Figure 3. Normal coronary artery anatomy at 64-row multidetector CT (MDCT). 64-row MDCT of a 62-year-old male patient with risk factors for coronary artery stenosis. No stenoses were found at MDCT coronary angiography. Left anterior (a) oblique view and (b) caudal view. LAD, left anterior descending coronary artery; D, diagonal branch of the LAD; IM, intermediate coronary artery branch; Cx, circumflex coronary artery; MO, obtuse marginal branch (of the Cx); DP, descending posterior branch (of the right coronary artery).