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Vascular and Interventional Radiology |
1 From the Department of Radiology, Duke University Medical Center, Box 3808, MRI Section, Rm 1800, Durham, NC 27710. From the 1997 RSNA scientific assembly. Received June 13, 2000; revision requested July 24; revision received September 14; accepted September 19. Address correspondence to C.E.S. (e-mail: chuck.spritzer@duke.edu).
PURPOSE: To determine the relative frequency of deep venous thrombosis (DVT) isolated to the pelvic veins, as demonstrated with magnetic resonance (MR) imaging.
MATERIALS AND METHODS: The reports of 769 MR examinations performed from June 1993 through December 1999 in patients with suspected DVT were reviewed retrospectively. MR venography was performed by using a two-dimensional gradient-recalled-echo sequence (typically repetition time, 34 msec; echo time, 13 msec; flip angle, 60°). The presence of DVT was categorized by location in the pelvis, thigh, or calf.
RESULTS: DVT was identified in 167 (21.7%) of the 769 MR examinations. Thirty-four (20.4%) of the 167 studies demonstrated DVT isolated to the pelvic veins.
CONCLUSION: The relative frequency of isolated pelvic DVT detected with MR venography was higher than that reported in prior studies with ultrasonography (US) or ascending venography. MR venography should be performed in patients with suspected pelvic DVT or when clinical suspicion persists despite a negative US study.
Index terms: Magnetic resonance (MR), comparative studies, 98.12942, 98.1298 Magnetic resonance (MR), vascular studies, 98.12942 Veins, iliac, 98.751 Veins, thrombosis, 98.751 Veins, US, 98.1298 Venae cavae, thrombosis, 982.751 Venography, 98.12942
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