Fast triple-spin-echo Dixon (FTSED) sequence for water and fat imaging

Radim Korinek; Karel Bartusek; Zenon Starcuk Jr

doi:10.1016/j.mri.2016.11.015

Fast triple-spin-echo Dixon (FTSED) sequence for water and fat imaging

Magn Reson Imaging. 2017 Apr:37:164-170. doi: 10.1016/j.mri.2016.11.015. Epub 2016 Nov 24.

Authors

Radim Korinek¹, Karel Bartusek², Zenon Starcuk Jr²

Affiliations

¹ Institute of Scientific Instruments of the CAS, v. v. i., Czech Republic. Electronic address: radim.korinek@gmail.com.
² Institute of Scientific Instruments of the CAS, v. v. i., Czech Republic.

PMID: 27890779
DOI: 10.1016/j.mri.2016.11.015

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.

Keywords: 9.4T; FTSED; Fast triple-spin-echo Dixon; Fat fraction; MRI; Sequence; Ultra-high field; Water-fat.

MeSH terms

Adipose Tissue / diagnostic imaging*
Animals
Body Water / diagnostic imaging*
Humans
Image Processing, Computer-Assisted / methods*
Least-Squares Analysis
Magnetic Resonance Imaging / methods*
Male
Models, Animal
Phantoms, Imaging*
Rats