Open birdcage coil for head imaging at 7T

Purpose To theoretically describe, design, and test the new geometry of birdcage coil for 7 Tesla anatomical brain imaging, which includes a large window on top, without deliberately jeopardizing its homogeneity efficiency. This opencage will not only improve patient comfort but also enable volunteer to follow functional MRI stimuli. design could facilitate tracking compliance better correction movement. Methods Via transfer matrix approach, birdcage-like with nonperiodic distribution rungs is constructed optimized currents in rungs. Subsequently, adjusted full-wave simulations. Then, assembled, fine-tuned, matched bench. Finally, these results are confirmed experimentally phantom vivo. Results Indeed, computed isolation ?14.9 dB between feeding ports symmetry circular polarized mode pattern transmit RF magnetic field () showed that was properly optimized. An experimental assessment developed competitive efficiency coverage compared conventional similar size. Conclusion The proposed can be designed work dramatic drop performance terms homogeneity, (/), peak local specific absorption rate SAR (/).