The study will involve patients undergoing sub-lobar resection, lobectomy, bilobectomy or pneumonectomy for lung cancer or metastatic lung disease at St. Joseph's Healthcare Hamilton, a regional tertiary thoracic surgery program with more than 350 major lung resections performed within the institution annually, as well as the University Health Network's Toronto General Hospital. The study will evaluate the incidence of post-operative venous thromboembolism (VTE) and will include 150 consecutively recruited patients. Study interventions will include Computed Tomography with pulmonary embolus (PE) protocol and bilateral extended leg Doppler Ultrasound for the detection of Deep Vein Thrombosis 30 days post-surgery.