Hideta Habara1 and Shinichiro Suzuki1
1Healthcare Business Unit, Hitachi, Ltd., Tokyo, Japan
1Healthcare Business Unit, Hitachi, Ltd., Tokyo, Japan
Design of asymmetric ring diameter birdcage volume coil has been studied by electromagnetic filed simulations. Increasing the gap between the ring and the RF shield has an advantage in efficiency even applied on one side of the ring.
Fig.1. Side view of the asymmetric ring and asymmetric gap birdcage coil. The front side ring has the larger diameter and narrower gap to the RF shield.
Fig.3. B1+ amplitude line profile for the model (B) and (C) at the coronal plane and X=20 cm along the head-feet direction. Uniformity between Z=±10 cm greatly improved by taking the design of asymmetric ring width in the model (C).