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Performance Evaluation of a Modular Gamma Camera Using a Detectability Index

¹ Optical Sciences Center, University of Arizona, Tucson, Arizona
² Department of Radiology and Optical Sciences Center, University of Arizona, Tucson, Arizona

View larger version (22K): [in a new window]   FIGURE 1. (A) Experimental setup for collecting signal data. (B) Experimental setup for collecting nonuniform random background data.

View larger version (62K): [in a new window]   FIGURE 2. (A) Sample signal image (D = 10 mm, Z = 5 cm). (B) Sample uniform background image with signal present. (C) Sample nonuniform random background image with signal present.

View larger version (19K): [in a new window]   FIGURE 3. Diagram of theoretical model for uniform background experiment.

View larger version (22K): [in a new window]   FIGURE 4. Detectability (D) vs. contrast (C) plots for uniform and nonuniform random background experiments (D = 10 mm, Z = 5 cm).

View larger version (30K): [in a new window]   FIGURE 5. (A) Contrast (C) vs. diameter (D) plot for uniform background experiments as function of detectability (d'). (B) Contrast (C) vs. diameter (D) plot for nonuniform random background experiments as function of detectability (d').

View larger version (41K): [in a new window]   FIGURE 6. (A) Contrast (C) vs. depth (Z) plot for uniform background experiments as function of detectability (d'). (B) Contrast (C) vs. depth (Z) plot for nonuniform random background experiments as function of detectability (d').

View larger version (23K): [in a new window]   FIGURE 7. Comparison of theoretical and experimental contrast-detail plots for uniform background experiment (d' = 2.0).