RT info:eu-repo/semantics/article
T1 Robust Estimation of the Apparent Diffusion Coefficient Invariant to Acquisition Noise and Physiological Motion
A1 Sanz Estébanez, Santiago Rodrigo
A1 Pieciak, Tomasz
A1 Alberola López, Carlos
A1 Aja Fernández, Santiago
AB Purpose: In this work we have proposed a methodology for the estimation of the apparent diffusion coeffcient in the body from multiple breath hold diffusion weighted images, which is robust to two preeminent confounding factors: noise and motion during acquisition.Methods: We have extended a method for the joint groupwise multimodal registration and apparent diffusion coefficient estimation, previously proposed by the authors, in order to correct the bias that arises from the non-Gaussianity of the data and the registration procedure.Results: Results show that the proposed methodology provides a statistically signi ficant improvement both in robustness for displacement  elds calculation and in terms of accuracy for the apparent diffusion coefficient estimation as compared with traditional sequential approaches. Reproducibility has also been measured on real data in terms of the distribution of apparent diffusion coefficient differences obtained from different b-values subsets.Conclusions: Our proposal has shown to be able to effectively correct the estimation bias by introducing additional computationally light procedures to the original method, thus providing robust apparent diffusion coefficient maps in the liver and allowing an accurate and reproducible analysis of the tissue.
YR 2018
FD 2018
LK http://uvadoc.uva.es/handle/10324/31382
UL http://uvadoc.uva.es/handle/10324/31382
LA spa
NO Magnetic Resonance Imaging, Julio 2018
DS UVaDOC
RD 23-nov-2024