A system for the detection of deep vein thrombosis (DVT), a disease where blood clots form in the legs, has been developed by the student and his supervisors at UBC. The current project is aimed at determining an approach using pre-screening criteria to evaluate the system in a clinical setting without having to examine hundreds of patients to obtain reliable results, as a consequence of the low incidence of the disease. In addition, the proposed research aims to determine the usability of the system by a broad spectrum of users, to determine its adequacy as a screening system for DVT by users with varying degrees of experience.