CN106443754B - Radioscopic image capturing apparatus - Google Patents
Radioscopic image capturing apparatus Download PDFInfo
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- CN106443754B CN106443754B CN201611024811.0A CN201611024811A CN106443754B CN 106443754 B CN106443754 B CN 106443754B CN 201611024811 A CN201611024811 A CN 201611024811A CN 106443754 B CN106443754 B CN 106443754B
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- image capturing
- capturing apparatus
- radioscopic image
- ray
- sensor array
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/161—Applications in the field of nuclear medicine, e.g. in vivo counting
- G01T1/164—Scintigraphy
- G01T1/1641—Static instruments for imaging the distribution of radioactivity in one or two dimensions using one or several scintillating elements; Radio-isotope cameras
- G01T1/1642—Static instruments for imaging the distribution of radioactivity in one or two dimensions using one or several scintillating elements; Radio-isotope cameras using a scintillation crystal and position sensing photodetector arrays, e.g. ANGER cameras
Abstract
The present invention provides a kind of radioscopic image capturing apparatus, it will mainly be combined with the secondary fluor for the columnar thin-film being made of cesium iodide applied in radioscopic image capturing apparatus as the flash fiber panel of primary scintillator, X-ray is after secondary fluor is incident, most of X-ray is converted into visible light one, and primary scintillator is not traveled further by the X-ray that secondary fluor absorbs, and visible light two is converted into primary scintillator effect, finally, visible light one and visible light two all enter sensor array surface by the total reflection effect of the guide lighting channel of primary scintillator, so, it may decrease to the X-ray up to sensor array surface, improve the radiation lifetime of sensor, and reduce the random noise of X-ray generation；And using the secondary fluor higher than the flash fiber panel light yield as primary scintillator as the original incident face of X-ray, and it can be absorbed and converted to visible light in the primary scintillator without the partial x-ray that the secondary fluor absorbs, and then improve the light output and sensitivity of detector.
Description
Technical field
The present invention relates to a kind of radiation detector technical fields, are applied to X-ray flat panel detector more particularly to one kind
In radioscopic image capturing apparatus.
Background technique
With the development of medical technique level, the popularity rate of X-ray flat panel detector clinically is greatly improved.
Requirement of the clinician to the image that detector system obtains is also more and more harsh.Flat panel detector substitutes pervious film cassette
Become major radiation with IP plate and checks image-forming block.
And the image capture part as flat panel detector also has many research, such as Chinese patent in industry in recent years
Document (CN 102934173A), american documentation literature (US 6635877B2) and american documentation literature (US 5554850) are all
There is the disclosure of this respect technology.
Specifically, Chinese patent literature (CN 102934173A) is all taken off with american documentation literature (US 6635877B2)
Reveal a kind of by cesium iodide (Cerium iodide；CsI) scintillator and fibre faceplate (Fiber Optical Plate；FOP)
The scintillator panel for combining and being formed.Wherein, Chinese patent literature (CN 102934173A) is to disclose a kind of scintillator face
Then plate uses both sides tape by cesium iodide scintillator by growing columnar cesium iodide (CsI) scintillator on aluminum substrate
It is buckled on fibre faceplate (FOP) and forms the scintillator panel；And american documentation literature (US 6635877B2) then discloses
Including having the fibre faceplate (FOP) for penetrating light, the scintillator that formation is directly deposited on the fibre faceplate, covering the scintillator
First layer Parylene film, the aluminium film formed on the first layer Parylene film and the second layer formed on the aluminum film group
The scintillator panel of Rayleigh film.
In both of the aforesaid patent document, the element for directly participating in converting X-ray to visible light all only has cesium iodide flashing
Device, fibre faceplate only acts as the effect of the light conduction pathway of visible light, and the setting of the thickness of cesium iodide scintillator is usually to have
It is a certain range of, usually 400~600 μm, if thickness is more than this value range, although detector sensitivity can be improved,
But spatial resolution can decline instead, therefore this value range be can balanced detector sensitivity and spatial resolution and
Setting, but X-ray can not be completely converted into visible light by the cesium iodide scintillator under this thickness, still there is 10~30%
X-ray is not absorbed by cesium iodide scintillator, it is clear that greatly reduces the light output and sensitivity of detector；In addition, being converted into
The part of visible light is to be conducted by fibre faceplate further progress, and fibre faceplate (FOP) is usually by core glass, light absorption
Three kinds of materials such as glass and skin glass as covering are according to made of certain proportion clinkering, the folding of core glass therein
The refractive index that rate is greater than covering skin glass is penetrated, due to total reflection, being only located at the light other than critical angle could transmit in a fiber,
So this scintillator panel for combining cesium iodide scintillator and fibre faceplate, inevitably reduces the output of light,
And then reduce detector sensitivity；Furthermore unabsorbed X-ray reaches the sensor array surface of detector, can be to biography
Sensor causes radiation injury, and then reduces the detector service life, meanwhile, also hole and electricity can be inspired in the silicon substrate of detector
Son is right, and hole and electronics can cause electric signal to enhance, be shown as bright on the image in the photodiode for entering detector
Point, and random distribution, increase the noise of image, and this X-ray random noise is particularly evident for CMOS flat panel detector.
