Fig. 4

Axial three-dimensional gradient-echo magnetic resonance image before (a) and after (b) the application of the magnetization transfer prepulse. The magnetization transfer ratio (in percent) of the left paratesticular mass (arrowhead) was 44.6, similar to that of the contralateral normal testis (46 %, not shown on images). The left testis (arrow) was displaced and compressed and the measurement of the magnetization transfer ratio was impossible due to artifacts. Left hydrocele (long arrow)