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Novel gamma-photon high spatial resolution detection device

A technology of high spatial resolution and detection device, which is applied in the direction of measuring device, radiation measurement, X/γ/cosmic radiation measurement, etc., can solve the problem of reducing the photon receiving efficiency of the photoelectric conversion part, improving the photoelectric conversion element, and improving the spatial resolution. and other issues, to achieve the effect of reducing crosstalk, reducing coupling process, and reducing detector resolution

Pending Publication Date: 2018-04-20
合肥吾法自然智能科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, in this structure, in order to improve the spatial resolution, the area of ​​the SiPM as a photoelectric conversion unit must be significantly smaller than the area of ​​the PMT photocathode, which greatly increases the number of photoelectric conversion elements; on the other hand, the splicing between SiPMs must be free. seam, which greatly increases the difficulty of the process
In order to reduce the crosstalk between adjacent units, there are generally millimeter-scale gaps in the splicing between SiPM units, which reduces the photon receiving efficiency of the photoelectric conversion part.
The above factors make this structure unable to effectively improve the spatial resolution below the millimeter within a reasonable cost range

Method used

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Embodiment 1

[0034] like image 3 As shown, a novel gamma photon high spatial resolution detection device includes a collimator 1, a scintillator 4, a light guide layer 3, an X-axis fiber layer 2, and a Y-axis fiber layer 5 attached in sequence, and also includes multiple SiPM 6. One end of the X-axis fiber layer 2 and the Y-axis fiber layer 5 are respectively coupled to the light guide layer 3, and the other ends are respectively coupled to the line array SiPM 6 (not shown in the figure); another plurality of SiPM 6 are attached to the side of the scintillator 4 Provides a trigger signal for photon counting.

[0035] to combine Figure 4 Shown, the use principle of the present invention is:

[0036] After the γ photons enter the scintillator 4 from the collimator 1 (not shown), fluorescent photons are generated in the scintillator 4, and the X-axis fiber layer 2 and the Y-axis fiber layer 5 respectively couple the fluorescent photons to the X-axis line array SiPM 6 (as shown in the ho...

Embodiment 2

[0039] like Figure 5 As shown, a novel gamma photon detection device with high spatial resolution includes a collimator 1, an X-axis optical fiber layer 2, a first light-guiding layer 3, a scintillator 4, a second light-guiding layer 7, and a Y The axial fiber layer 5 also includes a plurality of SiPMs 6 . One end of the X-axis optical fiber layer 2 is coupled to the first optical guide layer 3, and the other end is coupled to the SiPM 6 (not shown in the figure) of the line array; one end of the Y-axis optical fiber layer 5 is respectively coupled to the second optical guide layer 7, The other end is coupled to a line array SiPM 6 (not shown in the figure); another plurality of SiPMs 6 are attached to the side of the scintillator 4 to provide a trigger signal for photon counting.

Embodiment 3

[0041] like Figure 6 As shown, a novel gamma photon high spatial resolution detection device includes a collimator 1, an X-axis fiber layer 2, a Y-axis fiber layer 5, a light guide layer 3 and a scintillator 4 attached in sequence, and also includes multiple SiPM 6. One end of the X-axis fiber layer 2 and the Y-axis fiber layer 5 are respectively coupled to the light guide layer 3, and the other ends are respectively coupled to the line array SiPM 6 (not shown in the figure); another plurality of SiPM 6 are attached to the side of the scintillator 4 Provides a trigger signal for photon counting.

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Abstract

The invention relates to the camera imaging field and especially relates to a gamma-photon detector. The detector comprises a plurality of SiPM, a scintillator and a two-dimensional optical fiber layer, wherein photoconductive layers are attached to two surfaces of the scintillator. The two-dimensional optical fiber layer comprises two or more optical fiber layers. Two dimensions of the optical fiber layers of the two-dimensional optical fiber layer are separated and are flatly laid on two surfaces of the scintillator. Or the two dimensions of the optical fiber layers are mutually attached toany one surface of the scintillator. One end of each of the two dimensions of the optical fiber layers is coupled to the photoconductive layers of the contacted scintillator, and the other end is coupled to the SiPM of a linear array. The other SiPM is attached to a side surface of the scintillator so as to provide a trigger signal of photon counting. The detector has advantages of increasing a spatial resolution of the gamma detector and reducing camera cost.

Description

technical field [0001] The invention relates to the field of camera imaging, in particular to a gamma photon detector. technical background [0002] Since the invention of the anger camera, it has been widely used in the field of medical imaging because it has a large field of view and can provide static or dynamic images of the observed object. Such structures are used extensively in common gamma cameras, single photon emission computed tomography (SPECT) and positron emission tomography (PET) devices. Its typical structure is as figure 1 As shown, it includes four parts: the first part, the incident γ photons enter the scintillator 3 through the collimator 4; the second part, the fluorescent photons are generated in the scintillator 3; the third part, the fluorescent photons are coupled to the scintillator through the photoconductive layer 2 Photomultiplier tube (PMT) 1; the fourth part reconstructs the image through the back center of gravity readout circuit. In this s...

Claims

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Application Information

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IPC IPC(8): G01T1/202G01T1/24
CPCG01T1/201G01T1/202G01T1/248
Inventor 沈激刘伟鹏华仁军
Owner 合肥吾法自然智能科技有限公司
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