CN211826543U - Double-energy spectrum and double-resolution X-ray detector and detection system - Google Patents
Double-energy spectrum and double-resolution X-ray detector and detection system Download PDFInfo
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- CN211826543U CN211826543U CN202020192155.0U CN202020192155U CN211826543U CN 211826543 U CN211826543 U CN 211826543U CN 202020192155 U CN202020192155 U CN 202020192155U CN 211826543 U CN211826543 U CN 211826543U
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Abstract
The utility model discloses a dual-energy spectrum dual-resolution X-ray detector and a detection system, wherein the detector comprises a first visible light sensor, a first fluorescent material layer, an encapsulating material interlayer, a second fluorescent material layer and a second visible light sensor which are arranged in a stacking way, the first visible light sensor is closer to an X-ray source than the second visible light sensor, and the resolution of the first visible light sensor is greater than that of the second visible light sensor; the first visible light sensor absorbs the visible photons generated by the first fluorescent material layer excited by the X-rays; the second visible light sensor absorbs the visible photons generated by the second fluorescent material layer excited by the X-rays; the packaging material interlayer is used for separating the visible photons generated by the X-ray excitation of the first fluorescent material layer from the visible photons generated by the X-ray excitation of the second fluorescent material layer. The upper and lower detectors of the system can respectively output high-resolution images and high-energy absorption images, and interested images can be obtained through an image algorithm.
Description
Technical Field
The utility model relates to a X-ray detector imaging field especially relates to a X-ray detector and detecting system of two energy spectrum double resolution ratios.
Background
The detector in the X-ray imaging system plays a decisive role in the imaging of the system, in which it is desirable to realize the simultaneous presentation of X-rays of different energies, and in order to display tissues of different densities, it is desirable to have different resolutions, and the demands for dual energy and dual resolution in DSA-functional angiography in large C systems are becoming more and more clear.
The principle of using dual-energy imaging in the CT system at present is to use different energy sources to realize dual-energy imaging, but in the switching process, switching energy sources needs to take a certain time to switch, which affects the efficiency of the system, and there is a possibility that the object to be measured moves, forming a movement artifact.
In practical use, different resolutions are required, different tissues need to be resolved in different parts, and the detector needs to have higher resolution capability.
Such application scenarios put high demands on the system, and the detection capability of high and low energy spectrums and the high resolution are required, and such demands put the detection capability of dual energy spectrums and the different resolutions on the detector, so that the detection system in the prior art cannot well meet such high performance requirements.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems existing in the prior art, the utility model provides a double-energy spectrum and double-resolution X-ray detector and detection system, the upper and lower two-layer detector can output high resolution image and high energy absorption image respectively, can also obtain the image of interest through image algorithm. The technical scheme is as follows:
on one hand, the utility model provides a dual-energy spectrum dual-resolution X-ray detector, including the first visible light sensor, the first fluorescent material layer, the packaging material interlayer, the second fluorescent material layer and the second visible light sensor that stack up in order, the first visible light sensor is close to the X-ray source than the second visible light sensor, the resolution ratio of the first visible light sensor is greater than the second visible light sensor;
the first visible light sensor is used for absorbing the visible photons generated by the first fluorescent material layer excited by X-rays; the second visible light sensor is used for absorbing the visible photons generated by the second fluorescent material layer excited by the X-rays; the packaging material interlayer is used for isolating the visible photons generated by the X-ray excitation of the first fluorescent material layer from the visible photons generated by the X-ray excitation of the second fluorescent material layer.
Further, the thickness of the second fluorescent material layer is larger than that of the first fluorescent material layer.
Furthermore, the dual-energy spectrum and dual-resolution X-ray detector further comprises a packaging material wall layer arranged around the side surfaces of the first fluorescent material layer and the second fluorescent material layer, wherein one edge of the packaging material wall layer abuts against the first visible light sensor, and the other edge of the packaging material wall layer abuts against the second visible light sensor.
Further, the first visible light sensor and the second visible light sensor are the same in shape and size, the first fluorescent material layer and the second fluorescent material layer are the same in shape and size, the area of the first visible light sensor is larger than that of the first fluorescent material layer, and the packaging material wall layer is in a recessed structure relative to the first visible light sensor and the second visible light sensor.
