Aged 1 Article 1 Avoidance-sector 1 Hip-prosthesis Humans 1 Metallic Implants 1 Pelvic Tumors 1 Pelvis 1 Radiotherapy 1 Radiotherapy Dosage 1 Radiotherapy Planning, Computer-Assisted 1 Radiotherapy, Image-Guided 1 Radiotherapy, Intensity-Modulated 1 VMAT 1 adult 1 aged 1 artifact reduction 1 clinical article 1 comparative study 1 dosimetry 1 human 1 image guided radiotherapy 1 intensity modulated radiation therapy 1 male 1 patient positioning 1 pelvis 1 planning target volume 1 radiotherapy dosage 1 radiotherapy planning system 1 volumetric modulated arc therapy 1