This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
[{'content': 'Which of the following conditions cannot be detected by bone scintigraphy? \nSelect and explain. \nA. Avascular necrosis, B. Fractures, C. Osteomyelitis, D. None', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]