A method for calculation of concentration index for line figure on curved surface and its application to stomach folds pattern analysis

摘要

This paper presents a method for evaluation of local concentration in a line figure on a curved surface and its application to analysis of stomach folds pattern in abdominal X-ray CT images. Because many stomach cancers have local concentration of folds to the cancer lesions. It is very important to evaluate such concentration in stomach diagnosis. In this paper, a method for calculation of Concentration Index for line figure on a curved surface is proposed first. This method consists of two steps; projection of line figure at each point on the curved surface and calculation of 2D then, a processing procedure automated detection of cancer regions from an abdominal X-ray CT image by using the above method is developed. In the experiment using practical X-ray CT images, it is shown that by the proposed procedure, values of Concentration Index are obtained at cancer area.