局所的非対称部位を有する頭部MR画像の対称軸検出法

概要

論文の詳細を見る
In this paper we propose a new technique for detecting a symmetrical axis in the human brain using two-dimensional MR images. Since MR brain images are non-invasive, they have been widely used in the diagnosis of brain diseases in medicine and the study of human brain functions. In such studies, there are many articles discussing the differences between the left and right hemispheres of the human brain. The purpose of detecting the symmetrical axis is to compare the differences between these two brain hemispheres. However, this symmetry is difficult to detect due to the development of lesions. Conventional methods of detecting the symmetrical axis cannot deal with these kinds of local asymmetry, resulting in false positives. Although prior research on the detection of the symmetrical axis or symmetrical plane of the human brain has been performed, most techniques are intricate, and thus unfavorable. In contrast, we have developed a novel method to find the symmetrical axis of the human brain with local asymmetry. Our method examines the center of gravity of each perpendicular line of the assumed symmetrical axis. If the assumed axis is correct, the center of gravity of each line correctly matches with the axis. On the basis of this idea, using the information derived from these lines, such as mean squared errors of the center of gravity, asymmetric parts are removed selectively by parameters we defined. Then we can determine the symmetrical axis irrespective to local asymmetry. Our method is applied to MR brain images and the results are reasonable regardless of the local asymmetry caused by lesions. We also considered the possible effects of the parameters we defined and conclude that our method is well suited for detecting the symmetrical axis in the human brain.
社団法人日本生体医工学会の論文
2003-12-10

局所的非対称部位を有する頭部MR画像の対称軸検出法

スポンサーリンク

概要

著者

関連論文

スポンサーリンク