Edge-Enhancing Gradient-Echo MP2RAGE for Clinical Epilepsy Imaging at 7T

S. Tao; X. Zhou; E. Greco; V. Gupta; B.E. Freund; E.M. Westerhold; A.M. Feyissa; W.O. Tatum; S. Grewal; V. Patel; E.H. Middlebrooks

doi:10.3174/ajnr.A7782

Research ArticleAdult Brain

Edge-Enhancing Gradient-Echo MP2RAGE for Clinical Epilepsy Imaging at 7T

S. Tao, X. Zhou, E. Greco, V. Gupta, B.E. Freund, E.M. Westerhold, A.M. Feyissa, W.O. Tatum, S. Grewal, V. Patel and E.H. Middlebrooks

American Journal of Neuroradiology March 2023, 44 (3) 268-270; DOI: https://doi.org/10.3174/ajnr.A7782

S. Tao

aFrom the Departments of Radiology (S.T., X.Z., E.G., V.G., E.M.W., V.P., E.H.M.)

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X. Zhou

aFrom the Departments of Radiology (S.T., X.Z., E.G., V.G., E.M.W., V.P., E.H.M.)

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E. Greco

aFrom the Departments of Radiology (S.T., X.Z., E.G., V.G., E.M.W., V.P., E.H.M.)

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V. Gupta

aFrom the Departments of Radiology (S.T., X.Z., E.G., V.G., E.M.W., V.P., E.H.M.)

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B.E. Freund

bNeurology (B.E.F., A.M.F., W.O.T.)

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E.M. Westerhold

aFrom the Departments of Radiology (S.T., X.Z., E.G., V.G., E.M.W., V.P., E.H.M.)

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A.M. Feyissa

bNeurology (B.E.F., A.M.F., W.O.T.)

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W.O. Tatum

bNeurology (B.E.F., A.M.F., W.O.T.)

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S. Grewal

cNeurosurgery (S.G., E.H.M.), Mayo Clinic, Jacksonville, Florida

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V. Patel

aFrom the Departments of Radiology (S.T., X.Z., E.G., V.G., E.M.W., V.P., E.H.M.)

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E.H. Middlebrooks

aFrom the Departments of Radiology (S.T., X.Z., E.G., V.G., E.M.W., V.P., E.H.M.)

cNeurosurgery (S.G., E.H.M.), Mayo Clinic, Jacksonville, Florida

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Abstract

SUMMARY: The 3D edge-enhancing gradient-echo (EDGE) MR imaging sequence offers superior contrast-to-noise ratio in the detection of focal cortical dysplasia. EDGE could benefit from 7T MR imaging but also faces challenges such as image inhomogeneity and low acquisition efficiency. We propose an EDGE-MP2RAGE sequence that can provide both EDGE and T1-weighted contrast, simultaneously, improving data-acquisition efficiency. We demonstrate that with sequence optimization, EDGE images with sufficient uniformity and T1-weighted images with high gray-to-white matter contrast can be achieved.

ABBREVIATIONS:

CNR: contrast-to-noise ratio
EDGE: edge-enhancing gradient-echo
FCD: focal cortical dysplasia
INV: inversion imaging

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American Journal of Neuroradiology

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1 Mar 2023

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Edge-Enhancing Gradient-Echo MP2RAGE for Clinical Epilepsy Imaging at 7T