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': 'Test of choice for Reversible Myocardial Ischemia – \nSelect and explain. \nA. Thallium scan, B. MUGA scan, C. Resting ECHO, D. Coronary angiography', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Nuclear cardiac imaging using radiotracers like Thallium is the first line technique for evaluating reversible ischemia.\n\nIt is worth noting that among the given options thallium scan is the best answer because PET is not provided as the option.\nPET is the most accurate and gold standard for detection of reversible ischemia (hibernating myocardium).\nTests for detection of reversible ischemia (hibernating myocardium or myocardium viability) →\xa0PET (first choice), perfusion (thallium) scan (2" choice).', 'role': 'assistant'}]