CN108652656A - Complex detector, Tomography system and method - Google Patents
Complex detector, Tomography system and method Download PDFInfo
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- CN108652656A CN108652656A CN201810487026.1A CN201810487026A CN108652656A CN 108652656 A CN108652656 A CN 108652656A CN 201810487026 A CN201810487026 A CN 201810487026A CN 108652656 A CN108652656 A CN 108652656A
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/032—Transmission computed tomography [CT]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/42—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 or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis 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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/44—Constructional features of apparatus for radiation diagnosis
- A61B6/4429—Constructional features of apparatus for radiation diagnosis related to the mounting of source units and detector units
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/50—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications
- A61B6/502—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment specially adapted for specific body parts; specially adapted for specific clinical applications for diagnosis of breast, i.e. mammography
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/52—Devices using data or image processing 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 or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/52—Devices using data or image processing specially adapted for radiation diagnosis
- A61B6/5205—Devices using data or image processing specially adapted for radiation diagnosis involving processing of raw data to produce diagnostic data
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Abstract
The present invention relates to a kind of complex detector, for receiving ray and the ray being converted to electric signal generating image, which is characterized in that if the detector including dry splice, gap is arranged between the splicing detector.The present invention also provides a kind of Tomography system and Tomography methods.And the present invention splices the detector of small size according to predetermined design, can substitute monoblock panoramic detector device and carry out X-ray detection X.Also disclose the imaging system and method using the complex detector.
Description
Technical field
The present invention relates to medical imaging device technical field, more particularly to a kind of complex detector and a kind of use are affiliated multiple
Close detector carry out body it is laminated at imaging system and method.
Background technology
Industrially internal detection is carried out using radial imaging or medically detects body foci, is that ray is more normal
The occupation mode of rule.When in use, it generally uses radiographic source to irradiate examined object, such as human body, specifically detects human body
Specific area to be tested, such as detect mammary gland.Then panadaptor is used to receive the ray across examined object to life
At image.Currently a popular image receptor uses panorama Flat digital detector, and ray is converted into electric signal, generates number
Image.Here " panorama " means to cover entire detected object, it is desirable that detector area is larger.For example, digital galactophore machine mesh
The preceding effective imaging area of detector is 24cm x 30cm.
However, large-sized panorama digital detector cost is more expensive, and some small size detectors (such as photon
Counter-type) there is extraordinary imaging characteristic, but be difficult to accomplish large area.
Tomography technology provides the possibility for effectively using non-panoramic detector.
Invention content
The present invention provides a kind of using multiple non-panoramic detectors realization body layer synthetic methods.Multiple non-panoramic detectors
The complex detector for being spliced to form enough image receiving areas is carried out, gap is set between non-panoramic splicing detector.
Purpose according to the present invention provides a kind of complex detector, for receiving ray and the ray being converted to electricity
Signal is to generate image, if including the detector of dry splice, gap is arranged between the detector.
The gap between the distribution and splicing detector of the splicing detector is according to design in one of the embodiments,
Setting.
Splicing detector type used is identical or different in one of the embodiments,.
The splicing detector is X-ray detector or gamma ray detector in one of the embodiments,.
The splicing detector forms the detector array arranged with X rows and Y in one of the embodiments, wherein X
>=1, Y >=1.
Purpose according to the present invention also provides a kind of Tomography system, including：
Radiographic source, for being scanned or ray emission in different angle divergent-ray；
Detector, the detector is any complex detectors of claim 1-5, for receiving the radiographic source
The ray of transmitting；
Imaging device, the radial imaging for being received according to the complex detector.
The radiographic source is arranged with complex detector according to predetermined way in one of the embodiments, so as to be illuminated
Any point in position will not angled all fallen in the gap between splicing detector by radiographic source projection.
Preset distance is arranged away from the position to be detected in the complex detector in one of the embodiments,.
In one of the embodiments, the Tomography system be suitable for mammary gland body it is laminated at and body other position bodies
It is laminated at；And/or
It is imaged suitable for CT.
Purpose according to the present invention also provides a kind of Tomography method, for according to any of the above-described body layer at
It is laminated at including the following steps that the image that is obtained when being scanned as system carries out body：
In each projection angle, the projected image that each splicing detector obtains in complex detector array, and root are obtained
The image obtained is combined into " the spliced panoramic image " of the angle according to effective imaging area physical location of each splicing detector,
Gap between effective imaging area of splicing detector is also labeled in " spliced panoramic image "；
When carrying out three-dimensional reconstruction, the position of each individual layer pixel is calculated；
For certain individual layer pixel, according to its position, in each projection angle, the pixel projection is calculated to " spliced panoramic
Position in image "：If the position obtains picture signal in the effective imaging area of some splicing detector；If the position
The gap between splicing detector is set, then does not do signal record；
For certain individual layer pixel, after the signal for obtaining all projection angles, the picture for generating the body layer pixel is calculated
Element value.
