Effect of Prone Vs. Supine Positioning and Hydration on Lower Extremity Venography

Moazzem Kazi¹, Nanda Deepa Thimmappa¹, Neil Khilnani¹, Yi Wang¹, Martin R. Prince¹

Patients are normally imaged in the supine position and often dehydrated for MR venography of the lower extremity veins. The purpose of this study was to determine the effect of supine vs. prone positioning and hydration status on the common femoral vein luminal size. Our data indicates the importance of hydration for reducing underfilling of antedependent veins and repeating MR venography prone to distinguish physiologic underfilling from pathologic narrowing.