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
True about Coronary Calcium Scoring EXCEPT: 
Select and explain. 
A. 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
B: Requires administration of iodinated contrast
Answer: B: Requires administration of iodinated contrast 
Explanation: 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)