Literature DB >> 3683316

Reduction of pulsed gradient settling time in the superconducting magnet of a magnetic resonance instrument.

D J Jensen1, W W Brey, J L Delayre, P A Narayana.   

Abstract

The implementation of electronic compensation for eddy currents to reduce the gradient settling times on a superconducting magnet is described. Field plots inside the magnet indicate the importance of assessing the field changes at several positions in the magnet. The effect of an asymmetry between the gradient coil system and the cryostat is demonstrated. A modified compensation circuit is described to overcome this mechanical asymmetry.

Mesh：

Year:  1987        PMID： 3683316     DOI： 10.1118/1.596012

Source DB:  PubMed          Journal:  Med Phys        ISSN： 0094-2405            Impact factor:   4.071


  7 in total

1.  Compensation of gradient-induced magnetic field perturbations.

Authors:  Terence W Nixon; Scott McIntyre; Douglas L Rothman; Robin A de Graaf
Journal:  J Magn Reson       Date:  2008-02-23       Impact factor: 2.229

2.  Characterizing and correcting gradient errors in non-cartesian imaging: Are gradient errors linear time-invariant (LTI)?

Authors:  Ethan K Brodsky; Alexey A Samsonov; Walter F Block
Journal:  Magn Reson Med       Date:  2009-12       Impact factor: 4.668

3.  Parallel 2D FFT implementation on FPGA suitable for real-time MR image processing.

Authors:  Limin Li; Alice M Wyrwicz
Journal:  Rev Sci Instrum       Date:  2018-09       Impact factor: 1.523

4.  Quantification and compensation of eddy-current-induced magnetic-field gradients.

Authors:  William M Spees; Niels Buhl; Peng Sun; Joseph J H Ackerman; Jeffrey J Neil; Joel R Garbow
Journal:  J Magn Reson       Date:  2011-06-25       Impact factor: 2.229

5.  Dynamic Shimming of the Human Brain at 7 Tesla.

Authors:  Christoph Juchem; Terence W Nixon; Piotr Diduch; Douglas L Rothman; Piotr Starewicz; Robin A de Graaf
Journal:  Concepts Magn Reson Part B Magn Reson Eng       Date:  2010-07-06       Impact factor: 1.176

6.  Software compensation of eddy current fields in multislice high order dynamic shimming.

Authors:  Saikat Sengupta; Malcolm J Avison; John C Gore; E Brian Welch
Journal:  J Magn Reson       Date:  2011-03-08       Impact factor: 2.229

7.  Thermal variation in gradient response: measurement and modeling.

Authors:  Jennifer Nussbaum; Benjamin E Dietrich; Bertram J Wilm; Klaas P Pruessmann
Journal:  Magn Reson Med       Date:  2021-12-21       Impact factor: 3.737
  7 in total

北京卡尤迪生物科技股份有限公司 © 2022-2023.