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Título
Anisotropy measure from three diffusion-encoding gradient directions
Autor
Año del Documento
2022
Editorial
Elsevier
Descripción
Producción Científica
Documento Fuente
Magnetic Resonance Imaging, 2022, vol. 88. p. 38-43
Abstract
We propose a method that can provide information about the anisotropy and orientation of diffusion in the brain from only 3 orthogonal gradient directions without imposing additional assumptions. The method is based on the Diffusion Anisotropy (DiA) that measures the distance from a diffusion signal to its isotropic equivalent. The original formulation based on a Spherical Harmonics basis allows to go down to only 3 orthogonal directions in order to estimate the measure. In addition, an alternative simplification and a color-coding representation are also proposed. Acquisitions from a publicly available database are used to test the viability of the proposal. The DiA succeeded in providing anisotropy information from the white matter using only 3 diffusion-encoding directions. The price to pay for such reduced acquisition is an increment in the variability of the data and a subestimation of the metric on those tracts not aligned with the acquired directions. Nevertheless, the calculation of anisotropy information from DMRI is feasible using fewer than 6 gradient directions by using DiA. The method is totally compatible with existing acquisition protocols, and it may provide complementary information about orientation in fast diffusion acquisitions.
Palabras Clave
Anisotropy
Anisotropía
Brain
Cerebro
ISSN
0730-725X
Revisión por pares
SI
Patrocinador
Ministerio de Ciencia e Innovación (grant RTI2018-094569-B-I00)
Wellcome Trust Investigator Award (award 096646/Z/11/Z)
Wellcome Trust Strategic Award (award 104943/Z/14/Z)
Wellcome Trust Investigator Award (award 096646/Z/11/Z)
Wellcome Trust Strategic Award (award 104943/Z/14/Z)
Propietario de los Derechos
© 2022 The Authors
Idioma
eng
Tipo de versión
info:eu-repo/semantics/publishedVersion
Derechos
openAccess
Collections
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