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Proceedings Paper

Clinical image-intensifier-based volume CT imager for angiography
Author(s): Ruola Ning; John B. Barsotti; Daniel K. Kido M.D.; Robert A. Kruger
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Paper Abstract

A digital angiographic system has been modified into a prototype of an image intensifier-based volume CT imager for angiography. The modified system has been tested by a vascular phantom. The system consists of two x-ray tubes and two image intensifiers that are separately mounted on a gantry. The two tube-detector sets can be rotated over 360 degree(s) in the gantry. To explore the imaging performance of the system for reconstructing a three-dimensional (3D) vascular structure a set of nonsubtraction projections of a vascular phantom, acquired over 36 projection angles, were digitized. These data were reconstructed using an iterative algorithm specially designed for 3D vascular structures. The quality of the reconstructed vascular images indicates that the system can offer adequate signal-to-noise ratio (SNR) for direct 3D vascular reconstruction when only a few projections are used without subtraction procedure, assuming intra-arterial injection of contrast. Also, a pincushion distortion correction algorithm has been developed and the results suggest that the algorithm works well for the image intensifier-based volume CT imager.

Paper Details

Date Published: 1 July 1991
PDF: 14 pages
Proc. SPIE 1443, Medical Imaging V: Image Physics, (1 July 1991); doi: 10.1117/12.43446
Show Author Affiliations
Ruola Ning, Univ. of Rochester Medical Ctr. (United States)
John B. Barsotti, Univ. of Rochester Medical Ctr. (United States)
Daniel K. Kido M.D., Univ. of Rochester Medical Ctr. (United States)
Robert A. Kruger, Innovative Imaging Sciences, Inc. (United States)

Published in SPIE Proceedings Vol. 1443:
Medical Imaging V: Image Physics
Roger H. Schneider, Editor(s)

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