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Multiple Slot Modules for High Field Magnetic Resonance Imaging Array Coils by Dheyaa Alkandari; John C. Bosshard; Chung‐Huan Huang; Steven M. Wright is a Medicine article available to read on EtoBox.

What is Multiple Slot Modules for High Field Magnetic Resonance Imaging Array Coils about?

Mitigating coupling effects between coil elements represents a continuing challenge. Here, we present a 16-bowtie slot volume coil arranged in eight independent dual-slot modules without the use of any decoupling circuits. Methods: Two electrically short "bowtie" slot antennas were used to form a "module." A bowtie configuration was chosen because electromagnetic modeling results show that bowtie slots exhibit improved efficiency when compared to thin rectangular slots. An eight-module volume coil was evaluated through electromagnetic modeling, bench tests, and MRI experiments at 4.7 T. ## Results: Bench tests indicate that worst-case coupling between modules did not exceed -14.5 dB. MR images demonstrate well-localized patterns about single excited modules confirming the low coupling between modules. Homogeneous MR images were acquired from a synthesized quadrature birdcage transmit mode. MRI experiments show that the RF power requirements for the proposed coil are 9.2 times more than a birdcage coil. Whereas from simulations performed to assess the proposed coil losses, the total power dissipated in the phantom was 1.1 times more for the birdcage. Simulation results at 7 T reveal

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Author

Dheyaa Alkandari; John C. Bosshard; Chung‐Huan Huang; Steven M. Wright

Publisher

Wiley

Published

2023

Language

EN

Field

Medicine (Health Sciences)