The beneficial effects of the present invention are：The above-mentioned complex detector of the present invention, if including the detector of dry splice, the spelling
It connects and gap is set between detector, for receiving ray and the ray being converted to electric signal generating image.Use this
The Tomography system of complex detector, and Tomography method is carried out using the image that the Tomography system obtains, make
Small detector-with high imaging characteristic can fully be applied to body by the complex detector being spliced with small detector
It is laminated at imaging applications.
Description of the drawings
Fig. 1 is the schematic diagram of the complex detector of one embodiment of the invention；
Fig. 2 is the schematic diagram of the complex detector of another embodiment of the present invention；
Fig. 3 is the Tomography system module figure of one embodiment of the invention；
Fig. 4 is Tomography system A angle scanning schematic diagrames of the present invention；
Fig. 5 is Tomography system B angle scanning schematic diagrames of the present invention；
Fig. 6 is Tomography system C angle scanning schematic diagrames of the present invention；
Fig. 7 is the Tomography method flow diagram of one embodiment of the invention.
Specific implementation mode
As previously mentioned, large-sized panorama digital detector cost is more expensive, and some small size detectors (such as
Photon counting type) there is extraordinary imaging characteristic, but be difficult to accomplish large area.And present invention uses complex detector,
It splices the detector of small size according to pre-defined rule, can substitute panoramic detector device and carry out X-ray detection X imaging.Also
Disclose using this-imaging system of complex detector, pass through the position being arranged between radiographic source and complex detector, radiographic source
Multi-angle scanning is carried out, can also be obtained and using the almost the same image of panoramic detector device effect.When Tomography, with certain
Signal-to-noise ratio is cost, has won the effect for substituting large area panoramic detector device using multiple small-sized splicing detectors, has made low cost
The use of small detector is possibly realized, and reduces the production cost of detector, can also be made full use of with high imaging characteristic
Small detector keeps body laminated more flexible at the design of imaging technique.
The present invention is described more fully with below with reference to attached drawing, shows the exemplary embodiment party of the present invention in the accompanying drawings
Formula.As those skilled in the art will appreciate that, described embodiment can be changed in a variety of ways, own
Modification is without departure from the spirit or scope of the present invention.
1-7 elaborates technical scheme of the present invention below in conjunction with the accompanying drawings.
Shown in Fig. 1, be one embodiment of the invention-schematic diagram of complex detector；
Shown in Fig. 2, be another embodiment of the present invention-schematic diagram of complex detector；
It is the Tomography system module figure of one embodiment of the invention shown in Fig. 3；
It is Tomography system A angle scanning schematic diagrames of the present invention shown in Fig. 4；
It is Tomography system B angle scanning schematic diagrames of the present invention shown in Fig. 5；
It is Tomography system C angle scanning schematic diagrames of the present invention shown in Fig. 6；
It is the Tomography method flow diagram of one embodiment of the invention shown in Fig. 7.
Referring to Fig. 1, for one embodiment of the invention-complex detector 100, the detector 100 include several small sizes
Splicing detector 120, these small size splicing detectors 120 are spliced to form large-sized detector, for substituting large scale
Panoramic detector device, receive ray simultaneously by the ray be converted to electric signal generate image.With reference to figure 1-2, set between detector
Set gap.Clearance distance is smaller or the area in gap is smaller.Also, the gap between detector is consistent as possible, identical
Or it is calculated according to being pre-designed.Alternatively, can be connected by way of conventional between detector 120, such as bond.
Present invention uses-complex detectors, and the detector of small size is spliced according to pre-defined rule, can be replaced
X-ray detection X is carried out for panoramic detector device.Complex detector of the present invention substitutes large area panoramic detector using multiple minimonitors
The effect of device avoids directly reducing the production cost of detector using expensive panorama digital detector, can also use tool
The small detector for having high imaging characteristic, can make imaging effect to a certain extent becomes more preferable, more flexible.
Wherein, above-mentioned detector type material is identical or different.According to the characteristic of radiographic source, detector can be set
Material.When radiographic source is x-ray, detector is x-ray detector.When radiographic source is gamma-rays, detector is gamma-ray detection
Device.Alternatively, in order to improve the application of function of detector, material is different between adjacent detector can be arranged, such as adjacent materials
Respectively x-ray detector and gamma ray detector.In this manner it is possible to detect X-ray and gamma-rays simultaneously.In another embodiment
In, it is identical or different that adjacent detector type can also be set.In this way, the panoramic detector device of the same splicing can be used for
Receive different types of ray of different radiographic source transmittings.
