Butler J, Shapiro MD, Jassal DS, Jassal D, Neilan TG, Neilan T, Nichols J, Ferencik M, Brady TJ, Hoffmann U, Cury RC. Comparison of multidetector computed tomography and two-dimensional transthoracic echocardiography for left ventricular assessment in patients with heart failure. Am J Cardiol. 2007 Jan 15; 99(2):247-9.