FIG. 2.

The panels demonstrate the importance of attenuation correction. TRUS (a) without and (a) with attenuation correction. (b) and (f) median texture feature; (c) and (g) probability maps, where blue corresponds to pixels least likely prostate and red to pixels most likely prostate; (d) and (h) checkerboard images of aligned MRI and TRUS. In (d) and (h), light gray arrows show aligned regions and dark gray arrows show misaligned regions. Red ellipses in (b) and (f) show a region where attenuation correction increased the difference between prostate and background pixels. Black ellipses in (c) and (g) show the corresponding region on the probability maps.