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Author Aura Hernandez-Sabate; Debora Gil; Josefina Mauri; Petia Radeva
Title Reducing cardiac motion in IVUS sequences Type Conference Article
Year 2006 Publication Proceeding of Computers in Cardiology Abbreviated Journal
Volume 33 Issue Pages 685-688
Abstract Cardiac vessel displacement is a main artifact in IVUS sequences. It hinders visualization of the main structures in an appropriate orientation and alignment and affects extracting vessel measurements. In this paper, we present a novel approach for image sequence alignment based on spectral analysis, which removes rigid dynamics, preserving at the same time the vessel geometry. First, we suppress the translation by taking, for each frame, the center of mass of the image as origin of coordinates. In polar coordinates with such point as origin, the rotation appears as a horizontal displacement. The translation induces a phase shift in the Fourier coefficients of two consecutive polar images. We estimate the phase by adjusting a regression plane to the phases of the principal frequencies. Experiments show that the presented strategy suppress cardiac motion regardless of the acquisition device. 1.
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Area Expedition Conference (up)
Notes IAM; MILAB Approved no
Call Number IAM @ iam @ HGM2006a Serial 1554
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