1. an acoustic spatial locator (Model GP 8-3D, Science Accessories Corporation;Briefly,2000
2. Correspondence of left ventricular ejection fraction determinations from two-dimensional echocardiography, radionuclide angiography, and contrast cineangiography;Naik, M.M.; Diamond, G.A.; Pai, T.; Soffer, A.; Siegel, R.J.;J Am Coil Cardiol,1995
3. Determination of left ventricular volume in children: echocardiographic and angiographic comparisons;Silverman, N.H.; Ports, T.A.; Snider, A.R.; Schiller, N.B.; Carlsson, E.; Heilbaum, D.C.;Circulation,1980
4. Two-dimensional echocardiographic assessment of left ventricular volumes and ejection fraction in children;Mercier, J.C.; DiSssa, T.G.; Jarmakani, J.M.;Circulation,1982
5. Cross sectional echocardiograph. III. Analysis of mathematical models for quantifying volume of symmetric and asymmetric left ventricles;Wyatt, H.L.; Meerbaum, S.; Heng, M.K.; Gueret, P.; Hestness, J.; Cordey, E.;Am Heart J,1980