title: Constraining the initial phase in water-fat separation.
abstract: An algorithm is described for use in chemical shift-based water-fat separation to constrain the phase of both species to be equal at an echo time of zero. This constraint is physically reasonable since the initial phase should be a property of the excitation pulse and receiver coil only. The advantages of phase constrained water-fat separation, namely, improved noise performance and/or reduced data requirements (fewer echos), are demonstrated in simulations and experiments.
authors.affiliation: Department of Radiology, University of California San Diego, San Diego, CA, USA. mbydder@ucsd.edu
authors.forename: Mark
authors.initials: M
authors.lastname: Bydder
authors.forename: Takeshi
authors.initials: T
authors.lastname: Yokoo
authors.forename: Huanzhou
authors.initials: H
authors.lastname: Yu
authors.forename: Michael
authors.initials: M
authors.lastname: Carl
authors.forename: Scott B
authors.initials: SB
authors.lastname: Reeder
authors.forename: Claude B
authors.initials: CB
authors.lastname: Sirlin
mesh_terms: D000005:Abdomen / Q000033:anatomy & histology* / Q000502:physiology*; D000273:Adipose Tissue / Q000033:anatomy & histology*; D000465:Algorithms; D001834:Body Water / Q000378:metabolism*; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013382:Subtraction Technique