Improved Time-of-flight Magnetic Resonance Angiography with IDEAL Water-fat Separation

Overview

Journal J Magn Reson Imaging

Date 2009 May 28

PMID 19472410

Citations 6

Authors

Allison Grayev

Ann Shimakawa

Joseph Cousins

Patrick Turski

Jean Brittain

Scott Reeder

Affiliations

Soon will be listed here.

Abstract

Purpose: To implement IDEAL (iterative decomposition of water and fat using echo asymmetry and least squares estimation) water-fat separation with 3D time-of-flight (TOF) magnetic resonance angiography (MRA) of intracranial vessels for improved background suppression by providing uniform and robust separation of fat signal that appears bright on conventional TOF-MRA.

Materials And Methods: IDEAL TOF-MRA and conventional TOF-MRA were performed in volunteers and patients undergoing routine brain MRI/MRA on a 3T magnet. Images were reviewed by two radiologists and graded based on vessel visibility and image quality.

Results: IDEAL TOF-MRA demonstrated statistically significant improvement in vessel visibility when compared to conventional TOF-MRA in both volunteer and clinical patients using an image quality grading system. Overall image quality was 3.87 (out of 4) for IDEAL versus 3.55 for conventional TOF imaging (P = 0.02). Visualization of the ophthalmic artery was 3.53 for IDEAL versus 1.97 for conventional TOF imaging (P < 0.00005) and visualization of the superficial temporal artery was 3.92 for IDEAL imaging versus 1.97 for conventional TOF imaging (P < 0.00005).

Conclusion: By providing uniform suppression of fat, IDEAL TOF-MRA provides improved background suppression with improved image quality when compared to conventional TOF-MRA methods.

Citing Articles

High spatial resolution whole-neck MR angiography using thin-slab stack-of-stars quiescent interval slice-selective acquisition.

Koktzoglou I, Huang R, Ong A, Aouad P, Walker M, Edelman R Magn Reson Med. 2020; 84(6):3316-3324.

PMID: 32521094 PMC: 7722209. DOI: 10.1002/mrm.28339.

Noncontrast free-breathing respiratory self-navigated coronary artery cardiovascular magnetic resonance angiography at 3 T using lipid insensitive binomial off-resonant excitation (LIBRE).

Bastiaansen J, van Heeswijk R, Stuber M, Piccini D J Cardiovasc Magn Reson. 2019; 21(1):38.

PMID: 31291957 PMC: 6621993. DOI: 10.1186/s12968-019-0543-6.

Usefulness of IDEAL T2 imaging for homogeneous fat suppression and reducing susceptibility artefacts in brachial plexus MRI at 3.0 T.

Tagliafico A, Bignotti B, Tagliafico G, Martinoli C Radiol Med. 2015; 121(1):45-53.

PMID: 26253383 DOI: 10.1007/s11547-015-0576-3.

Fat-subtracted three-dimensional time-of-flight MR angiography of the neck by use of fat-only images with the two-point Dixon technique.

Fujiwara Y, Ishimori Y, Yamaguchi I, Kosaka N, Kimura H, Adachi T Radiol Phys Technol. 2015; 8(2):193-9.

PMID: 25577234 DOI: 10.1007/s12194-015-0307-4.

The Role of 3 Tesla MRA in the Detection of Intracranial Aneurysms.

Kapsalaki E, Rountas C, Fountas K Int J Vasc Med. 2012; 2012:792834.

PMID: 22292121 PMC: 3265088. DOI: 10.1155/2012/792834.