Abstract

A lenticular film system designed to suppress image degrading crossover during dual screen radiographic exposure is proposed and evaluated. The lenticular screen consists of two sheets of crossed cylindrical lenslets each with a frequency of 25 lenslets/mm. A numerical analysis via optical ray tracing compares the theoretical frequency response of the proposed system to that of a conventional radiographic film. It shows an enhancement in the response by a factor of two, for frequencies 1-4 c/mm. Experimental measurements made on simulations of the proposed system using Kodak film type, SO-241 confirm the predicted improvement in the mid-frequency range. The proposed lenticular system reduces the need to absorb crossover illumination with a tinted film base by imaging crossover illumination with lenslets molded into the film base. By using the crossover illumination as part of the image forming exposure, a reduced radiation dose is required to obtain comparable or improved image quality.

Library of Congress Subject Headings

Photography--Films; Radiography, Medical; Medical photography

Publication Date

9-27-1982

Document Type

Thesis

Department, Program, or Center

School of Photographic Arts and Sciences (CIAS)

Advisor

Francis, Ronald

Advisor/Committee Member

Garson, John

Advisor/Committee Member

Granger, Edward

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: TR283.B87 1982

Campus

RIT – Main Campus

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