Peri-interventional 3D-irradiation plan. Contrast-enhanced planning computed tomography (CT) after CT-guided positioning of two afterloading catheters. Orange marker shows transcutaneous catheter 1, green marker shows transfemoral catheter 2. Visible tumour borders were defined as the clinical target volume (CTV) (blue line). Dose distribution was adjusted by 3D-treatment planning. The planned minimal enclosing dose was 15 Gy (blue line). Isodose irradiation lines surround the CTV