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Proceedings Paper

Detectability of moving objects in fluoroscopy
Author(s): Ping Xue; Richard Aufrichtig; David L. Wilson
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Paper Abstract

We investigate the effect of motion on detectability of low-contrast objects using 2 fluoroscopic imaging techniques: 30 acq/sec (pulsed-30) and 15 acq/sec pulsed (pulsed-15). We measure detectability using a new reference/test, adaptive 9-alternative forced-choice method. For pulsed-30 (reference) and pulsed-15 (test), we measure absolute detectabilities, an equivalent perception dose (EPD) for test, and response times. Computer-generated phantoms are x-ray projections of cylinders that mimic arteries, catheters, and guide wires. In the case of the larger cylinders, motion increases absolute detectability. With the smaller cylinders, motion decreases detectability. Results from four subjects show that dose savings for pulsed- 15 is around 18% with relatively little effect of velocity or object size. In general, subjects take slightly longer to respond in the case of low acquisition fluoroscopy.

Paper Details

Date Published: 27 March 1996
PDF: 7 pages
Proc. SPIE 2712, Medical Imaging 1996: Image Perception, (27 March 1996); doi: 10.1117/12.236844
Show Author Affiliations
Ping Xue, Case Western Reserve Univ. (United States)
Richard Aufrichtig, Case Western Reserve Univ. (United States)
David L. Wilson, Case Western Reserve Univ. (United States)


Published in SPIE Proceedings Vol. 2712:
Medical Imaging 1996: Image Perception
Harold L. Kundel, Editor(s)

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