Brain scans alone versus radiation plus scans for lung cancer

Small-cell lung cancer can spread to the brain, so doctors typically give patients preventive brain radiation (called PCI) to reduce this risk. This trial is testing whether regular brain MRI scans alone — without the radiation — might be just as effective at keeping the cancer from spreading to the brain, while potentially avoiding some of radiation's side effects like memory problems.

Brain radiation can help prevent cancer from spreading to the brain, but it can also cause cognitive side effects like memory loss and trouble concentrating. Researchers want to know if close monitoring with MRI scans could be a safer alternative that works just as well.