Development of Temporal Subtraction Technique Based on Previous and Current Thoracic MDCT Image Sets

Abstract

A temporal subtraction image can be used for enhancing interval changes such as shapes of new lesions and the interval changes in existing abnormalities on medical images by removing most of normal structures. There is no technique for image registration based on 3-D thoracic MDCT images until now. In this paper, we propose a new registration method for detecting the temporal changes from MDCT images based on analyzing the vector flow. The new method was applied to 5 clinical cases of MDCT images and satisfactory experimental results are obtained. The registration accuracy was improved obtained experimental results by using vector flow.