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Table 2 The incidences of SNHL and the inner ear mean radiation dose (IMRT)

From: Sensorineural hearing loss after concurrent chemoradiotherapy in nasopharyngeal cancer patients

Mean radiation doses Total
54 ears
SNHL at 4 Hz
(ears)
SNHL at PTA
(ears)
Cochlea mean dose    
≤ 50 Gy 24 6/24 (25%) 0/24 (0%)
> 50 Gy 30 14/30 (46.67%) 4/30 (13.3%)
Inner ear mean dose    
≤ 45 Gy 29 8/29 (27.59%) 0/29 (0%)
> 45 Gy 25 12/25 (48%) 4/25 (16%)
IAC mean dose    
≤ 50 Gy 31 8/31 (25.81%) 0/31 (0%)
> 50 Gy 23 12/23 (52.17%) 4/23 (17.4%)