Publication detail

Correction of gradient pulse shape distortions in radial MRI

VITOUŠ, J.

Original Title

Correction of gradient pulse shape distortions in radial MRI

Type

conference paper

Language

English

Original 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

MRI, gradient, Nelder-Mead, slice, adjustment

Authors

VITOUŠ, J.

Released

26. 4. 2022

Publisher

Brno University of Technology, Faculty of Electrical Engineering and Communication

Location

Brno

ISBN

978-80-214-6030-0

Book

Proceedings II of the 28 th Conference STUDENT EEICT 2022 Selected Papers

Edition

1

Pages from

264

Pages to

268

Pages count

5

URL

https://www.eeict.cz/eeict_download/archiv/sborniky/EEICT_2022_sbornik_2.pdf

BibTex

@inproceedings{BUT177792,
  author="Jiří {Vitouš}",
  title="Correction of gradient pulse shape distortions in radial MRI",
  booktitle="Proceedings II of the 28 th Conference STUDENT EEICT 2022 Selected Papers",
  year="2022",
  series="1",
  pages="264--268",
  publisher="Brno University of Technology, Faculty of Electrical Engineering and Communication",
  address="Brno",
  isbn="978-80-214-6030-0",
  url="https://www.eeict.cz/eeict_download/archiv/sborniky/EEICT_2022_sbornik_2.pdf"
}

Responsibility: Ing. Marek Strakoš