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Table 2 Dose constraints

From: Intensity modulated radiotherapy (IMRT) combined with concurrent but not adjuvant chemotherapy in primary nasopharyngeal cancer – a retrospective single center analysis

Dose constraints Max [Gy] Mean [Gy]
brainstem 60 (surface) 54
temporal lobe° 60  
spinal cord 45  
optical nerves 54  
chiasma 54  
eye 50 25
lens 10  
brachial plexus* 60  
larynx   40
parotid gland’   26
  1. *: in cases with involved nodes in the supraclavicular region, doses up to 66 Gy were tolerated in small regions, °: in case of T4 lesions, doses up to 66 Gy were tolerated in small regions, ‘: at least one parotid gland was restricted to a median dose of 26 Gy, Max : Maximum dose to the organ at risk, Mean : Mean dose to the organ at risk, Gy : Gray.