Hi could you please explain what "moderately intense increased tracer uptake at the l5-s1 level of the lumbar spine and l4-5 level and right hip joint?

Bone scan?: Did you have a bone scan done? Assuming that is the case, a chemical (tracer) is injected into the body and will "light up" anywhere there is increased bone activity (increased tracer uptake). Causes of intense increased uptake usually are seen with a fracture, some metastatic lesions, and infections of the bone. Moderate uptake can be seen in arthritic joints such as possibly your hip and back