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Proceedings Paper

Toward Millisecond Scanning Beam Radiography
Author(s): S Rudin; D R Bednarek; R Wong; R Kaczmarek
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Paper Abstract

The rapid scanning beam Rotating Aperture Wheel (RAW) device is capable of achieving about 1,000 beam passes per second over each point in the field of view, allowing millisecond exposure times. Screen-film images of a chest phantom were obtained with exposure times of tens of milliseconds at scan speeds of a few hundred beam passes per second. These are the shortest exposure times ever achieved by a nongrid, purely scanning beam anti-scatter device. Because the scanning beam speed and exposure times were not synchronized for this study, well understood overlap artifacts appeared on the original radiograph. However, this artifactual density variation was subtracted, and the noise variation caused by the different quantum fluence in the alternating regions was imperceptible. A number of artifact correction methods are discussed. Finally, the application of various RAW device configurations to the millisecond exposure times used for cardiac cineradiography are outlined.

Paper Details

Date Published: 19 September 1985
PDF: 8 pages
Proc. SPIE 0555, Medical Imaging and Instrumentation '85, (19 September 1985); doi: 10.1117/12.949490
Show Author Affiliations
S Rudin, University at Buffalo (United States)
D R Bednarek, University at Buffalo (United States)
R Wong, University at Buffalo (United States)
R Kaczmarek, University at Buffalo (United States)

Published in SPIE Proceedings Vol. 0555:
Medical Imaging and Instrumentation '85
James A. Mulvaney, Editor(s)

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