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

I-Cheng CHANG  Chung-Lin HUANG  Chen-Chang LEIN  Liang-Chih WU  Shin-Hwa YEH  

IEICE TRANSACTIONS on Information and Systems   Vol.E77-D   No.11   pp.1262-1272
Publication Date: 1994/11/25
Online ISSN: 
Print ISSN: 0916-8532
Type of Manuscript: Special Section PAPER (Special Issue on Computer Vision)
motion estimation,  normal direction constraint,  expanding process,  motion vector field,  Left Ventricular (LV),  

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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) imges 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.