two of the scan axis of CT image-forming assemblies 50
Side can more accurately be adjusted CT imaging ontologies 51, by the regulating mechanism 30 of both sides to make CT image-forming assemblies 50
Adjustment it is more convenient.
Specifically, as shown in figure 4, above-mentioned regulating mechanism 30 includes adjustment base 31, is slidably connected to tune along first direction
It saves the first pedestal 32 of pedestal 31, be slidably connected to the second pedestal 33 of the first pedestal 32 in a second direction, and along third direction
It is slidably connected to the third pedestal 34 of the second pedestal 33, wherein first direction, second direction and third direction hang down mutually two-by-two
Directly, three directions can intersect at same point, can also intersect at a point two-by-two.It can make third pedestal 34 by said mechanism
It is relatively moved in three mutually orthogonal directions relative to adjustment base 31 namely above-mentioned each adjustment parameter includes three corresponding
Shift value on direction.
When PET image-forming assemblies 20 are connected with regulating mechanism 30, adjustment base 31 is fixedly connected with PET pedestals 23, third
Pedestal 34 is fixedly connected with PET pedestals 23, it is of course also possible to third pedestal 34 be omitted, directly by module fixed ring 22 along third
Direction is slidably connected to the second pedestal 33.When CT image-forming assemblies 50 are provided with regulating mechanism, adjustment base 31 connects with CT pedestals
It connects, third pedestal 34 is connect with CT racks.
Wherein, the movement of above-mentioned first pedestal 32, the second pedestal 33 and third pedestal 34 can be driven by motor, this
When, motor and control mechanism 40 connect.
Obviously, using above-mentioned regulating mechanism 30, around capable of realizing image-forming assembly in space, upper and lower directions
Movement and inclined adjustment, to keep the adjusting of image-forming assembly more convenient.
Regulating mechanism 30 can also include tilting component, runner assembly etc..
Above-mentioned steps S200 can specifically include：
S212：The component on the basis of an image-forming assembly adjusts fiducial, its axis is made to be located at reference plane (such as level
Face) on；
S214：Calibration device 10 is positioned in the imaging through-hole, and calibration device 10 through each image-forming assembly at
As through-hole, wherein the placement location of calibration device 10 can be that can also use the structure of similar bracket by calibrator on sick bed
Part is put at the geometric center of image-forming assembly, and when being placed at geometric center, above-mentioned comparative structure is more acurrate, and calibration accuracy is more
It is high.
Above-mentioned steps S600 is specially：
Compare real image 70 and theoretical image 60, and judges remaining imaging in addition to fiducial according to comparison result
Whether the imaging through-hole of component is coaxial with the imaging through-hole of fiducial.
At this point, above-mentioned steps S800 is specially：
Remaining image-forming assembly in multiple image-forming assemblies in addition to fiducial is adjusted to pre-determined bit according to comparison result
It sets.
This mode is particularly suitable for the mode that CT image-forming assemblies 50 are not connected to regulating mechanism 30, tool
Specifically, when equipped with CT image-forming assemblies 50, can on the basis of CT image-forming assemblies 50 component, CT image-forming assemblies 50
Calibration device 10 is imaged with one or more PET image-forming assemblies, to obtain the real image 70 of calibration device 10, so
It uses the method for step S600 and S800 that each PET image-forming assemblies 20 are adjusted afterwards, that is, calculates relative to CT image-forming assemblies
50, each PET image-forming assembly 20 needs the adjustment parameter adjusted, then adjusts each PET imagings group according to these adjustment parameters
Part 20.
It should be noted that when medical imaging devices are PET-CT equipment, that is, include PET image-forming assemblies 20 and CT imagings
When component 50, the radioactive source in calibration device 10 is located at least in defined by institute's PET image-forming assemblies 20 and scans in through-hole, to ensure
Each PET image-forming assemblies 20 can be accurately imaged.
