title: Cardiac-respiratory gating method for magnetic resonance imaging of the heart.
abstract: In studies of transmural myocardial function, acquisitions of high spatial and temporal resolution tagged cardiac images often exceed the practical time limit for breath-hold fast imaging techniques. Therefore, a dual cardiac-respiratory gating device has been constructed to acquire SPAMM-tagged cardiac MR images at or near end-expiration during spontaneous breathing, by providing an external trigger to a conventional MRI system. Combined cardiac and respiratory gating essentially eliminates the respiratory motion artifacts in tagged cardiac MR images. Compared to cardiac-gated images obtained during intermittent breath-holds, cardiac-respiratory gated images show improved tag-myocardium contrast due to magnetization recovery during inspiration.
authors.affiliation: Department of Bioengineering, University of Pennsylvania, Philadelphia 19104-6086, USA.
authors.forename: Q
authors.initials: Q
authors.lastname: Yuan
authors.forename: L
authors.initials: L
authors.lastname: Axel
authors.forename: E H
authors.initials: EH
authors.lastname: Hernandez
authors.forename: L
authors.initials: L
authors.lastname: Dougherty
authors.forename: J J
authors.initials: JJ
authors.lastname: Pilla
authors.forename: C H
authors.initials: CH
authors.lastname: Scott
authors.forename: V A
authors.initials: VA
authors.lastname: Ferrari
authors.forename: A S
authors.initials: AS
authors.lastname: Blom
mesh_terms: D000704:Analysis of Variance; D016477:Artifacts; D004562:Electrocardiography; D004867:Equipment Design; D006321:Heart / Q000033:anatomy & histology*; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000295:instrumentation / Q000379:methods* / Q000706:statistics & numerical data; D012119:Respiration; D012984:Software