Share Email Print
cover

Proceedings Paper

Effects Of The CT Display Window On Detectability Of Large And Small Lesions
Author(s): Dana A. Twible; Philip F. Judy; Richard G. Swensson
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

The effects of CT display window width and lesion size on observer performance were studied by measurements of contrast-detail "thresholds" and lesion detectability (using ROC analysis). Both methods of measuring observers' perceptual performance showed that lesions became less visible as the width of the display window increased, and that the magnitude of this effect was greater for larger (lower contrast) lesions than for smaller ( higher contrast) lesions. Manipulations of the CT display window did not affect the information content of the physical image, as measured by actual calculations of signal-to-noise ratio for a "lesion-matched" filter. Therefore, the effects of display window on observer performance were attributed to psychophysical properties of the human visual system.

Paper Details

Date Published: 28 August 1984
PDF: 4 pages
Proc. SPIE 0486, Medical Imaging and Instrumentation '84, (28 August 1984); doi: 10.1117/12.943221
Show Author Affiliations
Dana A. Twible, Harvard Medical School and Brigham and Women's Hospital (United States)
Philip F. Judy, Harvard Medical School and Brigham and Women's Hospital (United States)
Richard G. Swensson, Harvard Medical School and Brigham and Women's Hospital (United States)


Published in SPIE Proceedings Vol. 0486:
Medical Imaging and Instrumentation '84
James A. Mulvaney, Editor(s)

© SPIE. Terms of Use
Back to Top