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Abstract #0309

A Highly Decoupled 8-Channel Transmit-Receive Loop Array for 7T with Diverse B1 Profiles

Graham Charles Wiggins1, Bei Zhang1, Gang Chen2, Daniel Sodickson1

1The Bernard and Irene Schwartz Center for Biomedical Imaging, NYU Medical Center, New York, NY, United States; 2The Sackler Institute of Graduate Biomedical Science, NYU School of Medicine, New York, NY, United States

While neighboring coil elements can be decoupled by various means, it is more difficult to mitigate the often substantial coupling to next nearest neighbors. This is particularly problematic with transmit arrays, since preamp decoupling cannot be used to control next nearest neighbor coupling. We present a novel array design with triangular elements which allows capacitive decoupling between neighboring coils and inductive decoupling between next nearest neighbor coils. The triangular elements also present diverse B1 profiles, allowing for acceleration along the Z direction.

Keywords

acceleration achieve acquisitions active advantages aliasing allow allows appropriate array arrays attaching back biomedical birdcage built cable cables capacitively capacitor channel circuit circuits coax coil coils combined common comparable conductive consisted consisting constructed control corn coronal coupled coupling decouple decoupled decoupling designs diagrams diameter difficult distribution diverse divided driving drops edges efficiency efficient either element elements example excitation explicit field flash force gang gradient graduate graham heavy highly house huge identical individual inductor interface isolation legs length load loop made many maps match maximize medical minimize move much nearest nearly neighboring neighbors next outs overall parallel pass pattern performance periphery phantom plots ports power preamp preparation profiles properties proved receive reception reconstructed recorded reduce respectively rest ring root routed scanner school shared shielded side since splitter squares strategies structures substantial surface swap switch symmetrical tight tissue tool towards transmission transmit trap triangle triangular turbo typical unaffected variation various voltage volts width