volumetric modulated arc therapy human 6 intensity modulated radiation therapy 6 Article 5 Humans 5 Radiotherapy, Intensity-Modulated 5 clinical article 5 planning target volume 5 Radiotherapy Planning, Computer-Assisted 4 adult 4 controlled study 4 radiotherapy dosage 4 radiotherapy planning system 4 Radiotherapy 3 Radiotherapy Dosage 3 male 3 treatment planning 3 Patient treatment 2 Retrospective Studies 2 VMAT 2 Volumetric modulated arc therapy 2 algorithm 2 breast cancer 2 comparative study 2 dose volume histogram 2 dosimetry 2 image guided radiotherapy 2 image registration 2 prediction 2 prospective study 2