title: Accelerated high-frame-rate mouse heart cine-MRI using compressed sensing reconstruction.
abstract: We introduce a new protocol to obtain very high-frame-rate cinematographic (Cine) MRI movies of the beating mouse heart within a reasonable measurement time. The method is based on a self-gated accelerated fast low-angle shot (FLASH) acquisition and compressed sensing reconstruction. Key to our approach is that we exploit the stochastic nature of the retrospective triggering acquisition scheme to produce an undersampled and random k-t space filling that allows for compressed sensing reconstruction and acceleration. As a standard, a self-gated FLASH sequence with a total acquisition time of 10 min was used to produce single-slice Cine movies of seven mouse hearts with 90 frames per cardiac cycle. Two times (2×) and three times (3×) k-t space undersampled Cine movies were produced from 2.5- and 1.5-min data acquisitions, respectively. The accelerated 90-frame Cine movies of mouse hearts were successfully reconstructed with a compressed sensing algorithm. The movies had high image quality and the undersampling artifacts were effectively removed. Left ventricular functional parameters, i.e. end-systolic and end-diastolic lumen surface areas and early-to-late filling rate ratio as a parameter to evaluate diastolic function, derived from the standard and accelerated Cine movies, were nearly identical.
authors.affiliation: Biomedical NMR, Department of Biomedical Engineering, Eindhoven University of Technology, Eindhoven, the Netherlands.
authors.forename: Abdallah G
authors.initials: AG
authors.lastname: Motaal
authors.forename: Bram F
authors.initials: BF
authors.lastname: Coolen
authors.forename: Desiree
authors.initials: D
authors.lastname: Abdurrachim
authors.forename: Rui M
authors.initials: RM
authors.lastname: Castro
authors.forename: Jeanine J
authors.initials: JJ
authors.lastname: Prompers
authors.forename: Luc M J
authors.initials: LM
authors.lastname: Florack
authors.forename: Klaas
authors.initials: K
authors.lastname: Nicolay
authors.forename: Gustav J
authors.initials: GJ
authors.lastname: Strijkers
mesh_terms: D000054:Acceleration; D000818:Animals; D006321:Heart / Q000502:physiology*; D006352:Heart Ventricles; D007091:Image Processing, Computer-Assisted; D019028:Magnetic Resonance Imaging, Cine / Q000379:methods*; D008810:Mice, Inbred C57BL
keywords: Cine MRI; compressed sensing; diastolic function; heart; mouse