Table 4.

DW CMR parameters were compared between acute and non-acute DVT. Relative signal intensity was the ratio of thrombus SI to normal muscle SI. The units are 10⁻³ mm²/s for ADC. Sensitivity and specificity in identifying acute DVT from non-acute DVT were obtained using the cutoff given in table

	ICC	Acute vs. non-acute	P	Cutoff	Sensitivity, 95%CI	Specificity, 95%CI
rSI0	0.91	2.0 ± 1.3 vs. 1.0 ± 0.8	0.01	0.95	73% (40/55), 59%~ 83%	60% (18/30), 41%~ 77%
rSI800	0.89	3.1 ± 1.9 vs. 1.6 ± 1.3	0.02	1.55	75% (41/55), 61%~ 85%	63% (19/30), 44%~ 79%
ADC	0.89	0.56 ± 0.17 vs. 0.22 ± 0.12	<0.001	0.32	93% (51/55), 82%~ 98%	90% (27/30), 72%~ 97%

DVT deep venous thrombus, SI signal intensity, ICC intra-class correlation coefficient, CI confidence interval, rSI₀ relative signal intensity on b = 0, rSI₈₀₀ relative signal intensity on b = 800