In addition, another american documentation literature (US 5554850) is then to directly adopt flash fiber panel (Fiber
Optical Scintillation Plate；FOSP it) is used as scintillator and transmission line, but due to flash fiber panel base
Volume density is low, constituent as flash fiber panel --- core glass is amorphous phase, is used as scintillator, produces with X-ray
Raw interaction is limited, and relative to the scintillator of cesium iodide material, light yield is smaller, so that detector sensitivity will not
It is too high.
Therefore, it is necessary to a kind of radioscopic image capturing apparatus for overcoming prior art disadvantages is proposed, to solve existing skill
It is insufficient to X-ray absorption by scintillator of cesium iodide in art, using flash fiber panel as scintillator light output it is limited, in conjunction with iodine
The problems such as light output and sensitivity decrease of change caesium scintillator and fibre faceplate.
Summary of the invention
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of radioscopic image capturing apparatus,
And then improve the light output and sensitivity of detector.
Another object of the present invention is to provide a kind of radioscopic image capturing apparatus, to avoid because X exists in the prior art
Radiation absorption is insufficient and directly reaches the sensor array surface of detector, causes radiation injury to sensor, and then reduce
The service life of sensor, while the problem of also increase the random noise of X-ray.
In order to achieve the above objects and other related objects, the present invention provides a kind of radioscopic image capturing apparatus, is applied to
In X-ray flat panel detector, the radioscopic image capturing apparatus includes shell, the sensor array for being set to the housing bottom
Column and cover, which is characterized in that the radioscopic image capturing apparatus further include: primary scintillator is bonded by binder
It is fixed on the sensor array, wherein the primary scintillator is flash fiber panel (Fiber Optical
Scintillation Plate；FOSP)；Secondary fluor, be formed in by hot evaporation mode the primary scintillator not with
The side of sensor array bonding and supply the X-ray incident, and the secondary fluor and be made of multiple columns；
Waterproof membrane is in the gap between the surface and each column for depositing to the secondary fluor；Reflectance coating is to cover and wrap
Wrap up in the periphery of the secondary fluor；And buffer layer, it is to be located between the reflectance coating and the cover.
Preferably, the flash fiber panel is bundled into a branch of fibre optic plate formed by heating pressurization by multifiber,
And the optical fiber of the flash fiber panel is to be formed by core glass, skin glass and light absorption glass according to certain proportion clinkering
, and the core glass is doped with rare earth luminous ion.And the rare earth luminous ion may be, for example, cerium ion or terbium ion.?
In the present embodiment, the diameter range of the optical fiber is 6~25 μm, and the thickness range of the flash fiber panel is 2~10mm.This
Outside, which may be, for example, Optical transparent adhesive (Optically Clear Adhesive；OCA).And the secondary fluor is
The columnar thin-film being made of the cesium iodide doped with thallium ion.In the present embodiment, the thickness range of the columnar thin-film be 400~
600μm.The waterproof membrane is made of parylene film.The reflectance coating may be, for example, aluminium film or silverskin, in this implementation
In example, the thickness range of the aluminium film is 100~150 μm.The buffer layer may be, for example, foam.The sensor array may be, for example, non-
Crystal silicon sensor array, CMOS sensor array or ccd sensor array etc..The cover may be, for example, carbon fiber board, and
In the present embodiment, the thickness range of the carbon fiber board is 1.0~1.5mm.
As described above, the present invention proposes a kind of radioscopic image capturing apparatus, mainly by the flashing as primary scintillator
Fibre faceplate is combined with the secondary fluor for the columnar thin-film being made of cesium iodide applied in radioscopic image capturing apparatus,
It due to the introducing of flash fiber panel, that is, may decrease to the X-ray up to sensor array surface, improve the radiation longevity of sensor
Life, and reduce the random noise of X-ray generation；And by higher than the flash fiber panel light yield as primary scintillator
Original incident face of two scintillators as X-ray, and the unabsorbed X in part in the X-ray through secondary fluor incidence
Ray further can be absorbed and converted to visible light in the primary scintillator, can the opposite light output for improving detector and
Sensitivity.
