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  Investigations on accelerated imaging at 9.4T with electronically modulated time-varying receive sensitivities

Glang, F., Buckenmaier, K., Bause, J., Loktyushin, A., Avdievitch, N., & Scheffler, K. (2021). Investigations on accelerated imaging at 9.4T with electronically modulated time-varying receive sensitivities. Poster presented at 2021 ISMRM & SMRT Annual Meeting & Exhibition (ISMRM 2021).

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Glang, F1, 2, Author              
Buckenmaier, K1, 2, Author              
Bause, J1, 2, Author              
Loktyushin, A1, 2, Author              
Avdievitch, N1, 2, Author              
Scheffler, K1, 2, Author              
Affiliations:
1Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497796              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              

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 Abstract: In this work, it is assessed how electronically modulated time-varying receive sensitivities can improve parallel imaging reconstruction at 9.4T. The required sensitivity modulation is achieved by introducing variable capacitance diodes (varactors) in the receive loops that can be independently adjusted to modify B1- profiles. A prototype 4 channel receive array was built, and measured and simulated receive profiles were compared. Additionally, simulations were conducted regarding potential for g-factor improvement. It was found that potential improvements strongly depend on the B1- switching patterns during k-space acquisition, where strongest improvements are to be expected from fast B1- modulations.

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 Dates: 2021-05
 Publication Status: Published online
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Title: 2021 ISMRM & SMRT Annual Meeting & Exhibition (ISMRM 2021)
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Start-/End Date: 2021-05-15 - 2021-05-20

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Title: 2021 ISMRM & SMRT Annual Meeting & Exhibition (ISMRM 2021)
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: 0910 Start / End Page: - Identifier: -