title: Effects of phase encode order and segment interpolation methods on the quality and accuracy of myocardial tags during assessment of left ventricular contraction.
abstract: Tissue tagging can be implemented during cardiovascular magnetic resonance imaging exams to assist with the quantification of left ventriculargeometry, volume and ejection fraction, endocardial thickening and relaxation, and myocardial stress-strain relationships. During tagged cine gradient echo image acquisitions of left ventricular wall motion, rows of k-space data can be acquired with various phase-encoding orders, and the reconstruction of supplemental images can be accomplished using a variety of interpolation techniques. In this study, we investigated the utility of various phase order and segment interpolation methods for determining accurate tag displacement trajectories. Center-out phase order image acquisition with reconstruction using linear interpolation provided the highest tag position and displacement accuracy. Therefore, it is recommended that myocardial tagging exams be acquired with center-out phase encode order and reconstructed using linear segment interpolation when used for performing quantitative analysis of cardiovascular structure and function.
authors.affiliation: Department of Medical Engineering, Wake Forest University School of Medicine, Winston-Salem, NC 27157, USA.
authors.forename: Tiffany B
authors.initials: TB
authors.lastname: Salido
authors.forename: W Gregory
authors.initials: WG
authors.lastname: Hundley
authors.forename: Kerry M
authors.initials: KM
authors.lastname: Link
authors.forename: Frederick H
authors.initials: FH
authors.lastname: Epstein
authors.forename: Craig A
authors.initials: CA
authors.lastname: Hamilton
mesh_terms: D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D019028:Magnetic Resonance Imaging, Cine / Q000379:methods*; D008955:Models, Cardiovascular; D009200:Myocardial Contraction / Q000502:physiology*; D019047:Phantoms, Imaging; D016277:Ventricular Function, Left / Q000502:physiology*