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Correction of gradient pulse shape distortions in radial MRI
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SYSNO ASEP 0568842 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Correction of gradient pulse shape distortions in radial MRI Author(s) Vitouš, Jiří (UPT-D) Source Title Proceedings II of the 28th Conference STUDENT EEICT 2022. Selected Papers. - Brno : Brno University of Technology, Faculty of Electrical Engineering and Communication, 2022 / Novák V. - ISSN 2788-1334 - ISBN 978-80-214-6030-0 Pages s. 264-268 Number of pages 5 s. Publication form Online - E Action STUDENT EEICT 2022 /28./ Event date 26.04.2022 - 26.04.2022 VEvent location Brno Country CZ - Czech Republic Event type CST Language eng - English Country CZ - Czech Republic Keywords MRI ; gradient ; Nelder–Mead ; slice ; adjustment Subject RIV FS - Medical Facilities ; Equipment OECD category Medical engineering R&D Projects LM2018129 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) EF18_046/0016045 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA22-10953S GA ČR - Czech Science Foundation (CSF) Institutional support UPT-D - RVO:68081731 Annotation 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. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2023 Electronic address https://www.eeict.cz/eeict_download/archiv/sborniky/EEICT_2022_sbornik_2_v3.pdf
Number of the records: 1