As with CTV, MRV identifies stenosis, occlusion, venous atresia, collaterals, and edema. In addition, MRV can show webs, trabeculations, and vein wall thickening [9]. Furthermore, understanding unique patient anatomy could aid in the selection of appropriate treatment modality and reduction of recurrence and complication rates. In a study, a retrospective evaluation of a prospectively acquired database, out of 810 studied limbs, there were numerous anatomic variations, including 1 anatomic variant that had not been described in the literature [11]. Further highlighting the importance of MRV before intervention is the high rate of recurrence 2 years postintervention (15%-35%). Appropriate anatomic characterization before therapy can thus ensure appropriate and effective treatment [11-13]. MRV Abdomen and Pelvis MRV of the abdomen and pelvis has not been cited as a first-line examination. As with CTV, MRV identifies stenosis, occlusion, venous atresia, collaterals, and edema. In addition, MRV can show webs, trabeculations, and vein wall thickening [9]. Further highlighting the importance of MRV before intervention is a high rate of recurrence 2 years postintervention (15%-35%). Further anatomic characterization before therapy can ensure appropriate and effective treatment [10-13]. Characterization of these potential variants is important for treatment planning purposes. Lower Extremity Chronic Venous Disease There are 2 scenarios described in the literature characterizing pelvic venous obstruction. Primary chronic venous disease describes a phenomenon in which there is obstruction in the pelvic or abdominal veins (eg, May-Thurner) without a prior DVT. Imaging can then be used to identify the cause of obstruction. Secondary chronic venous disease describes a phenomenon in which primary thrombotic events cause a post-thrombotic syndrome.
Lower Extremity Chronic Venous Disease. As with CTV, MRV identifies stenosis, occlusion, venous atresia, collaterals, and edema. In addition, MRV can show webs, trabeculations, and vein wall thickening [9]. Furthermore, understanding unique patient anatomy could aid in the selection of appropriate treatment modality and reduction of recurrence and complication rates. In a study, a retrospective evaluation of a prospectively acquired database, out of 810 studied limbs, there were numerous anatomic variations, including 1 anatomic variant that had not been described in the literature [11]. Further highlighting the importance of MRV before intervention is the high rate of recurrence 2 years postintervention (15%-35%). Appropriate anatomic characterization before therapy can thus ensure appropriate and effective treatment [11-13]. MRV Abdomen and Pelvis MRV of the abdomen and pelvis has not been cited as a first-line examination. As with CTV, MRV identifies stenosis, occlusion, venous atresia, collaterals, and edema. In addition, MRV can show webs, trabeculations, and vein wall thickening [9]. Further highlighting the importance of MRV before intervention is a high rate of recurrence 2 years postintervention (15%-35%). Further anatomic characterization before therapy can ensure appropriate and effective treatment [10-13]. Characterization of these potential variants is important for treatment planning purposes. Lower Extremity Chronic Venous Disease There are 2 scenarios described in the literature characterizing pelvic venous obstruction. Primary chronic venous disease describes a phenomenon in which there is obstruction in the pelvic or abdominal veins (eg, May-Thurner) without a prior DVT. Imaging can then be used to identify the cause of obstruction. Secondary chronic venous disease describes a phenomenon in which primary thrombotic events cause a post-thrombotic syndrome.