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Proceedings Paper

Sensitivity Characteristics Of A Prototype Selenium Plate Detection System For Digital Radiographic Imaging
Author(s): Patrick J. Papin; Nicholas J. Mankovich; H. K. Huang
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Paper Abstract

We present an X ray measurement methodology with some preliminary X ray sensitivity characteristics for a prototype digital radiography system using amorphous selenium as the primary image receptor. As an imaging modality this experimental electrostatic system has the potential to replace film in existing general diagnostic radiography procedures. The imaging plate consists of a 360 micron layer of amorphous selenium deposited on an aluminumoxide substrate. An initial plate charge of 1400 volts (3.9 volts per micron) was exposed to X ray spectra produced with 50, 70, and 90 kVp with total filtration of 3 mm aluminum and 9 cm lucite. After this exposure the plate was scanned by a bank of electrometer probes at a distance of 100 microns. Sensitometric comparisons were then made to a conventional calcium-tungstate film-screen combination. The sensiometric response of the system is shown to be linear with an almost four fold increase in exposure latitude.

Paper Details

Date Published: 11 June 1985
PDF: 8 pages
Proc. SPIE 0535, Application of Optical Instrumentation in Medicine XIII, (11 June 1985); doi: 10.1117/12.947258
Show Author Affiliations
Patrick J. Papin, University of California (United States)
Nicholas J. Mankovich, University of California (United States)
H. K. Huang, University of California (United States)

Published in SPIE Proceedings Vol. 0535:
Application of Optical Instrumentation in Medicine XIII
Samuel J. Dwyer III; Roger H. Schneider, Editor(s)

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