Myocardial risk area and peak gray level measurement by contrast echocardiography: effect of microbubble size and concentration, injection rate, and coronary vasodilation.
Vandenberg BF, Feinstein SB, Kieso RA, Hunt M, Kerber RE. Myocardial risk area and peak gray level measurement by contrast echocardiography: effect of microbubble size and concentration, injection rate, and coronary vasodilation. Am Heart J. 1988 Apr; 115(4):733-9.