Catheter-directed contrast-enhanced coronary MR angiography in swine using magnetization-prepared True-FISP.
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.
Green
Jordin D
JD
Department of Radiology, Northwestern University, Chicago, Illinois, USA.
Omary
Reed A
RA
Schirf
Brian E
BE
Tang
Richard
R
Li
Debiao
D
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
D003287:Contrast Media; D019786:Gadolinium DTPA