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Radiation imaging system based on photoluminescence image plate with radiation memory function

A technology of radiation imaging and photoluminescence, which is applied in the field of radiation measurement, can solve problems such as the inability to detect weak radiation signals, and achieve the effect of improving the signal-to-noise ratio

Active Publication Date: 2011-02-09
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to solve the problem that the gamma camera system in the prior art cannot detect weak radiation signals

Method used

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  • Radiation imaging system based on photoluminescence image plate with radiation memory function
  • Radiation imaging system based on photoluminescence image plate with radiation memory function
  • Radiation imaging system based on photoluminescence image plate with radiation memory function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The radiation imaging system based on the photoluminescent image plate with radiation memory function provided by this embodiment, such as figure 1 As shown, it includes a light-shielding frame 5, a pinhole collimator 1, a position-sensitive light detection module 2, a control and image processing module 9, and the like. The pinhole collimator 1 is located at the front end of the shading frame 5, the position-sensitive photodetection module 2 is placed at the rear end of the shading frame 5 and its light detection surface is facing the pinhole collimator 1, and the control and image processing module 9 is connected to the pinhole collimator 1. The position-sensitive photodetection module 2 is connected, and the key is that an image plate 7 made of a photoluminescent material with radiation memory function is also placed between the pinhole collimator 1 and the position-sensitive photodetection module 2; An excitation light source 3 corresponding to the photoluminescent ...

Embodiment 2

[0043] Other technical solutions remain unchanged, and the difference from Embodiment 1 is:

[0044] The photodetector adopted in the present embodiment is a charge-coupled device (CCD) or CMOS 12, and a tapered optical fiber imaging bundle 10 is placed between the optical filter 8 and the CCD / CMOS 12, such as image 3 shown. Fluorescent signals excited by the image plate 7 are coupled to the surface of the CCD / CMOS 12 through the tapered optical fiber imaging bundle 10 and measured, while retaining position information and intensity information.

Embodiment 3

[0046] Other technical solutions remain unchanged, and the difference from Embodiment 1 is:

[0047] The photodetector adopted in the present embodiment is a charge-coupled device (CCD) or CMOS 12, and an imaging lens group 13 is placed between the optical filter 8 and the CCD / CMOS 12, and the photosensitivity of the CCD / CMOS 12 The chip is located on the image plane of the imaging lens group 13, such as Figure 4 shown. The fluorescent signal excited by the image plate 7 is imaged to the surface of the CCD / CMOS 12 through the conical imaging lens group 13 and measured, while retaining position information and intensity information.

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Abstract

The invention belongs to the field of a radiation measuring technique, in particular to a radiation imaging system based on a photoluminescence image plate with a radiation memory function, which comprises a masking frame body, a pinhole collimator, a position sensitive optical detection module and a control and image processing module, wherein the pinhole collimator is arranged at the front end of the masking frame body; the position sensitive optical detection module is arranged at the back end of the masking frame body, and the optical detection surface of the position sensitive optical detection module is over against to the pinhole collimator; the control and image processing module is connected with the position sensitive optical detection module; an image plate made of a photoluminescence material with the radiation memory function is arranged between the pinhole collimator and the position sensitive optical detection module; an excitation light source corresponding to the photoluminescence material is arranged at the back end of the masking frame body; and a shutter is arranged at the back end of the masking frame body. The radiation imaging system of the invention can measure X-rays or gamma rays with extremely low strength and can be widely used for measuring the radiation strength and the radiation distribution in low-radiation sites.

Description

technical field [0001] The invention belongs to the technical field of radiation measurement, and in particular relates to a radiation imaging system based on a photoluminescence image plate with radiation memory function. Background technique [0002] The nuclear medicine department of the hospital can diagnose various organ diseases such as cardiovascular and cerebrovascular diseases and tumors by analyzing the distribution images of radionuclides in human organs. Radiation imaging measurement systems for X-ray or gamma-ray source distribution measurements, usually called gamma cameras, were first developed in the field of nuclear medicine. [0003] So far, many medical device companies have developed gamma camera systems for human body X-ray or gamma ray distribution measurement. These gamma cameras mainly consist of a collimator, a scintillation crystal plate, and a position-sensitive photodetection device. [0004] The material of the collimator is generally a metal m...

Claims

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Application Information

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IPC IPC(8): G01T1/16G01N23/04
Inventor 马吉增骆志平王莹
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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