2016_Head & Neck COURSE BOOK

Inner ear SNHL  ‐

RECOMMENDED DOSE– VOLUME LIMITS FROM  QUANTEC:  Because a threshold for  SNHL cannot be determined  from the present data, to  SNHL h d prevent  , t e ose to  the cochlea should be kept  as low as possible.  For conventionally  fractionated RT, the mean  dose to the cochlea should  be limited to <45 Gy

4 kHz

0.5‐2 kHz

All frequencies

Deasy (QUANTEC 2010) Int. J.  Radiation Oncology Biol. Phys