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Figure 1 | EJNMMI Physics

Figure 1

From: Impact of injection dose, post-reconstruction filtering, and collimator choice on image quality of myocardial perfusion SPECT using cadmium-zinc telluride detectors in the rat

Figure 1

Examples of determination of regions of interest for calculation of contrast-to-noise ratio (upper) and sharpness index (lower). For contrast-to-noise ratio calculation, myocardial and background regions of interest (white) were drawn on a midventricular short-axis image. For sharpness index calculation, the maximal slope of epicardial border of lateral wall was determined from a line-profile curve on a midventricular short-axis image.

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