Wherein, the detector can form the detector array with X rows and Y row, wherein X >=1, Y >=1.Reference chart
2, for the different implementation embodiments of the present invention.Fig. 2 is expressed as X=2, detector when Y=2.In other embodiments, X and Y
Numerical value can be changed according to actual demand.
In this way, change the detector field conventional probes mode of production, not only can cost-effective reduction manufacture difficulty,
Small and good detector can also be integrated.Also, the design method of detector application mode and imaging system can also be increased.
It is a kind of Tomography system 200 of the present invention with reference to figure 3, including：Radiographic source 210, detector 230, imaging device
250.Wherein, radiographic source 210, for being scanned or ray emission in different angle divergent-ray；Detector 230, the spy
Survey device be foregoing description-complex detector, the ray for receiving radiographic source transmitting；Imaging device 250 is used for basis
The radial imaging that the complex detector receives.
Wherein, the radiographic source 210 is arranged with detector 230 according to predetermined way, so that any in position to be illuminated
Will not angled all fallen in gap between splicing detector by radiographic source projection.When radiographic source is X-ray source, use
When carrying out galactophore scanning, it is described in detail for shown in attached drawing 4-6.But this of the invention description be not to body layer at
As the limitation of system 200, other body layer synthetic technologys is readily applicable to, or be applied to the fields CT, uses discrete detector
(having interval) completes CT imagings.
With reference to figure 4-6, for the schematic diagram that (tri- angles of A, B, C) are scanned from different perspectives.Such setting, be for
It prevents from position to be detected that cannot be spliced detector completely in scanning to receive.Can be with refer to the attached drawing 4-6, in Fig. 4, this
Lesion information is received by the 1st small-sized splicing detector of left number；In Figure 5, this lesion information is by the 2nd small-sized splicing of left number
Detector receives；In figure 6, this lesion information projects in clearance, is not spliced detector and collects.Therefore, originally
The such setting of invention so that, although existence information is omitted in certain Angles Projections, but as long as ensure to have it is enough, comprising should
Effective projection of lesion, body is laminated can to carry out at three-dimensional-reconstruction.For example, M projection is acquired altogether, wherein N number of projection is wrapped
Information (effectively projection) containing lesion, the lesion information projects splicing detector gap in L projection, then for the lesion
Image reconstruction, only need to use it is N number of " effectively projection " (information for include lesion) progress.Imaging system of the present invention 200 is with certain
Information loss is cost, has won the effect that monoblock large area panoramic detector device is substituted using multiple small-sized splicing detectors.
Wherein, the detector 230 is away from the position preset distance to be detected.Such setting is certain in order to prevent waits for
Detection position is in the interval region of splicing detector forever.Such as when carrying out breast cancer, imaging system of the present invention needs
A small distance is kept between mammary gland and detector, prevents the interval region that certain positions are in splicing detector forever.
Also, the distance is smaller, can't imaged image signal reception.
It, can be by realizing pre- spacing in setting baffle on the complex detector specific to the component of Tomography system
From setting.Wherein, baffle is used to support position to be detected；Pre- spacing is set between the baffle and the complex detector
From.
It is a kind of Tomography method 300 of the present invention, for being swept according to above-mentioned Tomography system 200 with reference to figure 7
It is laminated at this method comprises the following steps that the image obtained when retouching carries out body：
Step S320：In each projection angle, the projection that each splicing detector obtains in complex detector array is obtained
Image, and the image obtained is combined by " splicing for the angle according to effective imaging area physical location of each splicing detector
Panoramic picture ", the gap between the effective imaging area of splicing detector are also labeled in " spliced panoramic image ".
Step S340：When carrying out three-dimensional reconstruction, the position of each individual layer pixel is calculated.
Step S360：For certain individual layer pixel, according to its position, in each projection angle, calculates the pixel projection and arrive
Position in " spliced panoramic image "：If the position obtains picture signal in the effective imaging area of some splicing detector；
If gap of the position between splicing detector, does not do signal record.
Step S380：For certain individual layer pixel, after the signal for obtaining all projection angles, calculates and generate the body layer
The pixel value of pixel.
Wherein, the step of obtaining the pixel value of each individual layer pixel, specifically includes：
Step S382：Obtain in each angle acquired image with the relevant signal numerical value of the pixel.
Step S384：If in some angle, if the projection of the pixel falls into the gap of the effective imaging area of detector,
There is no information in the angle.
Step S386：The effective information that all angles obtain is calculated to the pixel value of the body layer pixel.
