CN104688255A - Optical detector, X-ray detection device, and computerized tomography device - Google Patents
Optical detector, X-ray detection device, and computerized tomography device Download PDFInfo
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- CN104688255A CN104688255A CN201310661115.0A CN201310661115A CN104688255A CN 104688255 A CN104688255 A CN 104688255A CN 201310661115 A CN201310661115 A CN 201310661115A CN 104688255 A CN104688255 A CN 104688255A
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Abstract
The invention provides an optical detector, an X-ray detection device, and a computerized tomography (CT) device. The optical detector comprises a first converting unit, a second converting unit, a frame, and a shielding member, wherein the first converting unit is configured to convert a first light, which is emitted to the first converting unit, into a second light; the second converting unit is configured to convert the second light, which is emitted from the first converting unit to the second converting unit, into an electric signal; the frame is configured to accommodate the first converting unit and the second converting unit; the shielding member is arranged between the first converting unit and the frame as well as between the second converting unit and the frame, and is configured to stop the first light, which penetrates the first converting unit and the second converting unit, from reaching the frame. Therefore, back scattering can be reduced or prevented, so that the quality of a scanned image can be improved.
Description
Technical field
The present invention relates generally to computerized tomography (CT) technical field, more particularly, relate to a kind of photo-detector, x-ray detection device and computerized tomography equipment.
Background technology
Computerized tomography (CT) equipment, by launching X-ray to destination object and converting the X-ray through destination object to the signal of telecommunication, obtains the scanogram of destination object.CT equipment generally includes the X-ray generator of generation X-ray and receives the x-ray detection device converting the signal of telecommunication through the X-ray comprised through destination object and by the X-ray of reception to.
X-ray detection device comprises photo-detector.Photo-detector comprises light-light conversion device X-ray being converted to visible ray and the electro-optic detector visible ray that light-light conversion device is changed being converted to the signal of telecommunication.In addition, photo-detector also comprises the framework holding light-light conversion device and electro-optic detector.
The X-ray inciding light-light conversion device can be called as front scattering (front scatter) X-ray.Front scattered x-ray is converted to visible ray by light-light conversion device, and such visible ray is converted to the signal of telecommunication by electro-optic detector, thus obtains scanogram.
But scattered x-ray before whole may not be converted to visible ray by light-light conversion device.Such as, incide the part possibility penetrating light-photoconverter in the X-ray (that is, front scattered x-ray) of light-light conversion device and propagate into framework, and therefore also may again be incided light-light conversion device by framework reflection.The X-ray being reflexed to light-light conversion device by framework is like this called as rear scattering (back scatter) X-ray.Because inciding the rear scattered x-ray of light-light conversion device and the visible ray making light-light conversion device produce also will be converted to the signal of telecommunication by electro-optic detector.Therefore, the image of sweeping obtained will comprise the signal of telecommunication produced because of rear scattered x-ray and the signal of telecommunication produced because of front scattered x-ray.Therefore, such signal of telecommunication produced because of rear scattered x-ray will cause the pseudomorphism in scanogram, thus make the quality deterioration of scanogram.
Therefore, a kind of photo-detector that can reduce or prevent rear scattering is needed.
Summary of the invention
The object of exemplary embodiment of the present invention is to overcome above-mentioned and/or other problem of the prior art.Therefore, exemplary embodiment of the present invention provides a kind of photo-detector, x-ray detection device and computerized tomography (CT) equipment that can reduce or prevent rear scattering.
According to exemplary embodiment, a kind of photo-detector comprises: the first converting unit, is constructed to the first light inciding the first converting unit to be converted to the second light; Second converting unit, is constructed to the second light inciding the second converting unit from the first converting unit to be converted to the signal of telecommunication; Framework, is constructed to accommodation first converting unit and the second converting unit; Shield member, is arranged on the first converting unit and between the second converting unit and framework, and is constructed to stop that the first light through the first converting unit and the second converting unit arrives framework.
According to another exemplary embodiment, a kind of x-ray detection device comprises and as above receive the X-ray as the first light and the X-ray of reception be converted to the photo-detector of the signal of telecommunication.
According to an exemplary embodiment again, a kind of computerized tomography equipment comprises: X-ray generator, produces X-ray; X-ray detection device, comprises photo-detector as above, and described photo-detector receives the X-ray produced by X-ray generator as the first light, and the X-ray of reception is converted to the signal of telecommunication.
By detailed description below, accompanying drawing and claim, other characteristic sum aspects can become clear.
