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Table 1 Clinical data of NPC patients undergoing radiotherapy

From: Early evaluation of irradiated parotid glands with intravoxel incoherent motion MR imaging: correlation with dynamic contrast-enhanced MR imaging

NO. Age ranges (years) Radiation dose (Gy) Xerostomia degree
R L Pre-RT Post-RT
1 51–60 28.5 27.5 0 1
2 61–70 25.6 26.9 0 2
3 41–50 26.0 25.9 0 1
4 41–50 25.8 25.0 0 2
5 51–60 25.5 25.9 0 1
6 21–30 32.6 34.3 0 1
7 51–60 30.4 33.2 0 2
8 61–70 30.3 29.9 0 1
9 61–70 27.7 28.8 0 1
10 41–50 28.1 28.1 0 1
11 51–60 31.0 29.7 0 2
12 51–60 30.8 31.5 0 2
13 41–50 29.0 28.8 0 2
14 41–50 27.6 27.0 0 1
15 51–60 29.9 30.9 0 2
16 41–50 25.3 24.8 0 2
17 41–50 25.8 26.7 0 2
18 41–50 28.9 27.9 0 1
  1. NPC nasopharyngeal carcinoma, pre-RT approximately 2 weeks before radiotherapy (RT), post-RT approximately 4 weeks after RT, R right parotid gland, L left parotid gland. Xerostomia degree was evaluated by the acute radiation morbidity scoring criteria proposed by the Radiation Therapy Oncology Group (RTOG)