Analysis of Interval Changes on Mammograms for Computer Aided Diagnosis
Abstract
The goal of this research is to develop a novel technique for computerized analysis of temporal differences between the most recent and previous mammograms of the same view in order to evaluate the usefulness of using interval change to distinguish between normal structures, benign masses, and malignant masses in computer-aided diagnosis (CAD). During this year, we have developed a multistage regional registration technique that combines global and local alignment procedures for identifying masses on temporal pairs of mammograms. In the first stage, the breast images from the current and previous mammograms were globally aligned by maximizing a mutual information measure. In the second stage a fan-shape search region based on polar coordinates was estimated on the previous mammogram. In the third stage a search for the best match between the lesion template from the current mammogram and a structure on the previous mammogram was carried out within the fan-shape region. We found that in 85% of the cases the corresponding regions on the previous and current mammogram were correctly identified. This technique can be useful for identification of corresponding lesions on temporal pairs of mammograms.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1999
- Accession Number
- ADA381103
Entities
People
- Lubomir X. Hadjiiski
Organizations
- University of Michigan