This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nuclear medicine, Subject name: Radiology
[{'content': 'A 50-year-old patient with ischemic hea disease develops chest pain. ECG shows ST segment elevation and Q waves. Myocardial necrosis in this patient can be best demonstrated by: \nSelect and explain. \nA. Technetium 99 tetrofosmin, B. Sestambi scan, C. Technetium 99 Pyrophosphate, D. Thallium 201', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Myocardial infarct imaging: Tc99m pyrophosphate is used to localize the area of infarct in hea. Area of infarct On thallium scan (Perfusion image) Cold spot Pyrophosphate scan (Infarct image) Hot spot', 'role': 'assistant'}]