TWO-DIMENSIONAL AND THREE-DIMENSIONAL CT SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a two-dimensional and three-dimensional CT(computerized tomography) system capable of performing fast processing at a low cost while maintaining the quality of a reconfiguration image. SOLUTION: This CT system is provided with a projection data acquiring means 1 for detecting the projection data while making a beam transmission state in a pixel area uniform even in any pixel of every layer and detects projected data by transmitting penetrating parallel beams such as X-rays to an observation target object S, a partial reconfiguration calculating means 2 which divides the entire area into small partial spaces and calculates the pixel value of a center pixel by previously preparing each coefficient value for each beam transmitting the partial spaces and performing product sum calculation of each beam projection value and each coefficient value, a partial reconfiguration coefficient preparing means 3 which calculates a reconfiguration coefficient value for each beam transmitting the partial spaces by using a means 10 by a sampling model and singular value decomposition or a means 11 by a partial reconfiguration influence function, and a displaying means 14.