An MRV uses magnetic resonance technology and intravenous (IV) contrast dye to visualize the veins. Contrast dye causes the blood vessels to appear opaque on the X-ray image, allowing the physician to visualize the blood vessels being evaluated.

Does MR Venogram require contrast?

Contrast Reaction

Regarding contrast reactions, a standard TOF MRV does not require contrast. And while contrast-enhanced MRVs may offer greater accuracy, patients with presumed IIH should undergo contrast enhanced MRI anyway, so there is no increased risk with the addition of contrast MRV.

Can MRV be done without contrast?

Therefore, non-contrast-enhanced MRV can be a useful tool in the diagnosis of venous diseases such as MTS in patients with renal insufficiency.