When including CT image-forming assemblies 50, other than above-mentioned method of adjustment, following manner can also be used to entire medicine
Imaging system is adjusted, and in this kind of mode, step S600 is different with step S800, remaining step is same as mentioned above.Step
Rapid S600 is specifically included：
S612：Respectively using CT image-forming assemblies 50, multiple PET image-forming assemblies 20 as fiducial, compare real image 70
With theoretical image 60, and compared result is analyzed, and obtains remaining in CT image-forming assemblies 50 and multiple PET image-forming assemblies 20
The adjustment parameter of image-forming assembly, the corresponding multiple adjustment parameters of same fiducial form adjustment parameter groups, by each adjustment parameter
Maximum adjustment parameter is as the first adjustment parameter in group；As shown in Fig. 2, being directed toward PET image-forming assemblies along CT image-forming assemblies 50
20 direction (i.e. the orientation of multiple PET image-forming assemblies 20) calculates respectively first using CT image-forming assemblies 50 as fiducial
PET image-forming assemblies 20 need the adjustment parameter that adjusts, these adjustment parameters form one group of adjustment parameter group, and with CT image-forming assemblies
50 is corresponding；Then, on the basis of first PET image-forming assembly 20 (PET image-forming assemblies i.e. adjacent with CT image-forming assemblies 50)
Component, calculates CT image-forming assemblies 50 and remaining each PET image-forming assembly 20 needs the adjustment parameter adjusted, these adjustment parameter shapes
At one group of adjustment parameter group, and it is corresponding with first PET image-forming assembly 20；Then, it is base with second PET image-forming assembly 20
Prospective component, calculates CT image-forming assemblies 50 and remaining each PET image-forming assembly 20 needs the adjustment parameter adjusted, these adjustment parameters
One group of adjustment parameter group is formed, and corresponding with second PET image-forming assembly 20；And so on, it obtains and is imaged with each PET
Corresponding adjustment parameter group when component on the basis of component 20；Then find out every group of adjustment parameter group (including with CT image-forming assemblies 50
Corresponding adjustment parameter group) in maximal regulated parameter as the first adjustment parameter.
S614：It, will be where the second adjustment parameter using the minimum value in each first adjustment parameter as the second adjustment parameter
Adjustment parameter group is as practical adjustments parameter group；
Step S800 is specially：
S812：Using the fiducial corresponding to the second adjustment parameter as reference, according in practical adjustments parameter group
Each adjustment parameter carries out remaining image-forming assembly that reference is removed in CT image-forming assemblies 50 and multiple PET image-forming assemblies 20
It adjusts.
Using this regulative mode, each component can be made in CT image-forming assemblies 50 and each PET image-forming assemblies 20 as far as possible
The scan axis coincidence that CT image-forming assemblies 50, multiple PET image-forming assemblies 20 are realized in small adjustable range, to make entire medicine
The adjustment of imaging system is more convenient.
The side of similar above-mentioned minimal adjustment parameter can also be used when medical imaging devices only include PET image-forming assemblies
Method, specifically, above-mentioned steps S200 is specially：
S222：Calibration device 10 is positioned over to the geometric center of any PET image-forming assemblies 20, optionally, in calibration device
10 be straight stick when, so that the mandrel line of calibration device 10 is overlapped with the scan axis of the PET image-forming assemblies 20；
Step S600 is specially：
S622：Respectively using each PET image-forming assemblies 20 as fiducial, compare real image 70 and theoretical image 60, and
Compared result is analyzed, and obtains the adjustment parameter of remaining PET image-forming assembly 20, the corresponding adjustment parameter of same fiducial
Adjustment parameter group is formed, using the maximal regulated parameter in each adjustment parameter group as third adjustment parameter.It is imaged along multiple PET
The orientation of component 20, first the component on the basis of first PET image-forming assembly 20, calculates remaining each PET image-forming assembly 20
The adjustment parameter adjusted is needed, these adjustment parameters form one group of adjustment parameter group, and opposite with first PET image-forming assembly 20
It answers；Then the component on the basis of second PET image-forming assembly 20 again calculates what remaining each PET image-forming assembly 20 needed to adjust
Adjustment parameter, these adjustment parameters form one group of adjustment parameter group, and corresponding with second PET image-forming assembly 20；With such
It pushes away, obtains by corresponding adjustment parameter group when component on the basis of each PET image-forming assembly 20；Then every group of adjustment parameter is found out
Maximal regulated parameter in group is as third adjustment parameter.
S624：It, will be where the 4th adjustment parameter using the minimum value in each third adjustment parameter as the 4th adjustment parameter
Adjustment parameter group is as practical adjustments parameter group.
At this point, step S800 is specially：
S822：Using the fiducial corresponding to the 4th adjustment parameter as reference, according in practical adjustments parameter group
Each adjustment parameter in multiple PET components 20 remove reference remaining PET image-forming assembly 20 be adjusted.
Using this regulative mode, each PET image-forming assemblies 20 can be made to be realized in adjustable range as small as possible multiple
The scan axis of PET image-forming assemblies 20 overlaps, to keep the adjustment of entire medical image system more convenient.