Furthermore, the packaging material interlayer and the packaging material wall layer are both made of X-fluorescence packaging materials, and the packaging materials are aluminum films and hot melt adhesives.
Further, the X-ray-to-visible light material contained in the first and second fluorescent material layers is cesium iodide or other scintillators.
On the other hand, the utility model provides a dual-energy-spectrum dual-resolution's X-ray detection system, including X-ray source, first image acquisition device, second image acquisition device and as above dual-energy-spectrum dual-resolution's X-ray detector, first image acquisition device is connected in order to gather first image with first visible light sensor electricity, second image acquisition device is connected in order to gather the second image with second visible light sensor electricity.
Furthermore, the dual-energy-spectrum dual-resolution X-ray detection system further comprises a processor, the processor is electrically connected with the first image acquisition device and the second image acquisition device, and the processor can perform image operation processing on the first image acquired by the first image acquisition device and the second image acquired by the second image acquisition device.
The utility model provides a beneficial effect that technical scheme brought as follows:
a. utilizing the visible light sensors with different resolutions on the upper layer and the lower layer, and outputting a high-resolution image by the visible light sensor with high resolution;
b. the two layers of fluorescent material layers are isolated by using an encapsulation material, and X-rays passing through the one layer of fluorescent material layer and the two layers of fluorescent material layers form two different energy spectrums, wherein the X-rays passing through the second layer of fluorescent material layer are high-energy spectrums, and correspondingly high-energy absorption images are obtained;
c. by applying different image algorithms, an image of interest can be obtained, and an interested combined image is output after the resolution and the quantum detection efficiency are balanced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dual-spectrum dual-resolution X-ray detector provided by an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a dual-spectrum dual-resolution X-ray detection system according to an embodiment of the present invention.
Wherein the reference numerals include: 1-a first visible light sensor, 2-a second visible light sensor, 3-a first fluorescent material layer, 4-a second fluorescent material layer, 5-an encapsulation material interlayer and 6-an encapsulation material wall layer.
Detailed Description
In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.
The utility model provides a dual-energy spectrum dual-resolution's X-ray detector, see figure 1, it is including the first visible light sensor 1, first fluorescent material layer 3, packaging material interlayer 5, second fluorescent material layer 4 and the second visible light sensor 2 that stack up the setting in order, wherein, first visible light sensor 1 is the TFT flat board of two different resolutions with second visible light sensor 2, specifically, for example as shown in figure 1, first visible light sensor 1 is close to the X-ray source than second visible light sensor 2, then sets up first visible light sensor 1's resolution ratio is greater than second visible light sensor 2.
The first visible light sensor 1 is used for absorbing the visible photons generated by the first fluorescent material layer 3 excited by X-rays; the second visible light sensor 2 is used for absorbing the light photons generated by the second fluorescent material layer 4 excited by the X-rays.
As shown in fig. 1, the dual-spectrum and dual-resolution X-ray detector further includes a peripheral wall layer 6 of an encapsulation material disposed along the sides of the first fluorescent material layer 3 and the second fluorescent material layer 4, and one edge of the wall layer 6 of the encapsulation material abuts against the first visible light sensor 1, and the other edge abuts against the second visible light sensor 2. The packaging material partition layer 5 and the packaging material wall layer 6 are used together for isolating the visible photons generated by the X-ray excitation of the first fluorescent material layer 3 from the visible photons generated by the X-ray excitation of the second fluorescent material layer 4. In one embodiment of the present invention, the barrier layer 5 and the wall layer 6 are made of X-fluorescent packaging material, preferably aluminum film and hot melt adhesive.