Detailed description of the invention
Fig. 1 is shown as the structure sectional view of radioscopic image capturing apparatus of the invention.
Fig. 2 is shown as that the schematic illustration of X-ray is absorbed and converted using radioscopic image capturing apparatus of the invention.
Component label instructions
1 shell
2 sensor arrays
3 primary scintillators
31 rare earth luminous ions
4 secondary fluors
5 waterproof membranes
6 reflectance coatings
7 buffer layers
8 covers
x1、x2、x1a、x1bX-ray
V1, v2 visible light
Specific embodiment
Illustrate embodiments of the present invention below by way of specific specific example, those skilled in the art can be by this specification
Other advantages and efficacy of the present invention can be easily understood for disclosed content.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also based on different viewpoints and application, without departing from
Various modifications or alterations are carried out under spirit of the invention.It should be noted that in the absence of conflict, following embodiment and implementation
Feature in example can be combined with each other.
It should be noted that illustrating the basic structure that only the invention is illustrated in a schematic way provided in following embodiment
Think, only shown in schema then with related component in the present invention rather than component count, shape and size when according to actual implementation
Draw, when actual implementation kenel, quantity and the ratio of each component can arbitrarily change for one kind, and its assembly layout kenel
It is likely more complexity.
Referring to Fig. 1, the present invention provides a kind of radioscopic image capturing apparatus, it is applied in X-ray flat panel detector,
As shown in Figure 1, radioscopic image capturing apparatus of the invention include shell 1, the sensor array 2 for being set to 1 bottom end of shell,
The primary scintillator 3 being fixed on the sensor array 2, the secondary fluor 4, the waterproof membrane that are set on the primary scintillator 3
5, reflectance coating 6, buffer layer 7 and cover 8.I.e. cooperation Fig. 2 carries out specifically radioscopic image capturing apparatus of the invention below
It is bright.
As shown in Figure 1, the shell 1 may be, for example, aluminum alloy materials, but not limited to this.
The sensor array 2 may be, for example, amorphous silicon detector array, CMOS sensor array or ccd sensor battle array
Column.
The primary scintillator 3 is adhered and fixed by an adhesive on the sensor array 1, wherein the primary scintillator 3
It is flash fiber panel.In more detail, which is that a branch of shape by heating pressurization is bundled by multifiber
At fibre optic plate, and the optical fiber of the flash fiber panel is to be matched by core glass, skin glass and light absorption glass according to certain
Than made of clinkering, and the core glass, doped with rare earth luminous ion 31 as shown in Figure 2, which can example
For example cerium ion or terbium ion, because that can not will not inhaled by the secondary fluor 4 in the core glass doped with rare earth luminous ion
The X-ray of receipts is converted into visible light, and then improves the light output and sensitivity of detector, while can also act as guide lighting channel,
The crosstalk between adjacent beams is prevented, to improve resolution ratio；In addition, in the present embodiment, the optical fiber of the flash fiber panel
Diameter range is 6~25 μm, and the thickness range of the flash fiber panel is 2~10mm, which may be, for example, optical lens
Gelatin.
The secondary fluor 4 is to be formed in the primary scintillator 3 by hot evaporation mode not bond with the sensor array 2
Side and supply the X-ray incident, and the secondary fluor 4 is made of multiple columns.Preferably, the secondary fluor 4
It is the columnar thin-film being made of the cesium iodide doped with thallium ion, and the thickness range of the columnar thin-film is 400~600 μm, but
It is not limited, which can also have the columnar thin-film of the iodide composition doped with other ions.
The waterproof membrane 5 is in the gap between the surface and each column for depositing to the secondary fluor 4.Waterproof membrane is
It is made of parylene film, in more detail, which is using vapor deposition ((Chemical Vapor
Deposition；Parylene film is deposited to the seam between the surface and each column of secondary fluor 4 by method CVD)
In gap, make its deliquescence to prevent water gas from entering in the secondary fluor 4.
The reflectance coating 6 is the periphery for covering and wrapping up the secondary fluor 4.Wherein, the reflectance coating 6 may be, for example, aluminium film or
Person's silverskin, reflectivity are typically up to 90% or more, visible reflectance caused by secondary fluor 4 can be made it into
In primary scintillator 3, it is preferable that the thickness range of the aluminium film is 100~150 μm best.
The buffer layer 7 is located between the reflectance coating 6 and the cover 8, to buffer the pressure from cover 8.At this
In embodiment, which may be, for example, foam, and but not limited to this, also may be, for example, the material that other can play a buffer role in
Matter.
