Focal salvage radiotherapy for recurrent prostate cancer 187 was > 17.7 Gy and in 2 (7%) cases the bladder D1cm 3 was > 12.0 Gy. Median CTV/PTV D95% stratified by tumour location is presented in Table 3. Figure 2 – Example of dose distribution (with 50%, 100%, 150% and 200% isodose-lines) in simulated MR-Linac plan (A) and clinically delivered FS-HDR-BT plan (B). Legend: GTV = Gross Tumour Volume. CTV = Clinical Target Volume. PTV = Planning Target Volume. 9
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