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Proceedings Paper

Investigation of a band-pass filter using view-specific image sequences for edge enhancement in quantitative coronary angiography
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Paper Abstract

Quantitative coronary angiography (QCA) diameter measurements are important in determining the extent of coronary artery disease progression and course of treatment in a patient. Traditional QCA techniques filter the X-ray angiographic image in order to enhance the edge profiles. We investigated a new method of obtaining an edge enhancement filter based on the power spectrum of an ensemble of view specific background images for X-ray angiographic images. The band-pass filter is obtained from the power spectra of a particular view imaged with (1) background only and (2) contrast filled arteries plus background. We tested our band-pass filter by measuring the diameters of a coronary artery phantom. The angiograms were filtered with a Sobel kernel to highlight the edges. The same angiograms were band-pass filtered and then Sobel filtered to see if our band-pass filter had any effect on the accuracy of the artery diameter measurement. The mean absolute percent error of the diameter measures decreased with the use of the band-pass filter 14.2% plus or minus 16.5% (n equals 57). Two- way analysis of variance was not statistically significant between the diameter measures (0.5 - 5.0 mm) of the Sobel only filtered image compared to the band-pass edge enhancement plus Sobel filtering.

Paper Details

Date Published: 21 May 1999
PDF: 5 pages
Proc. SPIE 3661, Medical Imaging 1999: Image Processing, (21 May 1999); doi: 10.1117/12.348563
Show Author Affiliations
Craig A. Morioka, Cedars-Sinai Medical Ctr. (United States)
Francois O. Bochud, Cedars-Sinai Medical Ctr. (United States)
Craig K. Abbey, Cedars-Sinai Medical Ctr. (United States)
Miguel P. Eckstein, Cedars-Sinai Medical Ctr. (United States)
James Stuart Whiting, Cedars-Sinai Medical Ctr. (United States)

Published in SPIE Proceedings Vol. 3661:
Medical Imaging 1999: Image Processing
Kenneth M. Hanson, Editor(s)

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