In the present embodiment, which may be, for example, carbon fiber board, have both some strength and toughness, and the carbon fiber board
Thickness range be 1.0~1.5mm.
How X to be penetrated using the secondary fluor 4 and the primary scintillator 3 realization for the more detailed understanding application present invention
The absorption and conversion operation of line cooperate Fig. 2 to be illustrated below, as shown, X-ray is incident to the secondary fluor 4 in advance,
Most of X-ray x1 is incident in each column of the secondary fluor 4, also has partial x-ray x2 to be incident on second sudden strain of a muscle
Between each column of bright body 4 (i.e. at the space filled with waterproof membrane 5), it is clear that be incident on each column of the secondary fluor 4
X-ray x2 between body can not be absorbed by the secondary fluor 4, but be entered directly into the primary scintillator 3, be entered
The X-ray x1 being mapped in each column of the secondary fluor 4 has greatly (X-ray for having 70%~90%) X-ray
x1aIt can be absorbed and be converted into visible light v1, meanwhile, also have sub-fraction X-ray x1bIt is not absorbed by the secondary fluor 4,
And enter directly into primary scintillator 3, at this point, the unabsorbed X-ray x2 and x1 in the secondary fluor 4bIt can be at this
It has an effect in primary scintillator 3 with the rare earth luminous ion 31 in the primary scintillator 3 and is converted into visible light v2, meanwhile,
The visible light v1 that is transformed by the secondary fluor 4 and the visible light v2 being transformed by the primary scintillator 3 are
The surface of the sensor array 2 can be entered via the total reflection effect of the guide lighting channel of the primary scintillator 3.In this way, by
In the introducing of above-mentioned primary scintillator 3, that is, it may decrease to the X-ray up to sensor array surface, improve the radiation of sensor
Service life, and reduce the random noise of X-ray generation；And the X-ray absorbed without secondary fluor 4 is converted into visible light,
Improve the light output and sensitivity of detector；The optical fiber structure of primary scintillator 3 also acts as guide-lighting effect, prevents adjacent beams
Crosstalk, improve the resolution ratio of detector.
In conclusion the present invention provides a kind of radioscopic image capturing apparatus, mainly by the flashing as primary scintillator
Fibre faceplate is combined with the secondary fluor for the columnar thin-film being made of cesium iodide applied in radioscopic image capturing apparatus, X
For ray after secondary fluor, most of X-ray is converted into visible light one, and the X-ray not absorbed by secondary fluor
Primary scintillator is traveled further into, and is converted into visible light two with primary scintillator effect, finally, visible light one and visible light two
All by the total reflection effect of the guide lighting channel of primary scintillator hence into sensor array surface is arrived, in this way, due to above-mentioned
The introducing of primary scintillator may decrease to the X-ray up to sensor array surface, improve the radiation lifetime of sensor, and
Reduce the random noise that X-ray generates；And it will be converted into visible light without the X-ray that secondary fluor absorbs, improve spy
Survey the light output and sensitivity of device；The optical fiber structure of primary scintillator also acts as guide-lighting effect, prevents the crosstalk of adjacent beams, mentions
The resolution ratio of high detector.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology all without departing from the spirit and scope of the present invention, carries out modifications and changes to above-described embodiment.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should be covered by the claims of the present invention.
Claims (13)
1. a kind of radioscopic image capturing apparatus is applied in X-ray flat panel detector, the radioscopic image capturing apparatus packet
Include the sensor array and cover of shell, the bottom end for being set to the shell, which is characterized in that the radioscopic image intake
Device further include:
Primary scintillator is adhered and fixed by an adhesive on the sensor array, wherein the primary scintillator is to dodge
Bright fibre faceplate；
Secondary fluor is one for being formed in the primary scintillator by hot evaporation mode and not bonding with the sensor array
Side and supply the X-ray incident, and the secondary fluor is made of multiple columns；
Waterproof membrane is in the gap between the surface and each column for depositing to the secondary fluor；
Reflectance coating is the periphery for covering and wrapping up the secondary fluor；And
Buffer layer is located between the reflectance coating and the cover；
Wherein, the flash fiber panel is to be bundled into a branch of process by multifiber to heat the fibre optic plate for pressurizeing and being formed, and institute
The optical fiber for stating flash fiber panel is as core glass, skin glass and light absorption glass according to made of certain proportion clinkering,
And the core glass is doped with rare earth luminous ion, the optical fiber of the flash fiber panel and the column knot of the secondary fluor
Structure is correspondingly arranged up and down.
2. radioscopic image capturing apparatus according to claim 1, it is characterised in that: the rare earth luminous ion be cerium from
The one of them of son and terbium ion.
