Výsledky vyhledávání - "Olesen, Jonas L."

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MP-PCA denoising of fMRI time-series data can lead to artificial activation 'spreading'

Autor: Fernandes, Francisca F., Olesen, Jonas L., Jespersen, Sune N., Shemesh, Noam

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. In rodents, thermal noise in the coils is an important source of noi

Externí odkaz: http://arxiv.org/abs/2211.15401

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Tensor denoising of high-dimensional MRI data

Autor: Olesen, Jonas L., Ianus, Andrada, Østergaard, Leif, Shemesh, Noam, Jespersen, Sune N.

The signal to noise ratio (SNR) fundamentally limits the information accessible by magnetic resonance imaging (MRI). This limitation has been addressed by a host of denoising techniques, recently including so-called MPPCA: Principal component analysi

Externí odkaz: http://arxiv.org/abs/2203.16078

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Diffusion time dependence, power-law scaling, and exchange in gray matter

Autor: Olesen, Jonas L., Østergaard, Leif, Shemesh, Noam, Jespersen, Sune N.

Publikováno v: NeuroImage 251, p. 118976 (2022)

Diffusion MRI (dMRI) provides contrast that reflect diffusing spins' interactions with microstructural features of biological systems, but its specificity remains limited due to the ambiguity of its relation to the underlying microstructure. To impro

Externí odkaz: http://arxiv.org/abs/2108.09983

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