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Abstract #4996

Design Considerations Towards Size-Adaptive pTx Arrays for 7T Brain Imaging

Anpreet Ghotra1, Sam-Luca J.D. Hansen1, Yaren Aksu1, Mirsad Mahmutovic1, Manisha Shrestha1, and Boris Keil1,2
1Institute of Medical Physics and Radiation Protection, TH Mittelhessen University of Applied Sciences, Gießen, Germany, 2LOEWE Research Cluster for Advanced Medical Physics in Imaging and Therapy (ADMIT), TH Mittelhessen University of Applied Sciences, Gießen, Germany

Synopsis

Keywords: RF Arrays & Systems, Parallel Transmit & Multiband, adaptive Coil

Motivation: Enhancing MRI imaging at 7T requires overcoming B1+ field homogeneity challenges. Multichannel transmit arrays aim to address these issues for improved imaging quality.

Goal(s): Develop a size-adaptive 16-channel transceiver for precise head size customization at 7T, optimizing imaging quality and safety while maintaining SAR efficiency.

Approach: Utilize 3D-CAD design, simulation, and bench testing to evaluate the performance of the adaptive coil's segmented structure and adjustable components.

Results: The proposed 16-channel adaptive coil shows superior transmission efficiency and stable SAR performance, highlighting its potential for enhancing MRI imaging at 7T.

Impact: The novel 16-channel size-adaptive transceiver array for 7T enhances transmission efficiency with maintaining consistent SAR performance. Its four-segment design, featuring three adjustable segments (two lateral and one anterior), ensures precise head size customization with superior parallel imaging and safety.

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