NDLI: TROMBONE:T1-relaxation-oblivious mapping of transmit radio-frequency field (B1) for MRI at high magnetic fields

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TROMBONE:T1-relaxation-oblivious mapping of transmit radio-frequency field (B1) for MRI at high magnetic fields

Content Provider	Scilit
Author	Fleysher, Roman Fleysher, Lazar Inglese, Matilde Sodickson, Daniel
Copyright Year	2011
Description	Journal: Magnetic Resonance in Medicine Fast, 3D radio-frequency transmit field (B1) mapping is important for parallel transmission, spatially selective pulse design and quantitative MRI applications. It has been shown that actual flip angle imaging--two interleaved spoiled gradient recalled echo images acquired in steady state with two very short time delays (TR1, TR2)--is an attractive method of B1 mapping. Herein, we describe the TROMBONE method that efficiently integrates actual flip angle imaging with EPI imaging, alleviates very short TR requirement of actual flip angle imaging and through their synergy yields up to 16 times higher precision in B1 estimation in the same experimental time. High precision of TROMBONE can be traded for faster scans. The map of B1 reconstructed from the ratio of intensities of two images is insensitive to longitudinal relaxation time (T1) in the physiologically relevant range. A table of the optimal acquisition protocol parameters for various target experimental conditions is provided.
Related Links	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3130840/pdf
Ending Page	491
Page Count	9
Starting Page	483
e-ISSN	15222594
DOI	10.1002/mrm.22804
Journal	Magnetic Resonance in Medicine
Issue Number	2
Volume Number	66
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2011-03-09
Access Restriction	Open
Subject Keyword	Journal: Magnetic Resonance in Medicine Radiology, Nuclear Medicine and Imaging B1 Mapping Fast Volumetric Imaging High-field Mri Quantitative Mri Rf Inhomogeneity Optimization Methods Parallel Transmission Actual Flip Angle Imaging
Content Type	Text
Resource Type	Article

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TROMBONE: T1-Relaxation-Oblivious Mapping of Transmit Radio-Frequency Field (B1) for MRI at High Magnetic Fields

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TROMBONE:T1-relaxation-oblivious mapping of transmit radio-frequency field (B1) for MRI at high magnetic fields

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TROMBONE: T1-Relaxation-Oblivious Mapping of Transmit Radio-Frequency Field (B1) for MRI at High Magnetic Fields

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TROMBONE:T1-relaxation-oblivious mapping of transmit radio-frequency field (B1) for MRI at high magnetic fields