Inclusion Criteria:

1.Lung tumor >= 5.0 cm.

2.Age > 18 years,

3.Histologic confirmation of malignancy (primary lung or metastatic tumor)

4.Deemed unresectable either by radiographic criteria (such as direct invasion of the
mediastinum, heart, great vessels, or trachea), by virtue of excessive risk to patient,
patient refusal to undergo surgery, or prior operative findings.

5.Performance status of 0-2 by Eastern Clinical Oncology Group criteria

Exclusion Criteria:1. No chemotherapy within 2 weeks of radiation treatment.

2. Refusal to sign informed consent.

3. Refusal to take a pregnancy test prior to treatment if the patient is a woman with
child bearing potential.