Case 28. (a) Shear wave stiffness (SWS)-measured in the transverse section (SWS-T) measurement, region of interest (ROI) was a circle depicted with tunica albuginea as the boundary. (b) SWS measure in the longitudinal section (SWS-L) measurement, ROI was a circle depicted with tunica albuginea as the boundary. Diam, diameter; Max, maximum; Min, minimum; Q-Box™, measurement results of SWS; SD, standard deviation; SWE, ShearWave™ Elastography.