Left Ventricular Motion Analysis of 4-D SPECT Imaging Using Normal Direction Constraint

概要

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For medical imaging, non-rigid motion analysis of the heart deformability is a nontrivial problem. This paper introduces a new method to analyze the gated SPECT (Single Photon Emission Computed Tomography) images for 3-D motion information of left ventricular. Our motion estimation method is based on a new concept called "normal direction constraint" in that the normal of a surface patch of some deforming objects at certain time instant is constant. This paper consists of the following processes: contour extraction, slices interpolation, normal vector field generation, expanding process, motion estimation for producing a 2-D motion vector field, and deprojection for a 3-D motion vector field. In the experiments, we will demonstrate the accuracy of our method in analyzing the 3-D motion field of deforming object.
社団法人電子情報通信学会の論文
1994-11-25