“…Specifically, convolution backprojection (CBP) algorithm of CT, which forms the backbone of any modernday medical and non-medical CT scanner, was targeted specifically for an exhaustive study during 1983-1998. The work carried out during this period [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15] laid the foundation of a comprehensive error analysis of CT images obtained from experimental data. The Kanpur Theorems play a vital role in this exercise.…”