With reference to figure 4-6, for the schematic diagram that (tri- angles of A, B, C) are scanned from different perspectives.Such setting, be for
It prevents from position to be detected that cannot be spliced detector completely in scanning to receive.Can be with refer to the attached drawing 4-6, in Fig. 4, this
Lesion information is received by the 1st small-sized splicing detector of left number；In Figure 5, this lesion information is by the 2nd small-sized splicing of left number
Detector receives；In figure 6, this lesion information projects in gap, is not collected by any splicing detector.Therefore, originally
Invention imaging method, although existence information is omitted in certain Angles Projections, but as long as ensureing to have enough, comprising the lesion
Projection, the reconstruction of three-dimensional mammary gland can carry out.For example, M projection is acquired altogether, wherein N number of project the information for including lesion,
The lesion information projects splicing detector gap in L projection, then for the image reconstruction of the lesion, need to only use N number of
" effectively " (information for including lesion) carries out for projection.Imaging method of the present invention has won use using certain information loss as cost
Multiple minimonitor splicings substitute the effect of large area monoblock panoramic detector device.
The detector of small size is spliced according to pre-defined rule, can be substituted by use-complex detector of the present invention
Panoramic detector device carries out X-ray detection X.The imaging system of the present invention-complex detector, by the way that radiographic source and complex detector is arranged
Between position, radiographic source carries out multi-angle scanning, can also obtain with using the almost the same image of panoramic detector device effect.
When Tomography method Tomography of the present invention, using certain information loss as cost, wins and spelled using multiple minimonitors
The effect for large area monoblock panoramic detector device is taken over, the production cost of detector is reduced, can also use has high imaging
The small detector of characteristic, making imaging effect to a certain extent can become more preferable.
In addition, Tomography system and method for the present invention be suitable for mammary gland body it is laminated at and other position bodies of body it is laminated
It is imaged at or suitable for CT.Technology provided by the invention is applicable not only to medical image, applies also for industry, Safety Industry etc.
Technical field.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of complex detector, for receiving ray and the ray being converted to electric signal generating image, feature
It is, if including the detector of dry splice, gap is set between the detector.
2. complex detector according to claim 1, which is characterized in that the distribution and splicing detection of the splicing detector
Gap between device is arranged according to design.
3. complex detector according to claim 1, which is characterized in that splicing detector type used is identical or not
Together.
4. complex detector according to claim 1 or 3, which is characterized in that the splicing detector is X-ray detector
Or gamma ray detector.
5. complex detector according to claim 1, which is characterized in that the splicing detector is formed to be arranged with X rows and Y
Detector array, wherein X >=1, Y >=1.
6. a kind of Tomography system, which is characterized in that including：
Radiographic source, for being scanned or ray emission in different angle divergent-ray；
Detector, the detector is any complex detectors of claim 1-5, for receiving the radiographic source transmitting
Ray；
Imaging device, the radial imaging for being received according to the complex detector.
7. Tomography system according to claim 6, which is characterized in that the radiographic source is with complex detector according to pre-
Determine mode to be arranged, so that any point in position to be illuminated will not splice detection in angled all fallen within by radiographic source projection of institute
In gap between device.
8. Tomography system according to claim 6, which is characterized in that the complex detector is away from the portion to be detected
Position setting preset distance.
9. Tomography system according to claim 6, which is characterized in that the Tomography system is suitable for mammary gland body
It is laminated at and other position bodies of body it is laminated at；And/or
It is imaged suitable for CT.
10. a kind of Tomography method obtains when for being scanned according to any Tomography systems of claim 6-9
The image that takes carry out body it is laminated at, which is characterized in that include the following steps：
In each projection angle, the projected image that each splicing detector obtains in complex detector array is obtained, and according to each
The image obtained is combined into " the spliced panoramic image " of the angle by effective imaging area physical location of a splicing detector, splicing
Gap between effective imaging area of detector is also labeled in " spliced panoramic image "；
When carrying out three-dimensional reconstruction, the position of each individual layer pixel is calculated；
For certain individual layer pixel, according to its position, in each projection angle, the pixel projection is calculated to " spliced panoramic image "
In position：If the position obtains picture signal in the effective imaging area of some splicing detector；If the position is being spelled
The gap between detector is connect, then does not do signal record；
For certain individual layer pixel, after the signal for obtaining all projection angles, the pixel value for generating the body layer pixel is calculated.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021008054A1 (en) * | 2019-07-18 | 2021-01-21 | 江苏康众数字医疗科技股份有限公司 | Spliced flat panel detector and splicing method therefor, and imaging system and imaging method therefor |
| CN118236081A (en) * | 2024-05-28 | 2024-06-25 | 苏州益腾电子科技有限公司 | Mammary gland CT system and mammary gland examining table |
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