Bone PET-CT (Positron Emission Tomography - Computed Tomography) using NaF-18 is a diagnostic imaging technique used to assess bone health and detect abnormalities such as fractures, infections, tumors, and metastases. NaF-18 is a radioactive tracer that binds to bone mineral, allowing PET-CT scans to highlight areas of increased bone activity or metabolism. This imaging modality is particularly useful in oncology for staging and monitoring skeletal metastases and in orthopedics for evaluating bone diseases and injuries.