fig1

Figure 1. Example of an SBRT plan (40 Gy in 5 fractions) for a single hepatic metastasis in a patient with a castration-resistant prostate primary who had progressed after abiraterone. Axial image; red line showing gross tumour volume, peach line showing planning target volume, orange colourwash showing the 95% isodose line, and blue colourwash showing the 50% isodose line (A) coronal image; showing the 50% isodose line away from the heart (B) dose-volume histogram of the SBRT plan (C) dramatic PSA response following SBRT treatment (D). SBRT: stereotactic body radiotherapy