Ct Venogram

Ct venogram shows bilateral superficial femoral solid arrows and deep femoral venous thrombosis open arrows.

Ct venogram. Venography is an x ray examination that uses an injection of contrast material to show how blood flows through your veins. Your doctor may use it to find blood clots identify a vein for use in a bypass procedure or dialysis access or to assess varicose veins before surgery. The specifics will vary depending on ct hardware and software radiologists and referrers preference institutional protocols. Ct venography ctv is not a.

Correct diagnosis of dvt is relatively difficult in this patient because the findings are bilateral but the veins are expanded and decreased in attenuation compared with what is normally expected. Ct pulmonary angiograms revealed pes not shown. In conclusion the proportion of patients with venous thromboembolism diagnosed only by a ct venogram is sufficiently high to merit. Cerebral venous thrombosis cvt refers to occlusion of venous channels in the cranial cavity including dural venous thrombosis cortical vein thrombosis and deep cerebral vein thrombosis.

By ana marija alduk md phd and gerard osullivan md. This article is intended to outline some general principles of protocol design. Sonogram not shown confirmed absence of dvt. The proportion of patients with venous thromboem bolism diagnosed only by a ct venogram was 25 of 231 108.

Findings of helical ct. Ap and lat head. The dye has to be injected constantly via a catheter making it an invasive procedure. A brief summary of how to perform indirect and direct ct venography and when this imaging modality can be helpful in diagnosing venous disease.

Name plane type window thick space scan range. Ct angiogram or the ct venogram showed venous thromboembolism in 231 of 1903 patients 121. Furthermore diagnostic imaging features can be subtle. Ct cerebral venography also known as a ctv head is a contrast enhanced examination with an acquisition delay providing an accurate detailed depiction of the cerebral venous system.

Ct venography rich hallett md section chief cv imaging northwest radiology network indianapolis adjunct clinical assistant professor stanford university cardiovascular imaging section. In this case sonography performed. Axial ct venogram acquired less than 2 min 30 sec after contrast medium injection shows heterogeneities in left external iliac vein arrow which may simulate deep venous thrombosis dvt. Scanning was repeated 1 min later not shown and revealed homogeneous enhancement.

Normally the catheter is inserted by the groin and moved to the appropriate site by navigating through the. Introduction ct venography ctv is a technique targeted to assess venous anatomy determine venous patency delineate collateral circulation non invasive simple protocols wide anatomic.