MR venography (MRV) of the cerebral veins is a non-invasive highly accurate method used for 3D evaluation of the cerebral veins and dural sinuses, hence, it helps in diagnosing venous abnormalities particularly dural sinus thrombosis and cerebral venous malformations e.g. vein of Galen malformation.
Cerebral MRV is usually done without injection of contrast material, therefore it is safe for infants, pregnant women and renal patients
Patients with mechanically/magnetically activated devices as cardiac pacemaker, cochlear implants.
Patients with metallic foreign body in the eye.
Pregnant women in the first trimester (benefits versus risk to be assessed).
Patients with ferromagnetic surgical clips or prosthesis
Your physician may request full MRI examination of the brain ± cerebral MRA to perform a full evaluation of your brain and the cerebral circulation.
Your physician may ask for MRV study with contrast
No preparation needed for the non-contrast study.
Patient should be food fasting 4-6 hours before the exam in case of contrast enhanced study only. Adequate hydration is needed and recent kidney function test should be available at the time of your examination.
In case of claustrophobic patients, the examination can be done in one of our open MRI machines or under anesthesia
No after care or precautions needed following non contrast enhanced study.
In case of contrast enhanced study drinking plenty of water is advised to help to wash out the injected IV contrast material out of your body except if you are on fluid balance for renal or cardiac condition you may consult your physician and in case of lactating mothers it is advised to escape lactation for 24 hours after the contrast injection