In a preferred embodiment of the present invention, the thickness of the second fluorescent material layer 4 is greater than the thickness of the first fluorescent material layer 3. Optionally, the X-ray to visible light material contained in the first fluorescent material layer 3 and the second fluorescent material layer 4 is cesium iodide (CsI) or other scintillators, in the embodiment of the present invention, the X-ray to visible light material of the first fluorescent material layer 3 and the second fluorescent material layer 4 may be the same or different, and the other scintillators may be high-density Cherenkov crystal materials modified to be scintillation crystals, such as PbF2、NaBi(WO4)2And (3) an isocrystalline body; also NaI Tl or CsI Tl crystal, etc. The reason why the second fluorescent material layer 4 is thick is that the energy spectrum of the X-rays passing through the first fluorescent material layer 3 and entering the second fluorescent material layer 4 becomes narrow and the rays become hardened, that is, the intensity of the X-rays entering the second fluorescent material layer 4 becomes high, in order to ensure that the second fluorescent material layer 4 can absorb the X-rays with high intensity, if the number of the photons absorbed by the first visible light sensor 1 is close to or the same as the number of the photons absorbed by the second visible light sensor 2, the thickness of the second fluorescent material layer 4 is larger than that of the first fluorescent material layer 3, otherwise, most of the X-rays are absorbed in the first fluorescent material layer 3, and the absorption of the photons by the second visible light sensor 2 and the imaging quality of the underlying detector where the X-rays are located are affected.
Referring to fig. 1, the first visible light sensor 1 and the second visible light sensor 2 have the same shape and size, that is, a first image acquired by the first visible light sensor 1 and a second image acquired by the second visible light sensor 2 are two images obtained by imaging the same object, and the size and the angle of the imaged object in the two images are the same, so that it is possible to apply various image algorithms to the two images; the first fluorescent material layer 3 and the second fluorescent material layer 4 are identical in shape and size, the area of the first visible light sensor 1 is larger than that of the first fluorescent material layer 3, and the packaging material wall layer 6 is recessed relative to the first visible light sensor 1 and the second visible light sensor 2, so that visible photons generated by the first fluorescent material layer 3 excited by X-rays can be efficiently absorbed by the first visible light sensor 1, and visible photons generated by the second fluorescent material layer 4 excited by X-rays can be efficiently absorbed by the second visible light sensor 2.
In an embodiment of the present invention, a dual-spectrum dual-resolution X-ray detection system is provided, as shown in fig. 2, the X-ray detection system includes an X-ray source, a first image acquisition device, a second image acquisition device and a dual-spectrum dual-resolution X-ray detector as described above, the first image acquisition device is electrically connected to the first visible light sensor 1 to acquire a first image, and the second image acquisition device is electrically connected to the second visible light sensor 2 to acquire a second image. The X-ray detection system can output two forms of images by one-time exposure, the first fluorescent material layer 3 absorbs low-energy X-rays and converts the low-energy X-rays into visible photons which are absorbed by the first visible light sensor 1 with high resolution, and correspondingly, the first image acquisition device acquires high-resolution images, so that the high-resolution images have good imaging effect on low-density tissues and can acquire very clear images; the X-ray which is not absorbed by the first fluorescent material layer 3 penetrates into the second fluorescent material layer 4, the energy spectrum changes (narrows) to be hardened, the intensity of the ray is high, the ray is absorbed in the second fluorescent material layer 4 and converted into visible photons which are absorbed by the second visible light sensor 2 with low resolution, correspondingly, the second image acquisition device acquires a high-energy absorption image, and the high-energy X-ray imaging is suitable for imaging tissues with high density, such as mammary gland. It should be noted that the low resolution of the second visible light sensor 2 is relative to the high resolution of the first visible light sensor 1, and if the resolution of the second visible light sensor 2 is too high, the absorption of the visible photons by the second visible light sensor 2 is not favorable if the pixel size is too small, and therefore, the second visible light sensor 2 with too high resolution may not be able to image because the absorption efficiency of the visible photons is too low.
In a preferred embodiment, the dual-energy spectrum and dual-resolution X-ray detection system further includes a processor electrically connected to the first image acquisition device and the second image acquisition device, and the processor is capable of performing image operation on the first image acquired by the first image acquisition device and the second image acquired by the second image acquisition device. In this embodiment, the X-ray detection system can output three types of images at a time of exposure, and in addition to the above-described high resolution image and high energy absorption image, a combined image, which may be an image addition or subtraction or other more image processing operation on the first image and the second image, can be output.
