Figure 3: Schematic representation of the possible sites of origin of sDF in PI dimmer and PI brighter populations. The parameters that correlate with PI dimmer and PI brighter sDF are summarized in the figure. (a) Testis inhomogeneity and hypoechogenicity. (b) Epididymis inhomogeneous tail echo-texture. (c) Prostate inhomogeneity and macro-calcifications (arrows). (d) Prostate hyperaemia and high arterial peak systolic velocity. Representative CDUS images are shown.