Shielded gradient coils and radio frequency probes for high-resolution imaging of rat brains

✍ Scribed by Andrzej Jasinski; Tomasz Jakubowski; Marek Rydzy; Paul Morris; Ian C. P. Smith; Piotr Kozlowski; John K. Saunders

• Publisher: John Wiley and Sons
• Year: 1992
• Tongue: English
• Weight: 735 KB
• Volume: 24
• Category: Article
• ISSN: 0740-3194
• DOI: 10.1002/mrm.1910240104

✦ Synopsis

Abstract

A shielded gradient system and radio frequency probes for a 4.7‐T/30‐cm horizontal bore magnet are described. The systems were designed principally to obtain images and localized spectra from rat brains. The gradients can operate in either a shielded or non shielded mode. The rf probe, which combines both highest sensitivity and highest resolution, consists of a large modified saddle type transmitter and a small surface reception coil, actively decoupled using diodes. The system performance is demonstrated on phantoms and on a rat brain, where an image with in plane resolution of 80μ m and a slice thickness of 150 μm is obtained. © 1992 Academic Press, Inc.