401 citations · 1.7k across the 31 of their papers we have counts for
33 papers
Beyond directions: Symmetry-aware rotation sets for triaxial diffusion encoding by geometric filter optimization
Sune Nørhøj Jespersen, Filip Szczepankiewicz
Purpose: To improve the accuracy of diffusion-weighted powder average signals for diffusion encoding with arbitrary b-tensors. Methods: We identify an intrinsic dihedral () sy…
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…
MP-PCA denoising of fMRI time-series data can lead to artificial activation "spreading"
Francisca F. Fernandes, Jonas L. Olesen, Sune N. Jespersen +1
MP-PCA denoising has become the method of choice for denoising in MRI since it provides an objective threshold to separate the desired signal from unwanted thermal noise components…
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…