- Patients with brain metastases are eligible for entry into the study, but must have received definitive therapy consisting of external beam radiation therapy, gamma knife therapy or surgical resection and be clinically stable. Four weeks after the definitive therapy is completed, repeat MRI or CT scans must demonstrate stabilization of disease, and there must be no requirement for Decadron. If the patient does not have brain metastases, then only one brain CT or MRI is required prior to enrollment on study.