A signal-to-noise ratio(SNR) analysis of a S-35 thiourea autoradiographic image enhancement process incorporating subproportional bleaches is performed, with emphasis on diagnostic medical Imagery. Quantifying SNR through a spatial frequency definition of DQE and NEQ, these metrics were compared between donor and receiver-composite stages. While improvements in radiometric speed and gamma were noted in the receiver-composite, these gains were more than offset in a SNR sense by correspondingly lower MTF and higher Wiener spectrum values. As a result the donor's DQF_max of .30 exceeded that of the receiver-composite's DQE_max by 50%. Similarly, ImCXA the donor's NEQ_max exceeded that of the receiver composite's by 350%. The donor's DQE and NEQ continued to exceed that of the receiver-composite even on an equi -exposure basis.

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Department, Program, or Center

School of Photographic Arts and Sciences (CIAS)


Carson, John

Advisor/Committee Member

Jakubowski, James


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 .W4 1984


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