Salivary gland function in nasopharyngeal carcinoma before and late after intensity-modulated radiotherapy evaluated by dynamic diffusion-weighted MR imaging with gustatory stimulation

Table 2 The ADCs and ADCs changes of the salivary glands before and after RT

Parameters	PG	SMG	SLG	F	P
Tmax, pre, (s)	134.00 ± 243.56	310.00 ± 328.00	391.33 ± 368.48	5.145	0.008
Tmax, post, (s)	174.00 ± 240.83	194.00 ± 223.91	158.00 ± 222.69^a	0.186	0.831
ADCrest,pre(×10⁻³ mm²/s)	0.95 ± 0.08	1.09 ± 0.06	0.94 ± 0.07	40.365	0.000
ADCrest,post(×10⁻³ mm²/s)	1.11 ± 0.16^b	1.45 ± 0.14^c	1.25 ± 0.14^d	41.768	0.000
ADCstim, pre(×10⁻³ mm²/s)	1.04 ± 0.08	1.17 ± 0.09	1.20 ± 0.13	19.266	0.000
ADCstim,post(×10⁻³ mm²/s)	1.22 ± 0.18^e	1.58 ± 0.17^f	1.61 ± 0.22^g	38.572	0.000
ADCstim, pre IRs(%)	10.51 ± 6.44	7.35 ± 6.11	28.19 ± 16.61	35.121	0.000
ADCstim,post IRs(%)	10.17 ± 8.33	9.47 ± 9.79	29.15 ± 18.39	22.280	0.000
ADCrest, CRs(%)	17.21 ± 15.32	33.19 ± 13.28	32.94 ± 13.68	12.625	0.000
ADCstim, CRs (%)	17.20 ± 19.28	35.49 ± 14.10	34.22 ± 19.21	9.993	0.000

ADCrest,pre the rest ADCs pre-RT, ADCrest,post the rest ADCs post-RT, ADCstim,pre the stimulated ADCs pre-RT, ADCstim,post the stimulated ADCs post-RT, ADCstim,pre IRs the maximum stimulated ADCs IRs pre-RT, ADCstim,post IRs the maximum stimulated ADCs IRs post-RT, ADCrest,CRs the rest ADCs CRs before and after RT, ADCstim,CRs the stimulated maximum ADCs CRs before and after RT. PG parotid glands, SMG submandibular glands; SLG: sublingual glands
Pa = 0.004; Pb = 0.000; Pc = 0.000; Pd = 0.000; Pe = 0.000; Pf = 0.000; Pg = 0.000
Pa~g: the ADCs and ADCs changes of the salivary glands before and after RT had statistical significance

ISSN: 1472-6831