This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cardiovascular Radiology, Subject name: Radiology
[{'content': 'True about Coronary Calcium Scoring EXCEPT: \nSelect and explain. \nA. Done with the help of CT scan machine, B. Requires administration of iodinated contrast, C. Score >400 indicates very high risk of ischemic hea disease, D. Radiation dose ~1-2 mSv', 'role': 'user'}, {'content': 'Answer: B \nExplanation: CT Coronary Calcium Scoring Simplest application of cardiac CT Does not require administration of iodinated contrast. Presence of coronary aery calcification has been associated with increased burden of atherosclerosis and cardiovascular moality. Radiation dose associated is very low (~1-2 mSv). Coronary calcium is then quantified(Agatston score) Categorized as Minimal (0-10) Mild (10-100) Moderate (100-400) Severe (>400)', 'role': 'assistant'}]