Ústav teorie informace a automatizace

Jste zde

Bibliografie

Conference Paper (international conference)

Iterative Methods for Fast Reconstruction of Undersampled Dynamic Contrast-Enhanced MRI Data

Walner Hynek, Bartoš Michal, Mangová M., Keunen O., Bjerkvig R., Jiřík Radovan, Šorel Michal

: World Congress on Medical Physics and Biomedical Engineering 2018, p. 267-271 , Eds: Lhotská L., Sukupová L., Lacković I., Ibbott G.S.

: World Congress on Medical Physics and Biomedical Engineering 2018, (Praha, CZ, 20180603)

: GA16-13830S, GA ČR

: DCE-MRI, Iterative reconstruction techniques, Compressed sensing

: 10.1007/978-981-10-9035-6_48

: http://library.utia.cas.cz/separaty/2018/ZOI/walner-0490787.pdf

(eng): This paper introduces new variational formulation for reconstruction from subsampled dynamic contrast-enhanced DCE-MRI data, that combines a data-driven approach using estimated temporal basis and total variation regularization (PCA TV). We also experimentally compares the performance of such model with two other state-of-the-art formulations. One models the shape of perfusion curves in time as a sum of a curve belonging to a low-dimensional space and a function sparse in a suitable domain (L + S model). The other possibility is to regularize both spatial and time domains (ICTGV). We are dealing with the specific situation of the DCE-MRI acquisition with a 9.4T small animal scanner, working with noisier signals than human scanners and with a smaller number of coil elements that can be used for parallel acquisition and small voxels. Evaluation of the selected methods is done through subsampled reconstruction of radially-sampled DCE-MRI data. Our analysis shows that compressed sensed MRI in the form of regularization can be used to increase the temporal resolution of acquisition while keeping a sufficient signal-to-noise ratio.

: JD

: 10201

07.01.2019 - 08:39