MRI Scanner and RF Coil Configuration

XG Xia Ge
JQ James D. Quirk
JE John A. Engelbach
GB G. Larry Bretthorst
SL Shunqiang Li
KS Kooresh I. Shoghi
JG Joel R. Garbow
JA Joseph J. H. Ackerman
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All experiments were performed on an Agilent/Varian (Santa Clara, CA) DirectDrive 4.7-T small-animal MR scanner built around an Oxford Instruments (Abingdon, UK) horizontal superconducting magnet, with a gradient/shim coil assembly having a 12-cm inner-bore diameter and providing 60 G/cm with 200-μs rise time. All MR images, including phantoms, were acquired using the same laboratory-built actively decoupled transmit (volume, 7.5-cm inner diameter) and receive (surface, 2.5-cm inner diameter) coil pair (8).

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