title: Fast triple-spin-echo Dixon (FTSED) sequence for water and fat imaging.
abstract: A number of 'Dixon' techniques based on fast spin echo (FSE) sequence have been proposed and successfully used in many branches of medicine. Some require only one scan, but most of them need multiple scans and long scan times. This article describes a new fast triple-spin-echo Dixon (FTSED) technique suitable for ultra-high field MRI, in which three specific time shifts are introduced in the echo train; thus, three images with defined water-fat phase-differences (0, π, 2π) are encoded in the phase of the acquired images without extreme restrictions upon the echo duration. The water and fat images are then calculated by iterative least-squares estimation method. The sequence was successfully implemented at a 9.4T ultra-high field MRI system and tested on a phantom and a rat.
authors.affiliation: Institute of Scientific Instruments of the CAS, v. v. i., Czech Republic. Electronic address: radim.korinek@gmail.com.
authors.forename: Radim
authors.initials: R
authors.lastname: Korinek
authors.affiliation: Institute of Scientific Instruments of the CAS, v. v. i., Czech Republic.
authors.forename: Karel
authors.initials: K
authors.lastname: Bartusek
authors.affiliation: Institute of Scientific Instruments of the CAS, v. v. i., Czech Republic.
authors.forename: Zenon
authors.initials: Z
authors.lastname: Starcuk
mesh_terms: D000273:Adipose Tissue / Q000000981:diagnostic imaging*; D000818:Animals; D001834:Body Water / Q000000981:diagnostic imaging*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D016018:Least-Squares Analysis; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D023421:Models, Animal; D019047:Phantoms, Imaging; D051381:Rats
keywords: 9.4T; FTSED; Fast triple-spin-echo Dixon; Fat fraction; MRI; Sequence; Ultra-high field; Water-fat