γ光闪烁体阵列的非均匀响应相对校正方法
Relative correction of photoresponse non-uniformity of γ-ray scintillator arrays
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摘要: 闪烁体阵列常用于辐射图像探测，基于闪烁体阵列存在严重的响应非均匀性，提出了相对校正方法，在无需知道光源参数、CCD相机参数及光学系统参数的前提下，利用本底图像、空场图像和被测样品辐射图像，得到被测物体对γ光的衰减分布。并进行了验证实验，结果表明：此方法不但可以消除响应的非均性的影响，而且可以消除辐射源固有分布的影响。Abstract: Scintillator arrays are used in radiation image detection generally. A relative correction method was proposed based on the severe photoresponse nonuniformity of scintillator arrays. The attenuation distribution of the detected object to γ-ray could be detected via background image, reference image and radiation image on the condition that the light source parameter，CCD camera parameter and optical system parameter were all unknown. The justification experiment was performed and the outcome showed that the influence of both the photoresponse non-uniformity and the inherent distribution of radiation source could be eliminated．
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Key words:
- scintillator arrays /
- relative correction /
- nonuniformity /
- ccd
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