Single right coronary artery with a “malignant course” of the main coronary artery.

A 68-year-old patient with abdominal obesity, high cholesterol and family factors, and complaining of atypical chest pain was referred for CT of the coronary arteries to exclude significant stenosis. Cardiac CT was performed in prospective mode with injection of iodinated contrast and the following acquisition parameters: 100 kV, 600 mAs, 13.31 CTD/vol of mGy, DLP 189.56 mGy-cm and total effective dose 2.5 mSev.