Stanislas Rapacchi1
1CNRS Aix-Marseille University, Marseille, France
Synopsis
This
presentation presents an overview of multi-contrasts approaches in MRI, from a simple
but technical point of view. The presentation starts from two simple examples of
multi-contrasts approaches and continues with quantitative multi-contrast
approaches. The presentation compares all these approaches in 3 points: 1/ the
acquisition schemes that allows to probe multiple contrasts at once, 2/ the
underlying model that maps MR signal onto multiple contrasts and allows to disentangle
them and 3/ the output contrasts that are eventually provided by the approach
of interest. Finally, we will review extensions of multi-contrast approaches
with synthetic imaging, segmentation, and standardized reporting.
Summary
This
presentation presents an overview of multi-contrasts approaches in MRI, from a simple
but technical point of view. The purpose is to provide clinicians with elements
of understanding and criticism when using multi-contrast MRI. The presentation
starts from some simple examples of multi-contrasts approaches that unlocked contrasts
from acquisitions that did not provide those contrasts initially. Then, the
core of this talk is to cover the various quantitative multi-contrast
approaches, including several steady-state multi-contrast MRI techniques, and
the few and recent transient-state multi-contrast approaches. The presentation systematically
compares all these approaches in 3 points: 1/ the acquisition scheme that allows
to probe multiple contrasts at once, 2/ the underlying model that maps MR
signal onto multiple contrasts and allows to disentangle them and 3/ the output
contrasts that are eventually provided by the approach of interest. After this
overview, we will review extensions of multi-contrast approaches that facilitate
clinical integration and add value for the clinicians with synthetic imaging, segmentation,
and standardized reporting. Finally, I would like to equip the audience with the
scientific metrics of merits that have been proposed to compare the quantitative
multi-contrast approaches. These metrics can raise criticism on each of these
approaches with tangible and scientific arguments.Acknowledgements
I would like to acknowledge all sources of material detailled in the references, and my colleagues at the CRMBM for fruitful discussions on building this class.References
Ginami G,
et al. Magn
Reson
Med. 2018;79(3):1460-1472
Ginami G,
et al. J Cardiovasc Magn Reson. 2017 27;19(1):94.
Correia, T., et al. J Cardiovasc Magn Reason 2020, 88
Chen S, al. J Magn Reson
Imaging. 2018;47(3):634-639.
Dixon
WT. Radiology. 1984 Oct;153(1):189-94.
Jafari et al. J Magn Reson Imaging. 2019. 50(3): 725–732
Hagiwara A, al. Invest Radiol.
2017;52(10):647-657.
Warntjes,
J., et al. Magn.
Reson.
Med. 2008, 60: 320-329.
Boudabbous,
S, et al. Acta Radiologica Open, 2018, vol. 7, no.
5
Deoni SC,
et al. Magn
Reson
Med. 2003;49(3):515-26.
Teixeira RPAG, Magn Reson Med.
2018;79(1):234-245
Shcherbakova Y, et al. Magn Reson Med. 2018;79(2):711-722.
Wood TC, et al. Magn Reson Med.
2020 ;84(2):857-865
Gavazzi S, et al. Magn Reson Med.
2020;83(2):590-607
SyntheticMR
White Paper 2017
Assländer,J . JMRI.
2021;53:676–685.
Hu et
Peter, MRM. 2019; 81(6): 3515–3529
Leitão et
al. arXiv
2021, eprint
2005.02876