Growing importance of brain morphometry analysis in the clinical routine: The hidden impact of MR sequence parameters.

Rebsamen, Michael; Capiglioni, Milena; Hoepner, Robert; Salmen, Anke; Wiest, Roland; Radojewski, Piotr; Rummel, Christian (2024). Growing importance of brain morphometry analysis in the clinical routine: The hidden impact of MR sequence parameters. Journal of neuroradiology, 51(1), pp. 5-9. Elsevier Masson 10.1016/j.neurad.2023.04.003

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Volumetric assessment based on structural MRI is increasingly recognized as an auxiliary tool to visual reading, also in examinations acquired in the clinical routine. However, MRI acquisition parameters can significantly influence these measures, which must be considered when interpreting the results on an individual patient level. This Technical Note shall demonstrate the problem. Using data from a dedicated experiment, we show the influence of two crucial sequence parameters on the GM/WM contrast and their impact on the measured volumes. A simulated contrast derived from acquisition parameters TI/TR may serve as surrogate and is highly correlated (r=0.96) with the measured contrast.

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