Multibolus stimulated echo imaging of coronary artery flow.
One limitation of traditional bolus tagging techniques for MR angiography is the small amount of blood labeled by one tagging, resulting in a limited filling of the downstream vessels. We describe a multiple bolus technique using stimulated echoes (STE) for imaging coronary flow. A series of radiofrequency (RF) pairs are given with each pair selective at the region of tagging, thus tagging consecutive volumes of blood, and a final nonselective pulse is given to "read out" all of the tagged spins. In this way, multiple boluses of tagged blood are imaged at one time.
Chao
H
H
Harvard-Massachusetts Institute of Technology, Division of Health Sciences and Technology, Cambridge, USA.
Burstein
D
D
D000818:Animals; D003326:Coronary Circulation / Q000502:physiology*; D003331:Coronary Vessels / Q000033:anatomy & histology*; D017352:Echo-Planar Imaging; D005240:Feasibility Studies; D007089:Image Enhancement / Q000379:methods*; D066298:In Vitro Techniques; D018810:Magnetic Resonance Angiography / Q000379:methods*; D019047:Phantoms, Imaging; D051381:Rats; D012680:Sensitivity and Specificity