The operation process of imaging by using the dual-energy spectrum and dual-resolution X-ray detection system in the embodiment of the utility model is as follows:
turning on the X-ray source to emit X-rays toward a first visible light sensor of the X-ray detection system;
if the target obtains a high-resolution image, outputting a first image X1 acquired by a first image acquisition device, for example, if the orthopedic patient is currently shot with an X-ray film, selecting to output a first image X1;
if the target obtains the high-energy absorption image, a second image X2 acquired by the second image acquisition device is output, for example, if the breast patient is currently taken an X-ray film, a second image X2 is selected to be output.
In addition, the processor may perform image operation on the first image x1 and the second image x2 to obtain a combined image f (x1) + f (x 2). For example, when a thicker tissue is imaged, but the density is lower, such as a hip joint, the first image and the second image need to be subtracted, and a composite image of interest can be output after balancing the resolution and quantum detection efficiency. The image algorithm f (x1) + f (x2) performed on the first image and the second image of the present invention can be any image synthesis algorithm in the prior art, and is not described herein again.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (8)
1. The double-energy-spectrum and double-resolution X-ray detector is characterized by comprising a first visible light sensor (1), a first fluorescent material layer (3), an encapsulating material interlayer (5), a second fluorescent material layer (4) and a second visible light sensor (2) which are sequentially stacked, wherein the first visible light sensor (1) is closer to an X-ray source than the second visible light sensor (2), and the resolution of the first visible light sensor (1) is greater than that of the second visible light sensor (2);
the first visible light sensor (1) is used for absorbing the visible photons generated by the X-ray excitation of the first fluorescent material layer (3); the second visible light sensor (2) is used for absorbing the visible photons generated by the second fluorescent material layer (4) excited by X-rays; the packaging material interlayer (5) is used for separating the visible photons generated by the X-ray excitation of the first fluorescent material layer (3) from the visible photons generated by the X-ray excitation of the second fluorescent material layer (4).
2. The dual-spectral dual-resolution X-ray detector according to claim 1, characterized in that the thickness of the second layer of phosphor material (4) is greater than the thickness of the first layer of phosphor material (3).
3. The dual-spectrum dual-resolution X-ray detector according to claim 1, further comprising a peripheral wall layer (6) of packaging material disposed along the sides of the first and second layers of phosphor materials (3, 4), wherein one edge of the wall layer (6) of packaging material abuts against the first visible light sensor (1) and the other edge abuts against the second visible light sensor (2).
4. The dual-spectral dual-resolution X-ray detector according to claim 3, wherein the first visible light sensor (1) and the second visible light sensor (2) are identical in shape and size, the first layer of phosphor material (3) and the second layer of phosphor material (4) are identical in shape and size, the first visible light sensor (1) has a larger area than the first layer of phosphor material (3) and the wall layer of encapsulant material (6) is in a recessed configuration with respect to the first visible light sensor (1) and the second visible light sensor (2).
5. The dual-spectral dual-resolution X-ray detector according to claim 4, wherein the barrier layer (5) of encapsulating material and the wall layer (6) of encapsulating material are both made of X-ray fluorescent encapsulating material, and the encapsulating material is an aluminum film and a hot melt adhesive.
6. The dual-spectral dual-resolution X-ray detector according to claim 1, wherein the first (3) and second (4) layers of phosphor material comprise an X-ray to visible material that is cesium iodide.
7. A dual-spectrum dual-resolution X-ray detection system comprising an X-ray source, a first image acquisition device electrically connected to a first visible light sensor (1) for acquiring a first image, a second image acquisition device electrically connected to a second visible light sensor (2) for acquiring a second image, and a dual-spectrum dual-resolution X-ray detector according to any one of claims 1 to 6.
8. The dual-spectrum dual-resolution X-ray detection system of claim 7, further comprising a processor electrically connected to the first image acquisition device and the second image acquisition device, wherein the processor is capable of performing image operation on the first image acquired by the first image acquisition device and the second image acquired by the second image acquisition device.
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| WO2021164281A1 (en) * | 2020-02-21 | 2021-08-26 | 江苏康众数字医疗科技股份有限公司 | Dual energy spectrum dual resolution x-ray probes, probe system, and imaging method |
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| WO2021164281A1 (en) * | 2020-02-21 | 2021-08-26 | 江苏康众数字医疗科技股份有限公司 | Dual energy spectrum dual resolution x-ray probes, probe system, and imaging method |
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