A modified quadrupole gradient set for use in high resolution MRI tagging

Magn Reson Med. 1994 Aug;32(2):246-50. doi: 10.1002/mrm.1910320215.

Abstract

A special purpose gradient set with a Cos(2 theta) current distribution has been constructed for high resolution MR imaging of small samples in a clinical Signa 1.5 T scanner using the existing gradient amplifiers. The X, Y, and Z gradient coils can attain gradient field strengths of 11.3, 4.7, and 15.2 G/cm at 100 amps current, respectively, with a slew rate of 20 G/cm/ms and usable ramp time of 150 microseconds. Field distortions are less than 2% over the central 8 cm of the bore, suitable for high resolution tagging of isolated canine hearts.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Animals
  • Dogs
  • Heart / anatomy & histology
  • Image Enhancement / methods
  • In Vitro Techniques
  • Magnetic Resonance Imaging / instrumentation
  • Magnetic Resonance Imaging / methods*