What scenarios do you utilize CT venography in the workup of suspected DVT?

There are likely a limited number of scenarios in which a CT venogram should be ordered. My own approach is as follows:

1. Bilateral deep venous thrombosis: to exclude IVC obstruction. Anecdotally, in the younger patients, we have made a diagnosis of IVC atresia.
2. Suspected May-Thurner syndrome: typica...

I reserve the CT venogram for patients with a high suspicion of DVT.