RT Journal Article SR Electronic T1 Quantifying myocardial perfusion using contrast echocardiography JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 133 OP 135 DO 10.1136/hrt.2004.043760 VO 91 IS 2 A1 Galiuto, L YR 2005 UL http://heart.bmj.com/content/91/2/133.abstract AB There is a complex relation between what can be seen using perfusion imaging techniques, and what can be measured