Table 3:

Morphology of recanalized segments on time-of-flight MR venography (TOF-MRV) and contrast-enhanced MR venography (CE-MRV)

TOF-MRV		CE-MRV
Recanalized Segment Morphology	N (%)	Recanalized Segment Morphology	N (%)
No flow signal	8 (25.8%)	Peripheral enhancement with central filling defect (PE)	15 (71.4%)
Peripheral continuous channels (PC)	12 (38.7%)	Irregular central and peripheral filling defects with heterogeneous enhancement (HE)	4 (19.1%)
Central and peripheral continuous channels (CPC)	6 (19.4%)	Central enhancing channel (CE)	2 (9.5%)
Irregular discontinuous channels (DC)	3 (9.7%)
Central continuous channel (CC)	2 (6.4%)

Note:—31 thrombosed segments were assessed by TOF-MRV, and 21 thrombosed segments were assessed by CE-MRV. All heterogeneously enhancing segments on CE-MRV exhibited corresponding central and peripheral channels on TOF-MRV. Thirteen of 15 thrombosed segments exhibiting peripheral enhancement with central filling defects on CE-MRV (PE) exhibited either no visible flow signal or corresponding peripheral channels on TOF-MRV.