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

Table 1 Clinical data of NPC patients undergoing radiotherapy

NO.	Age ranges (years)	Radiation dose (Gy)		Xerostomia degree
NO.	Age ranges (years)	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

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)

ISSN: 1471-2407