Beginning 1 month after transplantation, then every 3 months for 1 year, and then every 6 months for 5 years, you will have CT scans, positron emission tomography (PET) or Gallium scans (a nuclear medicine test that uses a special camera to take pictures of special tissues), and a bone marrow biopsy/aspirate. These tests will be done to check the status of the disease.