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

✍ Scribed by Walter G. O'Dell; Joseph S. Schoeniger; Stephen J. Blackband; Elliot R. McVeigh

• Publisher: John Wiley and Sons
• Year: 1994
• Tongue: English
• Weight: 579 KB
• Volume: 32
• Category: Article
• ISSN: 0740-3194
• DOI: 10.1002/mrm.1910320215

✦ Synopsis

Abstract

A special purpose gradient set with a Cos(20) 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 μs. Field distortions are less than 2% over the central 8 cm of the bore, suitable for high resolution tagging of isolated canine hearts.