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.

Inclusion Criteria Subject must meet all of the following applicable inclusion criteria to participate in this study: 1. Written informed consent with HIPAA authorization for release of personal health information. 2. Age ≥18 years at the time of consent. Because no dosing or adverse event data are currently available on the use of fiducials in combination with SBRT in subjects \