John Ross

Abstract

A survey of radiographic films to establish the best donor/receiver combination for use in the autoradiographic image intensification technique was studied. Underexposed images of a 16 step aluminum wedge and a resolution target were made with Kodak film types XG-1, XL-5, XV-2, NMC or DuPont Cronex film. The underexposed, developed and processed films were treated in a subtractive photographic reducer (mixture of potassium ferricyanide and sodium thiosulfate) prior to radioactivation with an alkaline solution of sulfur-35 thiourea. Autoradiographs of the radioactivated films were made. Both qualitative and quantitative evaluations of the intensified images and their corresponding characteristic D-Log Rel. H curves indicate that Kodak films XG-1 and NMC formed the best donor and receiver combination. Statistical analyses of the quantitative results confirmed the choice of the XG-l/NMC combination as the best donor and receiver respectively. The use of sulfur-35 thiourea with high specific activity for activation of the underexposed image yielded disproportionate activation in the low and high density areas. Use of low specific activity sulfur-35 and potassium ferricyanide during the activation process seemed to indicate that linear activation of the underexposed step wedge can be achieved.

Library of Congress Subject Headings

Radiography; Photography--Films--Testing; Autoradiography

Publication Date

8-1-1980

Document Type

Thesis

Department, Program, or Center

School of Photographic Arts and Sciences (CIAS)

Advisor

Owunwanne, Azuwuike

Advisor/Committee Member

Carroll, Burt

Comments

Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works. Physical copy available through RIT's The Wallace Library at: TR750 .R67

Campus

RIT – Main Campus

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