Lead Sponsor

The University of Texas Health Science Center, Houston

Age

18 - No limit years

Sex

ALL

Healthy Volunteers

No

•1. Presenting signs and symptoms sufficiently suspicious for lower extremity DVT to warrant a formal radiology study in the opinion of the treating physician AND EITHER 2a. Moderate or high pre-test clinical probability of DVT (Wells Criteria) OR 2b. Low pre-test clinical probability of DVT with a positive D-dimer

•1. Documented lower extremity DVT within the past 60 days
•2. Anatomic abnormality that, in the judgment of the investigator, would preclude imaging of both femoral and popliteal veins on the affected leg (i.e. above-knee amputation or severe scarring from intravenous drug abuse in the inguinal area)
•3. Patient below the age of 18 years.