Accompanying drawing explanation
Be described for exemplary embodiment of the present invention in conjunction with the drawings, the present invention may be better understood, in the accompanying drawings:
Fig. 1 is the diagram of the photo-detector illustrated according to exemplary embodiment;
Fig. 2 is the scattering curve figure that existing photo-detector is shown;
Fig. 3 and Fig. 4 illustrates the scattering curve figure according to exemplary embodiment;
Fig. 5 is the diagram that the scanogram that existing photo-detector obtains is shown;
Fig. 6 is the diagram that the scanogram obtained according to the photo-detector of exemplary embodiment is shown;
Fig. 7 is the diagram of the photo-detector illustrated according to another exemplary embodiment;
Fig. 8 illustrates the diagram according to the photo-detector of an exemplary embodiment again;
Fig. 9 is the diagram of the photo of the x-ray detection device illustrated according to exemplary embodiment;
Figure 10 illustrates the schematic diagram according to computerized tomography (CT) equipment according to exemplary embodiment.
Detailed description of the invention
Below will describe the specific embodiment of the present invention, and it is pointed out that in the specific descriptions process of these embodiments, in order to carry out brief and concise description, this description can not all do detailed description to all features of the embodiment of reality.Should be understandable that; in the actual implementation process of any one embodiment; as in the process of any one engineering project or design object; in order to realize the objectives of developer; in order to meet that system is correlated with or that business is relevant restriction; usually can make various concrete decision-making, and this also can change to another kind of embodiment from a kind of embodiment.In addition, it will also be appreciated that, although effort done in this development process may be complicated and tediously long, but for those of ordinary skill in the art relevant to content disclosed by the invention, some designs that the basis of the technology contents of disclosure exposure is carried out, manufacture or production etc. changes just conventional technological means, not should be understood to content of the present disclosure insufficient.
Unless otherwise defined, the technical term used in claims and description or scientific terminology should be in the technical field of the invention the ordinary meaning that the personage with general technical ability understands." first ", " second " that use in patent application specification of the present invention and claims and similar word do not represent any order, quantity or importance, and are only used to distinguish different ingredients.The similar word such as " one " or " one " does not represent that quantity limits, but represents to there is at least one." comprise " or the similar word such as " comprising " mean to appear at " comprising " or " comprising " before element or object contain the element or object and equivalent element thereof that appear at " comprising " or " comprising " presented hereinafter, do not get rid of other elements or object." connection " or " being connected " etc. similar word be not defined in physics or the connection of machinery, be also not limited to direct or indirectly connect.
Fig. 1 is the diagram of the photo-detector 100 illustrated according to exemplary embodiment.As shown in fig. 1, photo-detector 100 can comprise the first converting unit 110, second converting unit 130, framework 150 and shield member 170.
The the first smooth A inciding the first converting unit 110 can be converted to the second smooth B by the first converting unit 110.Here, the first light can be X-ray.Such as, the first light can be the X-ray produced by the X-ray producer (see figure 10) of computerized tomography (CT) equipment.Under these circumstances, the first converting unit 110 can be arranged in the light path on the x-ray spread institute edge that X-ray generation unit produces.In addition, in this example, photo-detector 100 can also comprise be arranged on x-ray spread institute edge light path on, to incide the first converting unit 110 at it before, it is collimated.First converting unit 110 can comprise the scintillator that the X-ray of incidence can be converted to the visible ray as the second smooth B.
Visible ray (that is, the second light) B produced by the first converting unit 110 can incide the second converting unit 130.For this reason, the second converting unit 130 can be arranged in the light path on the second smooth B propagation institute edge.Second smooth B can be converted to the signal of telecommunication by the second converting unit 130.Such as, the second converting unit 130 can be at least one in charge-coupled device (CCD) and complementary metal oxide semiconductors (CMOS) (CMOS) device.
Framework 130 can hold the first converting unit 110 and the second converting unit 130.Framework 130 can be printed circuit board (PCB) (PCB), such as, is provided with the PCB of semiconductor chip.
Shield member 170 can be arranged on the first converting unit 110 and between the second converting unit 130 and framework 150.Incide it first smooth A may not be all converted to the second smooth B by the first converting unit 110, and such as, as shown in fig. 1, a part of light A1 in the first smooth A may pass the first converting unit 110(and the second converting unit 130).Shield member 170 can be constructed to stop that the light A1 through the first converting unit and the second converting unit arrives framework.Such as, shield member 170 can be formed by least one in such as lead, the metal of tungsten and the compound of alloy and such as barium sulfate thereof.
