title: Self-navigation under non-steady-state conditions: Cardiac and respiratory self-gating of inversion recovery snapshot FLASH acquisitions in mice.
abstract: An algorithm is presented to enable cardiac and respiratory self-gating in combination with Inversion Recovery Look-Locker read-outs.
  
  
  
  A radial inversion recovery snapshot FLASH sequence was adapted for retrospective cardiac T1measurements in mice. Cardiac and respiratory data were extracted from the k-space center of radial projections and an adapted method for retrospective cardiac synchronization is introduced. Electrocardiogram (ECG) data was acquired concurrently for validation of the proposed self-gating technique. T1maps generated by the proposed technique were compared with maps reconstructed with the ECG reference.
  
  
  
  Respiratory gating and cardiac trigger points could be obtained for the whole time course of the relaxation dynamic and correlate very well to the ECG signal. T1maps reconstructed with the self-gating technique are in very good agreement with maps reconstructed with the external reference.
  
  
  
  The proposed method extends "wireless" cardiac MRI to non-steady-state inversion recovery measurements. T1maps were generated with a quality comparable to ECG based reconstructions. As the method does not rely on an ECG trigger signal it provides easier animal handling. Magn Reson Med 76:1887-1894, 2016. © 2016 International Society for Magnetic Resonance in Medicine.
authors.affiliation: Lehrstuhl Für Experimentelle Physik 5, Julius-Maximilians-Universität Würzburg, Würzburg, Germany.
authors.forename: Patrick
authors.initials: P
authors.lastname: Winter
authors.affiliation: Lehrstuhl Für Experimentelle Physik 5, Julius-Maximilians-Universität Würzburg, Würzburg, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Kampf
authors.affiliation: Department of Neuroscience, Neuroimaging Research Centre, Ruhr-Universität, Bochum, Germany.
authors.forename: Xavier
authors.initials: X
authors.lastname: Helluy
authors.affiliation: Lehrstuhl Für Experimentelle Physik 5, Julius-Maximilians-Universität Würzburg, Würzburg, Germany.
authors.forename: Fabian T
authors.initials: FT
authors.lastname: Gutjahr
authors.affiliation: Lehrstuhl Für Experimentelle Physik 5, Julius-Maximilians-Universität Würzburg, Würzburg, Germany.
authors.forename: Cord B
authors.initials: CB
authors.lastname: Meyer
authors.affiliation: Universität Würzburg, Medizinische Klinik und Poliklinik I, Würzburg, Germany.
authors.forename: Wolfgang R
authors.initials: WR
authors.lastname: Bauer
authors.affiliation: Lehrstuhl Für Experimentelle Physik 5, Julius-Maximilians-Universität Würzburg, Würzburg, Germany.
authors.forename: Peter M
authors.initials: PM
authors.lastname: Jakob
authors.affiliation: Lehrstuhl Für Experimentelle Physik 5, Julius-Maximilians-Universität Würzburg, Würzburg, Germany.
authors.forename: Volker
authors.initials: V
authors.lastname: Herold
mesh_terms: D000465:Algorithms; D000818:Animals; D016477:Artifacts; D055424:Cardiac-Gated Imaging Techniques / Q000379:methods*; D005260:Female; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods; D019028:Magnetic Resonance Imaging, Cine / Q000379:methods*; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D009203:Myocardial Infarction / Q000000981:diagnostic imaging*; D015203:Reproducibility of Results; D055425:Respiratory-Gated Imaging Techniques / Q000379:methods*; D012680:Sensitivity and Specificity; D012815:Signal Processing, Computer-Assisted
keywords: Look-Locker; T1 mapping; cardiac; cine; non-steady-state; retrospective triggering; self-gating