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Table 1 Dynamic changes of parotid MR parameters during radiotherapy

From: Early evaluation of radiation-induced parotid damage in patients with nasopharyngeal carcinoma by T2 mapping and mDIXON Quant imaging: initial findings

  pre-RT mid-RT post-RT
V (cm3) 27.2 ± 8.2 19.4 ± 5.5a 19.5 ± 5.7a
T2 (msec) 71.7 ± 5.2 76.0 ± 7.3a 79.4 ± 9.0a,b
FF (%) 38.2 ± 9.7 42.1 ± 10.3a 38.8 ± 13.5b
  1. Note: V volume, FF fat fraction, pre-RT within 2 weeks before radiotherapy, mid-RT 5 weeks after the beginning of radiotherapy, post-RT 4 weeks after radiotherapy. a P < 0.017 compared with pre-RT and b P < 0.017 compared with mid-RT using paired sample t test with Bonferroni correlation