It is of course also possible to directly using any of the above-described group of adjustment parameter group as practical adjustments parameter group, with the adjustment parameter group
On the basis of corresponding PET image-forming assemblies 20, remaining PET image-forming assembly 20 is adjusted.
Further, can also include after above-mentioned steps S800：
S900：Multiple image-forming assemblies are simultaneously imaged calibration device 10, obtain the new real image 70 of calibration device；
S910：Compare the theoretical image 60 of new real image 70 and calibration device 10,
If the matching degree of new real image 70 and theoretical image 60 is more than or equal to preset value, such as 95%, then completion is adjusted；
If new real image 70 and the matching degree of theoretical image 60 are less than 95%, using new real image as real image
70, return to step S600 is executed.
Using the above method, carry out multiplicating adjustment, to improve each PET image-forming assemblies 20 scan axis coincidence
Degree.
It it should be noted that when including CT image-forming assemblies 50, can also repeatedly be adjusted, specifically refer to above-mentioned retouch
It states, which is not described herein again.
The foregoing is merely the preferred embodiments of the application, are not intended to limit this application, for the skill of this field
For art personnel, the application can have various modifications and variations.Within the spirit and principles of this application, any made by repair
Change, equivalent replacement, improvement etc., should be included within the protection domain of the application.
Claims (10)
1. a kind of medical image system, which is characterized in that including calibration device and medical imaging devices, the medical imaging devices
Including：
Multiple image-forming assemblies, each image-forming assembly have imaging through-hole, and multiple image-forming assemblies are along the imaging through-hole
Axial direction be arranged in order, for positioned at it is described imaging through-hole in calibration device be imaged；
Control mechanism is electrically connected with multiple image-forming assemblies, for controlling multiple image-forming assemblies simultaneously to the calibration
Device is imaged, and the real image of the calibration device, and the reason of the real image and the calibration device are obtained
By image, determine whether the axis of multiple image-forming assemblies overlaps according to comparison result.
2. medical image system according to claim 1, which is characterized in that further include regulating mechanism, respectively with multiple institutes
Image-forming assembly is stated to connect with the control mechanism；The control mechanism controls the regulating mechanism also according to the comparison result will
Each image-forming assembly is adjusted to precalculated position.
3. medical image system according to claim 1, which is characterized in that the image-forming assembly includes along the axial string
Multiple PET image-forming assemblies of row arrangement.
4. medical image system according to claim 1, which is characterized in that the image-forming assembly includes along the axial string
The CT image-forming assemblies and at least one PET image-forming assemblies of row arrangement.
5. medical image system according to claim 4, which is characterized in that the calibration device runs through the CT imagings group
The imaging through-hole of part and the PET image-forming assemblies, and the calibration device is located at the portion of the imaging through-hole of the PET image-forming assemblies
It includes radioactive source to divide.
6. medical image system according to claim 1, which is characterized in that the calibration device includes hollow parts and sets
The radioactive source being placed in the hollow parts.
7. medical image system according to claim 6, which is characterized in that the calibration device further includes solid section,
Axial direction of the solid section with the hollow parts along the through-hole is arranged.
8. a kind of method of adjustment of such as claim 1-7 any one of them medical image systems, the medical image system packet
Medical imaging devices are included, the medical imaging devices include the multiple image-forming assemblies being arranged in order, each image-forming assembly tool
There is imaging through-hole, which is characterized in that the method for adjustment includes：
S200：Calibration device is positioned in the imaging through-hole；
S400：Multiple image-forming assemblies are simultaneously imaged the calibration device, obtain the practical figure of the calibration device
Picture；
S600：The theoretical image for comparing the real image and the calibration device, according to comparison result determine it is multiple it is described at
As whether the axis of component overlaps.
9. method of adjustment according to claim 8, which is characterized in that the medical image system further includes regulating mechanism,
It is connect respectively with multiple image-forming assemblies；Further include after the step S600:
S800：Each image-forming assembly is adjusted to precalculated position according to the comparison result.
10. method of adjustment according to claim 9, which is characterized in that the step S200 includes：
S212：The component on the basis of an image-forming assembly adjusts the fiducial, its axis is made to be located in reference plane；
S214：The calibration device is positioned in the imaging through-hole, and the calibration device through each image-forming assembly at
As through-hole；
The step S600 is specially：
Compare the real image and the theoretical image, and is judged described in remaining in addition to fiducial according to comparison result
Whether the imaging through-hole of image-forming assembly is coaxial with the imaging through-hole of fiducial；
The step S800 is specially：
Remaining described image-forming assembly in multiple image-forming assemblies in addition to fiducial is adjusted according to the comparison result
To precalculated position.
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