Dr. John Mayo is currently the Head of Imaging, Vancouver General Hospital and Professor of Radiology and Cardiology at the University of British Columbia. In this position he is part of a collaborative cardiothoracic imaging program involving radiologists, respirologists, thoracic surgeons, cardiac surgeons, cardiologists and medical physicists. Dr. Mayo's current research interests include; imaging investigations for the early detection of lung cancer, CT and MR cardiothoracic imaging and CT radiation dose issues. In the last 25 years this team has performed research regarding: high resolution CT scanning for interstitial lung disease, MR quantification of lung water, spiral CT for pulmonary embolism, computer simulated dose reduction techniques, micro-coil localization to guide thoracoscopic resection of sub centimeter pulmonary nodules and lung cancer screening. In conjunction with Drs. Stephen Lam BC Cancer Agency he has participated in a single centre lung cancer screening trial for the last 12 years and a multicentre lung cancer screening trial in the last 4 years.