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  First experimental results using RF Elements with Switching Transmit Sensitivities at ultrahigh field MRI

Bosch, D., Solomakha, G., Freudensprung, M., Glang, F., Avdievich, N., & Scheffler, K. (2024). First experimental results using RF Elements with Switching Transmit Sensitivities at ultrahigh field MRI. In ISMRM & ISMRT Annual Meeting & Exhibition 2024 (pp. 562).

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Item Permalink: https://hdl.handle.net/21.11116/0000-000F-39E1-3 Version Permalink: https://hdl.handle.net/21.11116/0000-000F-39E3-1
Genre: Meeting Abstract

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https://www.ismrm.org/24/docs/24ToC.pdf (Abstract)
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 Creators:
Bosch, D1, Author                 
Solomakha, G1, Author                 
Freudensprung, M, Author
Glang, F1, Author                 
Avdievich, N1, Author                 
Scheffler, K1, Author                 
Affiliations:
1Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497796              

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 Abstract: Motivation: Dipole RF elements with electronically switchable B field patterns have been shown to improve receive performance. The question whether they are beneficial for transmission is still open. Goal(s): Improve flip angle homogeneity by modulating the Tx sensitivity of a dipole during excitation. Approach: An RF coil built from eight dipoles with electronically switchable sensitivities was constructed. Achievable flip angle homogeneity with 2-kT-points pulses was evaluated in simulations and in experiments. Results: Flip angle homogeneity could be increased by electronically switching the Tx sensitivity during the course of the RF pulse. Impact: RF elements with switchable transmit sensitivities offer a novel degree of freedom for excitation that promises improved flip angle homogeneity. This addresses one of the most pressing problems in ultra-high field MRI.

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 Dates: 2024-05
 Publication Status: Published online
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Title: ISMRM & ISMRT Annual Meeting & Exhibition 2024
Place of Event: Singapore
Start-/End Date: 2024-05-04 - 2024-05-09

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Title: ISMRM & ISMRT Annual Meeting & Exhibition 2024
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: 1032 Start / End Page: 562 Identifier: -