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21 May 1999 Investigation of a band-pass filter using view-specific image sequences for edge enhancement in quantitative coronary angiography
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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.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Craig A. Morioka, Francois O. Bochud, Craig K. Abbey, Miguel P. Eckstein, and James Stuart Whiting "Investigation of a band-pass filter using view-specific image sequences for edge enhancement in quantitative coronary angiography", Proc. SPIE 3661, Medical Imaging 1999: Image Processing, (21 May 1999); https://doi.org/10.1117/12.348563
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