3. radioscopic image capturing apparatus according to claim 1, it is characterised in that: the diameter range of the optical fiber be 6~
25 μm, and the thickness range of the flash fiber panel is 2~10mm.
4. radioscopic image capturing apparatus according to claim 1, it is characterised in that: the binder is Optical transparent adhesive
(Optically Clear Adhesive；OCA).
5. radioscopic image capturing apparatus according to claim 1, it is characterised in that: the secondary fluor is by adulterating
The columnar thin-film for thering is the cesium iodide of thallium ion to constitute.
6. radioscopic image capturing apparatus according to claim 5, it is characterised in that: the thickness range of the columnar thin-film
It is 400~600 μm.
7. radioscopic image capturing apparatus according to claim 1, it is characterised in that: the waterproof membrane is by poly- to diformazan
What benzene film was constituted.
8. radioscopic image capturing apparatus according to claim 1, it is characterised in that: the reflectance coating is aluminium film and silver
The one of them of film.
9. radioscopic image capturing apparatus according to claim 8, it is characterised in that: the thickness range of the aluminium film is 100
~150 μm.
10. radioscopic image capturing apparatus according to claim 1, it is characterised in that: the buffer layer is foam.
11. radioscopic image capturing apparatus according to claim 1, it is characterised in that: the shell is aluminum alloy materials.
12. radioscopic image capturing apparatus according to claim 1, it is characterised in that: the sensor array is classified as amorphous silicon
The one of them of sensor array, CMOS sensor array and ccd sensor array.
13. radioscopic image capturing apparatus according to claim 1, it is characterised in that: the cover is carbon fiber board, and
The thickness range of the carbon fiber board is 1.0~1.5mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611024811.0A CN106443754B (en) | 2016-11-16 | 2016-11-16 | Radioscopic image capturing apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611024811.0A CN106443754B (en) | 2016-11-16 | 2016-11-16 | Radioscopic image capturing apparatus |
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| CN106443754A CN106443754A (en) | 2017-02-22 |
| CN106443754B true CN106443754B (en) | 2019-02-01 |
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Families Citing this family (5)
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| CN112068178B (en) * | 2019-06-10 | 2023-08-29 | 睿生光电股份有限公司 | Radiation sensing apparatus |
| CN110707117B (en) * | 2019-11-08 | 2022-07-29 | 京东方科技集团股份有限公司 | Flat panel detector |
| CN111338178B (en) * | 2020-02-19 | 2022-03-15 | 深圳市安健科技股份有限公司 | Three-dimensional scintillator fiber array X-ray detector and preparation method thereof |
| CN113933324B (en) * | 2020-06-29 | 2023-07-14 | 京东方科技集团股份有限公司 | Flat panel detector and method of manufacturing the same |
| CN113419270B (en) * | 2021-06-23 | 2022-08-30 | 中国工程物理研究院激光聚变研究中心 | Online filter stack spectrometer |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5554850A (en) * | 1994-11-04 | 1996-09-10 | Eastman Kodak Company | X-ray scintillating plate utilizing angled fiber optic rods |
| US6087665A (en) * | 1997-11-26 | 2000-07-11 | General Electric Company | Multi-layered scintillators for computed tomograph systems |
| JP3276614B2 (en) * | 1999-04-22 | 2002-04-22 | 浜松ホトニクス株式会社 | Optical element, radiation image sensor, and method of manufacturing optical element |
| CN102741941B (en) * | 2010-01-29 | 2015-04-08 | 浜松光子学株式会社 | Radiation image conversion panel |
| WO2012174509A1 (en) * | 2011-06-16 | 2012-12-20 | Suni Medical Imaging, Inc. | X-ray image sensor |
| US9770603B2 (en) * | 2013-06-13 | 2017-09-26 | Koninklijke Philips N.V. | Detector for radiotherapy treatment guidance and verification |
| CN204241697U (en) * | 2014-12-08 | 2015-04-01 | 上海太弘威视安防设备有限公司 | Three-dimensional space curved surface multi-energy scintillation detector |
| CN104820233B (en) * | 2015-05-15 | 2019-03-01 | 中国科学院高能物理研究所 | The neutron detector of scintillator arrays structure and application the scintillator arrays structure |
| CN105293905B (en) * | 2015-11-23 | 2017-10-24 | 中国建筑材料科学研究总院 | A kind of flash fiber panel and preparation method thereof |
| CN105481245B (en) * | 2015-11-23 | 2017-12-05 | 中国建筑材料科学研究总院 | Composition of scintillation glass for preparing flash fiber panel and preparation method thereof |
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