LEFT-VENTRICULAR MOTION ANALYSIS OF 4-D SPECT IMAGING USING NORMAL DIRECTION CONSTRAINT

Citation
Ic. Chang et al., LEFT-VENTRICULAR MOTION ANALYSIS OF 4-D SPECT IMAGING USING NORMAL DIRECTION CONSTRAINT, IEICE transactions on information and systems, E77D(11), 1994, pp. 1262-1272
Citations number
NO
Categorie Soggetti
Computer Science Information Systems
ISSN journal
09168532
Volume
E77D
Issue
11
Year of publication
1994
Pages
1262 - 1272
Database
ISI
SICI code
0916-8532(1994)E77D:11<1262:LMAO4S>2.0.ZU;2-3
Abstract
For medical imaging, non-rigid motion analysis of the heart deformabil ity is a nontrivial problem. This paper introduces a new method to ana lyze the gated SPECT (Single Photon Emission Computed Tomography) imag es for 3-D motion information of left ventricular. Our motion estimati on method is based on a new concept called ''normal direction constrai nt'' in that the normal of a surface patch of some deforming objects a t certain time instant is constant. This paper consists of the followi ng 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 fie ld. In the experiments, we will demonstrate the accuracy of our method in analyzing the 3-D motion field of deforming object.