Numerical Methods For Research And Application Of Medical Ct Image Reconstruction Algorithm

Computerized Tomography (CT) is a typical non-invasive examination technique, which can depict anatomical structures without damaging the human body. It is based on the Radon Transform and inverted Radon Transform.The convolution back projection (CBP) technique and the algebraic reconstruction technique (ART) are two of the major image reconstruction methods in CT. The reconstruction speed of CBP is fast, and the quality of the reconstructed image is high. But, generally CBP needs complete projection data.Algebraic reconstruction to reconstruct CT images has advantages because of its simple arithmetic program and widely using. It may reconstruct images from all kinds of projections, which are got by various scan modes, and it is available to incomplete projection data too. But it usually takes a long running time. For solving this problem people put forward some methods recently.