Article 7 organs at risk human 6 Humans 4 cancer radiotherapy 4 clinical article 4 intensity modulated radiation therapy 4 male 4 procedures 4 radiotherapy dosage 4 Radiotherapy Dosage 3 Radiotherapy, Intensity-Modulated 3 adult 3 adverse event 3 cancer patient 3 controlled study 3 dosimetry 3 radiation injury 3 radiation response 3 treatment planning 3 Head and Neck Neoplasms 2 Head and neck 2 Organs at Risk 2 Radiation Injuries 2 Radiotherapy Planning, Computer-Assisted 2 artificial intelligence 2 cancer control 2 comparative study 2 head and neck cancer 2 head and neck tumor 2