1 citations · 1 across the 7 of their papers we have counts for
7 papers
Predicting Mesoscopic Larmor Frequency Shifts in Ex Vivo Porcine Optic Nerve
Anders Dyhr Sandgaard, André Pampel, Roland Müller +7
Larmor frequency shifts in white matter (WM) vary with fiber orientation due to anisotropic microstructure. Since clinical voxels are significantly larger than these microscopic fr…
Axonal microstructure and compartmentalization impact the orientation and time dependence of mesoscopic transverse relaxation
Anders Dyhr Sandgaard, Rafael Neto Henriques, Noam Shemesh +1
In biological tissue, MR transverse relaxation stems from mechanisms spanning multiple scales, from molecular dipole-dipole interactions to mesoscopic field variations driven by ti…
Predicting Mesoscopic Larmor Frequency Shifts in White Matter with Diffusion MRI -- A Monte-Carlo Study in axonal phantoms
Anders Dyhr Sandgaard, Sune Nørhøj Jespersen
This study aims to validate if MRI can measure anisotropic mesoscopic Larmor frequency shifts from white matter axonal microstructure relative to the B0 direction and if dMRI can e…
The Larmor frequency shift of a white matter magnetic microstructure model with multiple sources
Anders Dyhr Sandgaard, Noam Shemesh, Leif Østergaard +2
Magnetic susceptibility imaging may provide valuable information about chemical composition and microstructural organization of tissue. However, its estimation from the MRI signal…
Incorporating the effect of white matter microstructure in the estimation of magnetic susceptibility in ex-vivo mouse brain
Anders Dyhr Sandgaard, Valerij G. Kiselev, Rafael Neto Henriques +2
Accurate estimation of microscopic magnetic field variations induced in biological tissue can be valuable for mapping tissue composition in health and disease. Here, we present an…
To mask or not to mask? Investigating the impact of accounting for spatial frequency distributions and susceptibility sources on QSM quality
Anders Dyhr Sandgaard, Noam Shemesh, Sune Nørhøj Jespersen +1
Estimating magnetic susceptibility using MRI depends on inverting a forward relationship between the susceptibility and measured Larmor frequency. However, an often-overlooked cons…
Larmor frequency shift from magnetized cylinders with arbitrary orientation distribution
Anders Dyhr Sandgaard, Noam Shemesh, Valerij G. Kiselev +1
We present a theoretical framework for the NMR and MRI measured Larmor frequency in media with magnetized microstructure using the mesoscopic Lorentz sphere and the principle of co…