Part I | Chapter 6 122 Supplementary A Centre CTV* PTV GTV A Treated patients: 248/425 CTV1: Prostate including GTV CTV2: Prostate including GTV + proximal 1 cm of SV CTV with 5 mm isotropic margin MRI-visible tumour(s) with 4 mm isotropic margin excluding OARs B Treated patients: 82/425 CTV1: Prostate including GTV CTV2: Prostate including GTV + proximal 2 cm of SV CTV with 5 mm isotropic margin MRI-visible tumour(s) with 4 mm isotropic margin excluding OARs C and D Treated patients: 59/425 CTV1: Prostate + proximal 1 cm of SV CTV2: Prostate + proximal 1-2 cm of SV CTV1 with 5 mm margin except posterior (3 mm) CTV2 with 5 mm isotropic margin No GTV contoured E Treated patients: 25/425 CTV1: Prostate including the GTV + 3 mm isotropic margin (for microscopic extracapsular extension), excluding OARs CTV2: whole prostate gland including the GTV + 3 mm isotropic margin (for microscopic extracapsular extension), excluding OARs + proximal 2 cm of SV CTV with 5 mm isotropic margin MRI-visible tumour(s) F Treated patients: 9/425 CTV1: Prostate + proximal 1 cm of SV CTV2: Prostate + proximal 1-2 cm of SV CTV1 with 5 mm margin except posterior (3 mm) CTV2 with 5 mm isotropic margin. No GTV contoured G Treated patients: 2/425 CTV: Prostate including intraprostatic SV CTV with 5 mm margin except posterior (3 mm) No GTV contoured Table S1 – Clinical Target Volume (CTV), Planning Target Volume (PTV), and Gross Tumour Volume (GTV) definitions for 5 x 7.25 Gy prostate MRI-guided radiotherapy per treatment centre. Legend: SV = Seminal vesicles. OARs = Organs-at-risk. NCCN = National Comprehensive Cancer Network. EAU = European Association of Urology.
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