Simultaneous 3D T1 and B1+ mapping at 7T using MPRAGE with multiple volumes and driven equilibrium (DE)

Hampus Olsson, Mads Andersen, Mustafa Kadhim, Gunther Helms

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

Abstract

MP2RAGE has become popular for T1 mapping at 7T. Accuracy is yet improved by using a separately acquired flip angle map when creating the protocol-specific lookup table. Here, two additional volumes acquired at differing flip angles are added to an MP2RAGE sequence to obtain two separate states of driven equilibriums, effectively forming a dual flip angle protocol within the cycle. By estimating the accelerated effective relaxation, T1* from the signals, both T1 and B1+ can be solved for analytically. Thus, a multi-volume MPRAGE sequence is turned into a dedicated high-resolution T1 and flip angle-mapping protocol.
Original languageEnglish
Title of host publicationProceedings of the 2021 ISMRM & ISMRT Annual Meeting and Exhibition
Place of PublicationConcord, CA
PublisherInternational Society for Magnetic Resonance in Medicine
Volume29
Publication statusPublished - 2021 Apr 30
EventISMRM and SMRT Annual Meeting and Exhibition 2021 - virtual
Duration: 2021 May 152021 May 20

Publication series

NameProc Intl Soc Magn Reson Med
PublisherIntl. Society for Magnetic Resonance in Medicine (ISMRM)
Volume29
ISSN (Electronic)1545-4428

Conference

ConferenceISMRM and SMRT Annual Meeting and Exhibition 2021
Period2021/05/152021/05/20

Subject classification (UKÄ)

  • Radiology, Nuclear Medicine and Medical Imaging

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