DREAM-zero: optimized variable flip angles for decreased image blurring in 
magnetization-prepared DREAM sequences

Weinmüller, S; Baum, T; Dang, HN; Endres, J; Zaiss, M

doi:10.1007/s10334-023-01108-9

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DREAM-zero: optimized variable flip angles for decreased image blurring in magnetization-prepared DREAM sequences

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Zaiss, M
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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引用

Weinmüller, S., Baum, T., Dang, H., Endres, J., & Zaiss, M. (2023). DREAM-zero: optimized variable flip angles for decreased image blurring in magnetization-prepared DREAM sequences. Poster presented at 39th Annual Scientific Meeting of the European Society for Magnetic Resonance in Medicine and Biology (ESMRMB 2023) Online.

引用: https://hdl.handle.net/21.11116/0000-000D-D7AF-C

要旨

Introduction: The ‘‘dual refocusing echo acquisition mode’’ (DREAM) sequence is one of the fastest methods for B1 mapping in 2D, and 3D [1]. The DREAM sequence acquires two signals jointly, the stimulated echo (STE), and a free induction decay (FID) signal. The STE decays to zero, while the FID signal approaches a steady state via a T1 Look-Locker-decay, leading to a strong signal blurring affecting intensity and contrast of both, the STE and FID image. The DREAM sequence can be used to acquire a prepared magnetization [2], thus also an anatomical magnetization prepared (MP) image can be generated, which also suffers from blurring artifacts. To improve the MP-DREAM image quality, we optimized the readout flip angle (FA) train using the end-to-end approach MR-zero [3].