Nuclear Medicine — Bone Scan & PET Basics
Bone scan = radionuclide (Tc-99m MDP) uptake proportional to osteoblastic activity. Highly sensitive for metastasis, stress fractures, infection, AVN. PET (FDG-PET): measures metabolic activity (glucose uptake). PET superior for staging malignancy, differentiating benign vs malignant lesions. Limitations: false positives (arthritis, trauma, infection).
Related to
5Practised by MCQ
10What is the primary radionuclide used in bone scans for assessing osteoblastic activity?
mcqIn a three-phase bone scan, which phase is most indicative of acute osteomyelitis?
mcqWhat does a 'cold spot' on a bone scan indicate?
mcqWhich condition would most likely show a diffuse uptake in the delayed phase of a three-phase bone scan?
mcqWhich of the following is a limitation of PET imaging in orthopaedics?
mcqWhat is the half-life of Tc-99m, making it suitable for clinical imaging?
mcqWhich imaging modality is superior for staging malignancy in orthopaedics?
mcqWhat is the primary use of a labeled white cell scan (WBC scan) in orthopaedics?
mcqWhich of the following conditions would typically show multiple focal 'hot spots' on a bone scan?
mcqDuring which phase of a three-phase bone scan would you assess soft tissue perfusion?