DEAD PIXEL CORRECTION FOR DIGITAL PET RECONSTRUCTION

A PET detector array (8) comprising detector pixels acquires PET detection counts along lines of response (LORs). The counts are reconstructed to generate a reconstructed PET image (36, 46). The reconstructing is corrected for missing LORs which are missing due to dead detector pixels of the PET detector array. The correction may be by estimating counts along the missing LORs (60) by interpolatingcounts along LORs (66) neighboring the missing LORs. The interpolation may be iterative to handle contiguous groups of missing detector pixels. The correction may be by computing a sensitivity matrixhaving matrix elements corresponding to image elements (80, 82) of the reconstructed PET image. In this case, each matrix element is computed as a summation over all LORs intersecting the corresponding image element excepting the missing LORs. The computed sensitivity matrix is used in the reconstructing. 一种包括探测器像素的PET探测器阵列(8)采集沿着响应线(LOR)的PET探测计数。重建所述计数以生成重建的PET图像(36、46)。针对因所述PET探测器阵列的死探测器像素而丢失的丢失LOR来校正所述重建。所述校正借助于以下操作：通过