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Abstract #4500

A detunable multi-row self-decoupled Transmit Array for 7 T ASL and brain spinal cord Imaging

Xinqiang Yan1,2, Yue Zhu1,2, and Ming Lu1,2
1Vanderbilt University Institute of Imaging Science, Nashville, TN, United States, 2Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, United States


Transmit arrays improves the transmit field homogeneity while reducing the local hot spot. Current array designs for the head are not optimized for arterial spin labeling and simultaneous brain and cervical spinal cord applications caused by the short longitudinal coverage. To approach this problem, we designed and constructed a three-row Tx array covering the whole brain and cervical spinal cords (length: 28 cm). The overall performance of the coil is good with return losses < -20 dB while having adjacent coils’ coupling averaging -25.3 dB and diagonal coil’s coupling averaging -14.6 dB. The coil’s detune circuit also worked as intended.

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