- Patients must have a computed tomography (CT) or magnetic resonance imaging (MRI) scan of the brain to evaluate for central nervous system (CNS) disease within 42 days prior to registration; patient must not have brain metastases unless: (1) metastases have been treated and have remained controlled for at least two weeks following treatment, AND (2) patient has no residual neurological dysfunction off corticosteroids for at least 1 day