Table 4.

Correlation between changes in mean apparent diffusion coefficient (ADC_mean) values, mean R₂* (R₂*_mean) values and fluorine-18 fludeoxyglucose (¹⁸F-FDG-PET) positron emission tomography at the third week of radiation therapy

Parameters	Spearman correlation
	∆ADCmean	∆R2*mean
∆SUVmax	−0.064 (p = 0.801)	−0.053 (p = 0.845)
∆SUVmean	0.239 (p = 0.341)	0.097 (p = 0.720)
∆MTV	−0.160 (p = 0.526)	0.047 (p = 0.863)
∆TLG	−0.181 (p = 0.473)	0.118 (p = 0.664)
∆R2*mean	0.223 (p = 0.390)

MTV, metabolic tumour volume; SUV_max, maximum standardized uptake value; SUV_mean, mean standardized uptake value; TLG, total lesional glycolysis.