Arterial spin labeling of nasopharyngeal carcinoma shows early therapy response

Insights into Imaging

Table 4 Differences in ASL-derived parameters between the SD and PR groups and residual and non-residual groups

Parameters	Group		p-value	Group		p-value
Parameters	SD (n = 19)	PR (n = 36)	p-value	Residual (n = 17)	No-residual (n = 38)	p-value
Pre-TBF	129.87 ± 18.35	155.59 ± 17.26	< 0.001	129.34 ± 19.67	154.47 ± 17.32	< 0.001
Post-TBF	79.36 ± 9.79	86.73 ± 11.73	0.017	79.19 ± 13.04	86.42 ± 10.25	0.054
ΔTBF	50.50 ± 18.43	68.86 ± 15.05	0.01	50.15 ± 20.24	68.05 ± 14.62	0.003
Atrophy rate%	17.66 ± 6.99	60.02 ± 12.09	< 0.001	29.59 ± 20.28	52.46 ± 20.87	0.001

Pre-TBF pre-treatment tumor blood flow; Post-TBF post-treatment tumor blood flow; ΔTBF changes in tumor blood flow; SD the stable disease group; PR the partial response group; TBF in units of mL·100 g⁻¹·min.⁻¹