BACKGROUND The decision to perform coronary revascularization procedures may hinge on assessment of myocardial perfusion reserve. Blood oxygen level-dependent (BOLD) MRI is a potential method to detect the effects of regional variations in myocardial blood flow during vasodilation. METHODS AND RESULTS We imaged dogs (n=13) on a 1.5-T whole-body MRI… (More)
Our proof of principle results show the feasibility of quantifying myocardial blood volume (MBV) with the intravascular contrast agent MS-325. For severe stenoses in a canine model, stenosis zone MBV was higher than remote MBV at rest, and lower than remote during vasodilation.
Creation of a VX2 tumor model has traditionally required a laparotomy and surgical implantation of tumor fragments. Open surgical procedures are invasive and require long procedure times and recovery that can result in post-operative morbidity and mortality. The purpose of this study is to report the results of a percutaneous ultrasound guided method for… (More)
OBJECTIVES To evaluate the impact of correcting myocardial signal saturation on the accuracy of absolute myocardial blood flow (MBF) measurements. MATERIALS AND METHODS We performed 15 dual bolus first-pass perfusion studies in 7 dogs during global coronary vasodilation and variable degrees of coronary artery stenosis. We compared microsphere MBF to MBF… (More)
We evaluated R1 curves, CNR and scar visualization and quantification in a dog model of myocardial infarction by CMR, using three different contrast agents: Gadopen-tate dimeglumine (Gd-DTPA, Magnevist), Gadobenate dimeglumine (Gd-BOPTA, MultiHance), and Gadofos-veset (Ablavar). Gd-DTPA showed better characteristics for myocardial scar visualization and… (More)