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Simultaneous 3D T1 and B1+ mapping at 7T using MPRAGE with multiple volumes and driven equilibrium (DE)

Olsson, Hampus LU ; Andersen, Mads LU ; Kadhim, Mustafa and Helms, Gunther LU orcid (2021) ISMRM and SMRT Annual Meeting and Exhibition 2021 In Proc Intl Soc Magn Reson Med 29.
Abstract
MP2RAGE has become popular for T1 mapping at 7T. Accuracy is yet improved by using a separately acquired flip angle map when creating the protocol-specific lookup table. Here, two additional volumes acquired at differing flip angles are added to an MP2RAGE sequence to obtain two separate states of driven equilibriums, effectively forming a dual flip angle protocol within the cycle. By estimating the accelerated effective relaxation, T1* from the signals, both T1 and B1+ can be solved for analytically. Thus, a multi-volume MPRAGE sequence is turned into a dedicated high-resolution T1 and flip angle-mapping protocol.
Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
host publication
Proceedings of the 2021 ISMRM & ISMRT Annual Meeting and Exhibition
series title
Proc Intl Soc Magn Reson Med
volume
29
article number
0550
publisher
International Society for Magnetic Resonance in Medicine
conference name
ISMRM and SMRT Annual Meeting and Exhibition 2021
conference dates
2021-05-15 - 2021-05-20
ISSN
1545-4428
project
Gradient echo-based quantitative MRI of human brain at 7T
Measuring T1 using MP2RAGE in Human Brain at 7T
Multiparametric mapping of the brain at 7T using gradient echoes
language
English
LU publication?
yes
id
e2e59d09-0ad5-425e-9372-a616901cd997
alternative location
https://index.mirasmart.com/ISMRM2021/PDFfiles/0550.html
date added to LUP
2021-05-18 20:30:45
date last changed
2025-04-04 15:16:58
@inproceedings{e2e59d09-0ad5-425e-9372-a616901cd997,
  abstract     = {{MP2RAGE has become popular for T<sub>1</sub> mapping at 7T. Accuracy is yet improved by using a separately acquired flip angle map when creating the protocol-specific lookup table. Here, two additional volumes acquired at differing flip angles are added to an MP2RAGE sequence to obtain two separate states of driven equilibriums, effectively forming a dual flip angle protocol within the cycle. By estimating the accelerated effective relaxation, T<sub>1</sub>* from the signals, both T<sub>1</sub> and B<sub>1</sub><sup>+</sup> can be solved for analytically. Thus, a multi-volume MPRAGE sequence is turned into a dedicated high-resolution T<sub>1</sub> and flip angle-mapping protocol.}},
  author       = {{Olsson, Hampus and Andersen, Mads and Kadhim, Mustafa and Helms, Gunther}},
  booktitle    = {{Proceedings of the 2021 ISMRM & ISMRT Annual Meeting and Exhibition}},
  issn         = {{1545-4428}},
  language     = {{eng}},
  month        = {{04}},
  publisher    = {{International Society for Magnetic Resonance in Medicine}},
  series       = {{Proc Intl Soc Magn Reson Med}},
  title        = {{Simultaneous 3D T<sub>1</sub> and B<sub>1</sub><sup>+</sup> mapping at 7T using MPRAGE with multiple volumes and driven equilibrium (DE)}},
  url          = {{https://index.mirasmart.com/ISMRM2021/PDFfiles/0550.html}},
  volume       = {{29}},
  year         = {{2021}},
}