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Proceedings Paper

A Photo-Diode Array Angiographic System For Imaging And Blood Flow Measurements
Author(s): I A Cunningham; B B Hobbs; A Fenster
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Paper Abstract

A new x-ray imaging system is being developed for angiographic imaging and blood flow measurments. The system makes use of an x-ray image intensifier optically coupled to a multi-element solid-state photo-detector (Reticon diode array RL1024S). We describe the design of the system and its use in two modes of operation. The first mode is used to produce low noise images by imaging only small regions of interest at a time, thereby reducing noise from the detection of scattered radiation, and by making use of the very large dynamic range (8000:1) of the solid-state detector. The second mode of operation is used to obtain information on the flow of an injected bolus of contrast material through a region of interest. This is accomplished by determining the mean concentration of dye in each 0.33 mm section along the length of an arterial phantom as a function of time over a period of several seconds while the bolus passes through. This data is used to determine areas of flow separation and turbulence due to the presence of simulated stenoses ranging in size from 10% to 84% cross-sectional area reduction. Information on the flow conditions through an artery may be useful for chararterising stenoses or for investigating the conditions associated with the development of atherosclerotic disease.

Paper Details

Date Published: 15 June 1984
PDF: 8 pages
Proc. SPIE 0454, Application of Optical Instrumentation in Medicine XII, (15 June 1984); doi: 10.1117/12.939340
Show Author Affiliations
I A Cunningham, University of Toronto (Canada)
B B Hobbs, University of Toronto (Canada)
A Fenster, University of Toronto (Canada)

Published in SPIE Proceedings Vol. 0454:
Application of Optical Instrumentation in Medicine XII
Samuel J. Dwyer; Roger H. Schneider, Editor(s)

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