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Proceedings Paper

Applying focal spot unsharpness to resolve ambiguity in 3D reconstruction from biplane coronary angiograms
Author(s): Cornelis H. Slump; Marc Schrijver; Corstiaan J. Storm
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Paper Abstract

In our research program that aims to quantify the functional relevance of partly occluded coronary vessels, we need in one of the approaches to the problem, the 3D structure of the pertinent vessels. The use of standard biplane projection angiograms is limited by the ambiguity about the orientation not resolved by the two projections. In this paper we study to solve the orientation ambiguity based upon the geometrical unsharpness due to the focal spot of the X-ray tube. We describe the influence of the focal spot on the imaging MTF. We present the analysis of the biplane projection geometry based upon fan beam and focal spot. We derive the analytical equation of the MTF due to focal spot and geometrical magnification. We also analyze and indicate practical situations of coronaries from real angiograms.

Paper Details

Date Published: 21 May 2001
PDF: 8 pages
Proc. SPIE 4321, Medical Imaging 2001: Physiology and Function from Multidimensional Images, (21 May 2001); doi: 10.1117/12.428170
Show Author Affiliations
Cornelis H. Slump, Univ. of Twente (Netherlands)
Marc Schrijver, Univ. of Twente (Netherlands)
Corstiaan J. Storm, Medisch Ctr. Rijnmond-Zuid (Netherlands)

Published in SPIE Proceedings Vol. 4321:
Medical Imaging 2001: Physiology and Function from Multidimensional Images
Chin-Tu Chen; Anne V. Clough, Editor(s)

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