In the embodiment show in figure 1, shield member 170 is formed the shape with plate.The shield member (hereinafter, being also referred to as conductively-closed plate) 170 of plate shape can be formed by monolayer or comprise the multiple layers overlie one another.When barricade 170 is formed by multiple layers, at least one deck in multiple layer can comprise at least one in such as lead, the metal of tungsten and the compound of alloy and such as barium sulfate thereof.
Because the voltage of the X-ray produced by the X-ray generator of CT equipment is different, so barricade 170 can have different thickness.The relation of the thickness of barricade 170 and the power of X-ray has been shown in table below, and wherein, the monolayer that barricade 170 is formed by lead is formed.
| Voltage (kV) | 75 | 100 | 150 | 200 | 250 | 300 | 350 | 400 |
| Thickness (mm) | ≥1 | ≥1.5 | ≥2.5 | ≥4 | ≥6 | ≥9 | ≥12 | ≥15 |
Therefore, according to exemplary embodiment, can stop that the first smooth A1 through the first converting unit 110 and the second converting unit 130 propagates into framework by barricade 170, therefore can prevent because framework reflects the rear scattering caused, and then can prevent from scanogram, producing pseudomorphism because of rear scattering, thus improve the picture quality of scanogram.
Fig. 2 is the scattering curve figure that existing photo-detector is shown, Fig. 3 is that the scattering curve figure according to exemplary embodiment is shown, Fig. 4 is the amplification diagram of a part for curve in Fig. 3.In Fig. 2 to Fig. 4, abscissa represents the numbering of photo-detector, and vertical coordinate represents the size (SPR, Scatter toPrimary Ratio) of scattering.
Can be found out with Fig. 3 and Fig. 4 by comparison diagram 2, the SPR being provided with the position of shield member reduces.
Fig. 5 is the diagram that the scanogram that existing photo-detector obtains is shown, Fig. 6 is the diagram that the scanogram obtained according to the photo-detector of exemplary embodiment is shown.
Can be found out with Fig. 6 by comparison diagram 5, compared with the scanogram obtained with the existing OPTICAL SENSORS not comprising shield member, the uniformity of the scanogram obtained according to the photo-detector comprising shield member of exemplary embodiment is more excellent.
Fig. 7 is the diagram of the photo-detector 700 illustrated according to another exemplary embodiment.Photo-detector 700 can comprise the first converting unit 710, second converting unit 730, framework 750, shield member 770 and collimator 790.Except shield member 770, the photo-detector 700 shown in Fig. 7 is identical with the photo-detector 100 shown in Fig. 1.Therefore, same or analogous element can be indicated with same or analogous Reference numeral, and for brevity, eliminate the detailed description to same or analogous element.
As shown in Figure 7, shield member 770 be formed in framework 750 towards on the surface of the first converting unit 710 and the second converting unit 730.Hereinafter, shield member 770 also can be called as screen layer 770.Similar to shield member 170, shield member 770 can be formed by least one in such as lead, the metal of tungsten and the compound of alloy and such as barium sulfate thereof.
In current exemplary embodiment, screen layer 770 can be formed by monolayer.Such as, by the metal towards such as plumbous, the tungsten of plating on the surface of the first converting unit 710 and the second converting unit 730 of framework 750 and alloy thereof or the compound applying such as barium sulfate, the screen layer 770 of monolayer can be formed.In addition, screen layer 770 can comprise the multiple layers overlie one another.At least one deck in multiple layer can comprise at least one in such as lead, the metal of tungsten and the compound of alloy and such as barium sulfate thereof.
Fig. 8 illustrates the diagram according to the photo-detector 800 of an exemplary embodiment again.Photo-detector 800 can comprise the first converting unit 810, second converting unit 830, framework 850, shield member (871,873) and collimator 890.Except shield member (871,873), the photo-detector 800 shown in Fig. 8 is identical with the photo-detector 700 shown in Fig. 7 with the photo-detector 100 shown in Fig. 1.Therefore, same or analogous element can be indicated with same or analogous Reference numeral, and for brevity, eliminate the detailed description to same or analogous element.
As shown in Figure 8, shield member (871,873) the first shield member (or barricade) 871 of being formed with the shape of plate can be comprised and be formed in framework 850 towards the secondary shielding component (or screen layer) 873 on the surface of the first converting unit 810 and the second converting unit 830.Here, the first shield member (or barricade) 871 can be identical with the screen layer 770 shown in Fig. 7 with the barricade 170 shown in Fig. 1 respectively with secondary shielding component (or screen layer) 873, therefore will omit the description of repeatability here.
