Figure 5.

A 54-year-old man (a, b) and a 62-year-old man (c, d), both with a prostatic leiomyosarcoma. The images show the different diffusion appearances between the 2 cases. (a) DW image with a b value of 1000 s/mm² and (b) ADC map shows that the tumour demonstrates impeded diffusion and has a mean ADC value of 0.76 × 10^–3 mm²/s. (c) DW image with a b value of 1000 s/mm² and (d) ADC map shows that this tumour does not demonstrate impeded diffusion and has a mean ADC value of 0.51 × 10^–3 mm²/s but is also of low signal on the b1000 image.