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Abstract #2611

B1-Control Receive Array Coil for Abdominal Imaging

Yukio Kaneko1, Yoshihisa Soutome1, Masayoshi Dohata1, Hideta Habara1, Hisaaki Ochi1, Yoshitaka Bito1

1Central Research Laboratory, Hitachi Ltd., Kokubunji, Tokyo, Japan

B1 inhomogeneity increases as strength of magnetic field increases. Various methods to reduce the B1 inhomogeneity have been developed. However, B1 inhomogeneity still remains in some cases of abdominal imaging, and a more effective method is required. In this study, a B1-control loop is combined with a receive array coil by using PIN diodes for generating the B1-control loop during the RF transmit period. A 12-channel gB1-control receive array coilh was fabricated, and both its receive sensitivity and the effect of B1 homogenization were confirmed experimentally. The B1-control receive array coil can improve B1 inhomogeneity, while maintaining receive sensitivity.

Keywords

abdomen abdominal according acrylic adding addition additional almost alone analyzer applied around arrangement array becomes birdcage blue body capacitors channel channels circuit coil coils combination combined comparing compensate composite conducted conductive connected consideration contrary control copper coupling cross decoupling decreased decreases defined degrees dense density detuning developed deviation diagram dielectric diodes dominant done double drive edge effective example exhibits experiment experimentally fabricated field flux frequency generating gradient homogeneity homogenization human impedance improve individual inductive inhomogeneity inner input install intensity japan laboratory little load locally loop loops loss made maintaining maps matrix measured measuring mode modes needed network noise normalized optimized others outside overlapped pads parallel partially period phantom previous principle problem quadrature receive recently rectifying reduce reduces reducing remains required respectively scanner schematic schematically sectional sensitivity setup shimming simulation slightly solve source space sparse spatial static still strength structure sufficiently switched tape tendency traditional trans transmission transmit unloaded upper various whose