Assessment of Correlation between Intravoxel Incoherent Motion Diffusion Weighted MR Imaging and Dynamic Contrast-Enhanced MR Imaging of Sacroiliitis with Ankylosing Spondylitis

Table 5

Correlations between IVIM and DCE-MRI parameters in sacroiliitis with AS.

Parameters	Ds				Df
		value		-value		value
ME (%)	0.700	<0.001	−0.007	0.965	−0.608	<0.001
RE (%)	0.607	<0.001	−0.093	0.553	−0.330	0.030
TTP (s)	0.557	<0.001	0.2130	0.165	−0.374	0.012
BE (s)	0.416	0.013	0.1535	0.378	−0.257	0.136

RE: relative enhancement; ME: maximum enhancement; TTP: time to peak; BE: brevity of enhancement; Ds: pure diffusion coefficient; : perfusion fraction; Df: pseudo-diffusion coefficient. Statistically significant (), Spearman’s rank correlation.