title: Catheter-directed contrast-enhanced coronary MR angiography in swine using magnetization-prepared True-FISP.
abstract: Contrast-enhanced (CE) coronary magnetic resonance angiography (MRA) following intraarterial (IA) injection of contrast agent was compared using two sequences in swine: magnetization-prepared fast imaging with steady-state precession (True-FISP), and magnetization-prepared fast low-angle shot (FLASH). Thick-slice projection images were acquired with submillimeter in-plane spatial resolution (0.9 x 0.8 mm(2)). The magnetization-preparation scheme provided a clear delineation of the major coronary arteries with excellent background suppression. The True-FISP acquisition resulted in an increase in signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) by approximately a factor of 2 over FLASH (P < 0.05). Magnetization-prepared True-FISP is a promising technique for catheter-directed CE thick-slice projection coronary MRA.
authors.affiliation: Department of Radiology, Northwestern University, Chicago, Illinois, USA.
authors.forename: Jordin D
authors.initials: JD
authors.lastname: Green
authors.forename: Reed A
authors.initials: RA
authors.lastname: Omary
authors.forename: Brian E
authors.initials: BE
authors.lastname: Schirf
authors.forename: Richard
authors.initials: R
authors.lastname: Tang
authors.forename: Debiao
authors.initials: D
authors.lastname: Li
mesh_terms: D000818:Animals; D002404:Catheterization; D003287:Contrast Media / Q000008:administration & dosage*; D017023:Coronary Angiography; D003331:Coronary Vessels / Q000033:anatomy & histology*; D019786:Gadolinium DTPA / Q000008:administration & dosage; D007269:Injections, Intra-Arterial; D018810:Magnetic Resonance Angiography / Q000379:methods; D013552:Swine
chemical_list: D003287:Contrast Media; D019786:Gadolinium DTPA