1. Department of Radiology, University of Pittsburgh, Pittsburgh, PA 15213, USA
2. Department of Cardiothoracic Surgery, Division of Thoracic and Foregut Surgery, University of Pittsburgh, Pittsburgh, PA 15213, USA
3. Surgical Services Division, Thoracic Surgery, VA Pittsburgh Healthcare System, Pittsburgh, PA 15213, USA
4. Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA 15213, USA