Compton Camera X-Ray Fluorescence Imaging Design and Image Reconstruction Algorithm Optimization.

According to Figure 15 , when image reconstruction is performed using the optimized algorithm, the Contrast-to-Noise Ratio (CNR) and Signal-to-Noise Ratio (SNR) values exhibit an increasing trend with the rise in concentration across different numbers of iterations.

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As indicated in Figure 14 , when image reconstruction is performed using the traditional LM-MLEM algorithm, the overall CNR and SNR values increase with the rise in concentration under the same number of iterations; however, both values exhibit a decreasing trend when the concentration reaches 1.6%.

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