title: Determination of left ventricular volume and mass with use of biphasic spin-echo MR imaging: comparison with cine MR.
abstract: In this study, the authors compared a new rapid spin-echo magnetic resonance (MR) imaging method, biphasic MR, with cine MR in the determination of left ventricular volume and mass in healthy volunteers. Biphasic spin-echo MR images covering the entire heart were obtained with use of the electrocardiogram R wave and the downslope of the T wave at both end diastole and end systole, respectively. Biphasic MR-determined values correlated well with small standard errors of the estimate (end-diastolic volume = 7.82 cm3, end-diastolic mass = 10.20 g, end-systolic mass = 10.08 g, ejection fraction = 2.62%) and were more reproducible. Cine MR-defined end-systolic volume was significantly larger (P less than .01) and ejection fraction was significantly smaller (P less than .005) than biphasic MR-determined values probably because of the uncertainty in isolating end systole with cine MR. Left ventricular volumes, mass, and ejection fraction are more accurately and reproducibly quantified in a more time-efficient manner with use of biphasic MR than with cine MR because of its significantly shorter image acquisition and reconstruction times.
authors: Department of Radiology, University of California Medical Center, San Francisco 94143.
authors: G R
authors: GR
authors: Caputo
authors: J
authors: J
authors: Suzuki
authors: C
authors: C
authors: Kondo
authors: H
authors: H
authors: Cho
authors: R A
authors: RA
authors: Quaife
authors: C B
authors: CB
authors: Higgins
authors: D L
authors: DL
authors: Parker
mesh_terms: D000328:Adult; D000368:Aged; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008875:Middle Aged; D013318:Stroke Volume; D016277:Ventricular Function, Left