Fig. 7
From: Post-treatment MRI aspects of photodynamic therapy for prostate cancer
Well-defined necrosis boundaries. A 72-year-old patient with a PSA level of 4.5 ng/ml treated for Gleason 6 (3 + 3) left lobe adenocarcinoma. Axial dynamic contrast-enhanced images before treatment (a) show a zone of post-biopsy haemorrhage on the right lobe without any suspicious enhancement. Day-7 post-treatment left MRI (b) shows no enhancement of the left treated lobe (necrosis). Note the extended periprostatic enhancement that surrounds the whole gland and indicates inflammation. Right lobe treatment for Gleason 6 adenocarcinoma: day-7 post-treatment axial (c) and sagittal (d) FS contrast-enhanced images show a large homogenous hypointense non-enhanced area in the treated lobe (necrosis) with well-defined and highly enhanced boundaries