Share Email Print
cover

Proceedings Paper

Simultaneous acquisition of storage phosphor and asymmetric screen-film chest images using a hybrid cassette
Author(s): Brent K. Stewart; Carolyn Kimme-Smith; Sandra L. Johnson; Timothy Johnson; Denise R. Aberle
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

A hybrid cassette has been developed for simultaneous acquisition of storage phosphor and asymmetric screen-film chest images. This is important for the collection of images for Receiver Operating Characteristic studies comparing conventional radiography and computed radiography, without either increased exposure or non-identical imaging conditions. This hybrid radiographic cassette consists of a computed radiography imaging plate (in front) and an intact, high contrast variant of a commercially available asymmetric screen-film system (in the rear) with a speed of approximately 425. The high contrast, speed and efficiency of this screen-film system allow for positioning of the storage phosphor plate in the front of the cassette. As the imaging plate absorption is approximately 35%, the fast screen-film system provides high quality diagnostic images. There is minimal beam hardening, which is ameliorated by the high contrast of the asymmetric front screen. There is minimal differences in the Plexiglas step wedge phantom gray level values for CR and CR-hybrid images and in optical density values for InSightTM and InSightTM-hybrid films. The signal to noise ratio of either hybrid image, while fractionally less than their standard counterparts, is negligibly so. Only a slight modification in radiographic technique is required (10%) for use of this hybrid cassette, providing images that are virtually the same as those obtained through the standard CR and InSightTM ITC imaging methods.

Paper Details

Date Published: 1 May 1994
PDF: 8 pages
Proc. SPIE 2163, Medical Imaging 1994: Physics of Medical Imaging, (1 May 1994); doi: 10.1117/12.174287
Show Author Affiliations
Brent K. Stewart, Univ. of Washington School of Medicine (United States)
Carolyn Kimme-Smith, UCLA School of Medicine (United States)
Sandra L. Johnson, UCLA School of Medicine (United States)
Timothy Johnson, UCLA School of Medicine (United States)
Denise R. Aberle, UCLA School of Medicine (United States)


Published in SPIE Proceedings Vol. 2163:
Medical Imaging 1994: Physics of Medical Imaging
Rodney Shaw, Editor(s)

© SPIE. Terms of Use
Back to Top