An x-ray computed tomography system, method, and computer product that
generates an x-ray beam with an x-ray generator and detects with an x-ray
detector at least one characteristic of the x-ray beam generated by the
x-ray generator, after the x-ray beam has passed through an object, the
system including a converting unit configured to obtain analog projection
data outputted by the x-ray detector and to convert the analog projection
data to digital projection data, and a processing unit configured to
obtain the digital projection data from the converting unit, to detect
overflow digital projection data that overflows a measuring range of the
computed tomography system, and to correct the overflow digital
projection data of the digital projection data by using a curve fitting
function.