Pilot Study of SGRT Alone vs. SGRT With Fiducials for Breath Hold SBRT tx of the Lung

This is a pilot study designed to to provide data and experience comparing two different techniques of breath hold SBRT treatments. The first technique will include SGRT, but with the assistance of implanted fiducials. Subjects will be treated with a breath hold technique utilizing SGRT, but will also be imaged during treatment with fiducial match. The second technique will utilize SGRT for breath hold treatments without the assistance of implanted fiducials/continuous imaging.