To mask or not to mask? Investigating the impact of accounting for spatial frequency distributions and susceptibility sources on QSM quality

Autor:	Sandgaard, Anders Dyhr, Shemesh, Noam, Jespersen, Sune Nørhøj, Kiselev, Valerij G.
Rok vydání:	2022
Předmět:	Physics - Medical Physics Physics - Biological Physics
Druh dokumentu:	Working Paper
Popis:	Estimating magnetic susceptibility using MRI depends on inverting a forward relationship between the susceptibility and measured Larmor frequency. However, an often-overlooked constraint in susceptibility fitting is that the Larmor frequency is only measured inside the sample, and after background field removal, susceptibility sources should only reside inside the same sample. Here we test the impact of accounting for such effects in susceptibility fitting and demonstrate that such effects should not be ignored. Comment: 21 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2208.01906 Zobrazit plný text záznamu View this record from Arxiv