Improved respiratory self-navigation for 3D radial acquisitions through the use of a pencil-beam 2D-T<sub>2</sub> -prep for free-breathing, whole-heart coronary MRA.
Details
Serval ID
serval:BIB_4687C0096860
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Improved respiratory self-navigation for 3D radial acquisitions through the use of a pencil-beam 2D-T<sub>2</sub> -prep for free-breathing, whole-heart coronary MRA.
Journal
Magnetic resonance in medicine
ISSN
1522-2594 (Electronic)
ISSN-L
0740-3194
Publication state
Published
Issued date
03/2018
Peer-reviewed
Oui
Volume
79
Number
3
Pages
1293-1303
Language
english
Notes
Publication types: Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Publication Status: ppublish
Abstract
In respiratory self-navigation (SN), signal from static structures, such as the chest wall, may complicate motion detection or introduce post-correction artefacts. Suppressing signal from superfluous tissues may therefore improve image quality. We thus test the hypothesis that SN whole-heart coronary magnetic resonance angiography (MRA) will benefit from an outer-volume suppressing 2D-T <sub>2</sub> -Prep and present both phantom and in vivo results.
A 2D-T <sub>2</sub> -Prep and a conventional T <sub>2</sub> -Prep were used prior to a free-breathing 3D-radial SN sequence. Both techniques were compared by imaging a home-built moving cardiac phantom and by performing coronary MRA in nine healthy volunteers. Reconstructions were performed using both a reference-based and a reference-independent approach to motion tracking, along with several coil combinations. Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were compared, along with vessel sharpness (VS).
In phantoms, using the 2D-T <sub>2</sub> -Prep increased SNR by 16% to 53% and mean VS by 8%; improved motion tracking precision was also achieved. In volunteers, SNR increased by an average of 29% to 33% in the blood pool and by 15% to 25% in the myocardium, depending on the choice of reconstruction coils and algorithm, and VS increased by 34%.
A 2D-T <sub>2</sub> -Prep significantly improves image quality in both phantoms and volunteers when performing SN coronary MRA. Magn Reson Med 79:1293-1303, 2018. © 2017 International Society for Magnetic Resonance in Medicine.
A 2D-T <sub>2</sub> -Prep and a conventional T <sub>2</sub> -Prep were used prior to a free-breathing 3D-radial SN sequence. Both techniques were compared by imaging a home-built moving cardiac phantom and by performing coronary MRA in nine healthy volunteers. Reconstructions were performed using both a reference-based and a reference-independent approach to motion tracking, along with several coil combinations. Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) were compared, along with vessel sharpness (VS).
In phantoms, using the 2D-T <sub>2</sub> -Prep increased SNR by 16% to 53% and mean VS by 8%; improved motion tracking precision was also achieved. In volunteers, SNR increased by an average of 29% to 33% in the blood pool and by 15% to 25% in the myocardium, depending on the choice of reconstruction coils and algorithm, and VS increased by 34%.
A 2D-T <sub>2</sub> -Prep significantly improves image quality in both phantoms and volunteers when performing SN coronary MRA. Magn Reson Med 79:1293-1303, 2018. © 2017 International Society for Magnetic Resonance in Medicine.
Keywords
Adult, Algorithms, Coronary Angiography/methods, Female, Heart/diagnostic imaging, Humans, Imaging, Three-Dimensional/methods, Magnetic Resonance Angiography/methods, Male, Phantoms, Imaging, 2D, T2-Prep, adiabatic, coronary, inner volume, iterative, self-navigation
Pubmed
Web of science
Create date
19/06/2017 8:43
Last modification date
20/08/2019 13:52
Usage data
