Original title: Correction of gradient pulse shape distortions in radial MRI
Authors: Vitouš, Jiří
Document type: Papers
Conference/Event: STUDENT EEICT 2022 /28./, Brno (CZ), 20220426
Year: 2022
Language: eng
Abstract: This paper focuses on the optimization of gradient-pulse shapes in MRI measurement. The main topic investigated in this paper is optimization of slice-selective gradient, where imperfections may produce phase distortion in the resulting image and also signal loss in the acquired signal. A method for correction is proposed based on the Nelder-Mead algorithm followed by coordinate ascent search in the neighborhood of the found solution. The adjustment is evaluated using a simple Fast low angle shot (FLASH) sequence with radial readout. The results show a significant improvement in the Free induction decay (FID) signal magnitude, echo stability, and an improvement in the homogeneity of image phase.
Keywords: adjustment; gradient; MRI; Nelder–Mead; slice
Project no.: LM2018129 (CEP), EF18_046/0016045, GA22-10953S (CEP)
Funding provider: GA MŠk, GA MŠk, GA ČR
Host item entry: Proceedings II of the 28th Conference STUDENT EEICT 2022. Selected Papers, ISBN 978-80-214-6030-0, ISSN 2788-1334

Institution: Institute of Scientific Instruments AS ČR (web)
Document availability information: Fulltext is available at external website.
External URL: https://www.eeict.cz/eeict_download/archiv/sborniky/EEICT_2022_sbornik_2_v3.pdf
Original record: https://hdl.handle.net/11104/0340112

Permalink: http://www.nusl.cz/ntk/nusl-521041


The record appears in these collections:
Research > Institutes ASCR > Institute of Scientific Instruments
Conference materials > Papers