title: Z intensity-weighted position self-respiratory gating method for free-breathing 3D cardiac CINE imaging.
abstract: A free-breathing 3D cine steady-state free precession (SSFP) technique was developed using the z intensity-weighted position (ZIP) which is the center of mass of a projection along the slice direction as a respiratory gating signal. The ZIP signal was continuously acquired using a slice encoded k-space center sampling in every TR. The performance of this gating method was compared with a method using the k-space center signal (KC) and with conventional 2D breath-hold cine SSFP in healthy subjects by measuring image quality and left ventricular function. The preliminary data obtained here demonstrated that the ZIP gating method provided superior respiratory motion artifact suppression when compared to the KC gating and provided left ventricular ejection fractions, and end-diastolic and end-systolic volumes similar to those obtained with the breath-hold 2D cine SSFP acquisition.
authors.affiliation: Department of Radiology, Weill Medical College of Cornell University, 416 East 55th Street, New York, NY 10022, USA. pas2018@med.cornell.edu
authors.forename: Pascal
authors.initials: P
authors.lastname: Spincemaille
authors.forename: Jing
authors.initials: J
authors.lastname: Liu
authors.forename: Thanh
authors.initials: T
authors.lastname: Nguyen
authors.forename: Martin R
authors.initials: MR
authors.lastname: Prince
authors.forename: Yi
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000328:Adult; D016477:Artifacts; D055424:Cardiac-Gated Imaging Techniques / Q000379:methods*; D006339:Heart Rate; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D019028:Magnetic Resonance Imaging, Cine / Q000379:methods*; D019047:Phantoms, Imaging; D055425:Respiratory-Gated Imaging Techniques / Q000379:methods*