TOMOGRAM RECONSTRUCTION METHOD AND TOMOGRAPH

摘要

A weight function is created according to an arbitrary bio-movement correction range set by a user and an inverse projection phase width (width in the view direction used for reconstruction) by considering the degree of the bio-movement and redundancy. By using this weight function, an image reconstruction is performed. The bio-movement correction range is set as a correction angle width indexɛexpressing the width guaranteed as a slope portion of the weight function. The inverse projection phase width (data width) is decided by considering the data redundancy, SN, time width (time resolution) contributing to the image. By deciding the weight according to these two parameters, it is possible to apply reconstruction of projection data of all the scan ranges in the reconstruction of the tomogram and prevent lowering of the data contribution ratio as well as reduce the bio-movement artifact, thereby obtaining a high-quality image.