Shogo Kawasaki, Toshiya Nakaguchi, Nobuyasu Ochiai, Norimichi Tsumura,
Yoichi Miyake
Graduate School of Sience and Technology,
Chiba University
1-33,Yayoi-cho, Inage, Chiba, 263-8522,
Medical Imaging Technology Vol.24 No.4, 262-269(2006).
Abstract
Orthopedic surgeons have been diagnosed the size and the shape of the humerus loss by using the difference of the CT images between the right and left humerus for a long time. However, this diagnostic method depends on the experience of physician. Therefore it is required to diagnose and evaluate the humerus loss quantitatively. In this paper, we propose a computer-aided quantitative diagnosis method of the humerus loss by comparing the three dimensional shape of the right and left humerus reconstructed from a Multi-sliced CT image under the assumption that the right and left humerus have mirror symmetry. An active contour model, histogram and discrimination analysis and a superimpose technique were introduced to compare the difference of 3-D images between the right and left humerus. As a result it was shown that the proposed diagnosis method is significantly useful for automatic extraction of the volume and the shape of the humerus loss.
Full paper(to appeare)
[PDF]( in Japanese )