Fig. 9 is the diagram illustrated according to the framework of exemplary embodiment and the photo of shield member.According to current exemplary embodiment, photo-detector can comprise the multiple shield members forming or arrange multiple different position.As shown in Figure 9, two shield members 970 can be formed on framework 950, to stop that the light through converting unit (not shown) arrives framework 950.
Figure 10 illustrates the schematic diagram according to computerized tomography (CT) equipment 1000 according to exemplary embodiment.
As shown in Figure 10, CT equipment 1000 can comprise X-ray generator 1100 and x-ray detection device 1300.X-ray generator 1100 can be installed on framework, and can produce X-ray.X-ray detection device 1300 can comprise photo-detector, such as, and photo-detector 100,700 and/or 800 as above.Photo-detector can receive the X-ray (such as, comprising the X-ray through destination object) produced by X-ray generator, and the X-ray of reception can be converted to the signal of telecommunication.Therefore, CT equipment 1000 can be reduced or be prevented the scanogram of the destination object of the impact of rear scattering.
According to exemplary embodiment, shield member can be set between converting unit and framework, thus can stop that the light through converting unit arrives framework, therefore can reduce or prevent rear scattering.Therefore, can reduce or prevent the pseudomorphism occurred in scanogram because rear scattering causes, thus improve the quality of scanogram.
Be described above some exemplary embodiments.It should be understood, however, that and can make various amendment.Such as, if if described technology is combined by different way with the assembly in the execution of different orders and/or described system, framework, equipment or circuit and/or is substituted by other assembly or its equivalent or supplement, then suitable result can be realized.Correspondingly, other embodiments also fall in the protection domain of claim.
Claims (12)
1. a photo-detector, comprising:
First converting unit, is constructed to the first light inciding the first converting unit to be converted to the second light;
Second converting unit, is constructed to the second light inciding the second converting unit from the first converting unit to be converted to the signal of telecommunication;
Framework, is constructed to accommodation first converting unit and the second converting unit;
Shield member, is arranged on the first converting unit and between the second converting unit and framework, and is constructed to stop that the first light through the first converting unit and the second converting unit arrives framework.
2. photo-detector as claimed in claim 1, wherein, the first only X-ray, the first converting unit comprises scintillator X-ray being converted to the visible ray as the second light.
3. photo-detector as claimed in claim 1, wherein, the second converting unit comprises at least one in charge-coupled image sensor and complementary mos device.
4. photo-detector as claimed in claim 1, wherein, framework comprises printed circuit board (PCB).
5. photo-detector as claimed in claim 1, wherein, shield member comprise be arranged on the first converting unit and the barricade between the second converting unit and framework and be formed in framework towards at least one in the screen layer on the surface of the first converting unit and the second converting unit.
6. photo-detector as claimed in claim 5, wherein, barricade comprises at least one in lead, tungsten and barium sulfate.
7. photo-detector as claimed in claim 5, wherein, barricade comprises the multiple layers overlie one another, and wherein, at least one deck in described multiple layer comprises at least one in lead, tungsten and barium sulfate.
8. photo-detector as claimed in claim 5, wherein, screen layer comprises at least one in lead, tungsten and barium sulfate.
9. photo-detector as claimed in claim 5, wherein, screen layer comprises the multiple layers overlie one another, and wherein, at least one deck in described multiple layer comprises at least one in lead, tungsten and barium sulfate.
10. photo-detector as claimed in claim 1, wherein, described photo-detector also comprises:
Collimator, is arranged on the first light and incides in the light path on the first converting unit institute edge.
11. 1 kinds of x-ray detection devices, comprising:
Photo-detector as claimed in claim 1, receives the X-ray as the first light and the X-ray of reception is converted to the signal of telecommunication.
12. 1 kinds of computerized tomography equipment, comprising:
X-ray generator, produces X-ray;
X-ray detection device, comprises photo-detector as claimed in claim 1, and described photo-detector receives the X-ray produced by X-ray generator as the first light, and the X-ray of reception is converted to the signal of telecommunication.
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| CN201310661115.0A CN104688255A (en) | 2013-12-09 | 2013-12-09 | Optical detector, X-ray detection device, and computerized tomography device |
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| CN201310661115.0A CN104688255A (en) | 2013-12-09 | 2013-12-09 | Optical detector, X-ray detection device, and computerized tomography device |
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| CN112617868A (en) * | 2019-10-07 | 2021-04-09 | 西门子医疗有限公司 | Image forming apparatus and image forming method |
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Application publication date: 20150610 |