This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2018, Subject name: Radiology
[{'content': 'MUGA scan not useful in:- \nSelect and explain. \nA. Left ventricular ejection fractio, B. Regional wall motion, C. Regional wall perfusion, D. Stroke volume', 'role': 'user'}, {'content': 'Answer: C \nExplanation: MUGA - Multi-Gated Acquisition scan In this scan, Tc99-m labeled RBC area injected into the patient and gamma camera is focused on hea, then the emitted radio-active substances are assessed using the gamma camera. Useful for measuring Ventricular function of the hea, Ventricular ejection fraction, Stroke volume Ventricular wall motion.', 'role': 'assistant'}]