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  RARE/turbo spin echo imaging with simultaneous multislice Wave-CAIPI

Gagoski, B. A., Bilgic, B., Eichner, C., Bhat, H., Grant, P. E., Wald, L. L., et al. (2015). RARE/turbo spin echo imaging with simultaneous multislice Wave-CAIPI. Magnetic Resonance in Medicine, 73(3), 929-938. doi:10.1002/mrm.25615.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0024-E5FC-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0003-B0A6-A
Genre: Journal Article

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 Creators:
Gagoski, Borja A.1, 2, Author
Bilgic, Berkin2, 3, Author
Eichner, Cornelius4, Author              
Bhat, Himanshu5, Author
Grant, P. Ellen1, 2, Author
Wald, Lawrence L.2, 3, 6, Author
Setsompop, Kawim2, 3, Author
Affiliations:
1Fetal-Neonatal Neuroimaging and Developmental Science Center, Boston Children's Hospital, MA, USA, ou_persistent22              
2Department of Radiology, Harvard Medical School, Boston, MA, USA, ou_persistent22              
3Athinoula A. Martinos Center for Biomedical Imaging, Charlestown, MA, USA, ou_persistent22              
4Department Neurophysics, MPI for Human Cognitive and Brain Sciences, Max Planck Society, ou_persistent22              
5Siemens Medical Solutions USA Inc., Charlestown, MA, USA, ou_persistent22              
6Harvard-MIT Health Sciences and Technology, Cambridge, MA, USA, ou_persistent22              

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Free keywords: Simultaneous multislice; Multiband; Wave-CAIPI; MultiPINS; CAIPIRINHA; RARE/TSE/FSE
 Abstract: PURPOSE: To enable highly accelerated RARE/Turbo Spin Echo (TSE) imaging using Simultaneous MultiSlice (SMS) Wave-CAIPI acquisition with reduced g-factor penalty. METHODS: SMS Wave-CAIPI incurs slice shifts across simultaneously excited slices while playing sinusoidal gradient waveforms during the readout of each encoding line. This results in an efficient k-space coverage that spreads aliasing in all three dimensions to fully harness the encoding power of coil sensitivities. The novel MultiPINS radiofrequency (RF) pulses dramatically reduce the power deposition of multiband (MB) refocusing pulse, thus allowing high MB factors within the Specific Absorption Rate (SAR) limit. RESULTS: Wave-CAIPI acquisition with MultiPINS permits whole brain coverage with 1 mm isotropic resolution in 70 s at effective MB factor 13, with maximum and average g-factor penalties of gmax  = 1.34 and gavg  = 1.12, and without √R penalty. With blipped-CAIPI, the g-factor performance was degraded to gmax  = 3.24 and gavg  = 1.42; a 2.4-fold increase in gmax relative to Wave-CAIPI. At this MB factor, the SAR of the MultiBand and PINS pulses are 4.2 and 1.9 times that of the MultiPINS pulse, while the peak RF power are 19.4 and 3.9 times higher. CONCLUSION: Combination of the two technologies, Wave-CAIPI and MultiPINS pulse, enables highly accelerated RARE/TSE imaging with low SNR penalty at reduced SAR.

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Language(s): eng - English
 Dates: 2014-10-102014-09-222015-02-022015-03
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: Peer
 Identifiers: DOI: 10.1002/mrm.25615
PMID: 25640187
PMC: PMC4334698
Other: Epub 2015
 Degree: -

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Title: Magnetic Resonance in Medicine
Source Genre: Journal
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Pages: - Volume / Issue: 73 (3) Sequence Number: - Start / End Page: 929 - 938 Identifier: ISSN: 0740-3194
CoNE: https://pure.mpg.de/cone/journals/resource/954925538149