Halving imaging time of whole brain diffusion spectrum imaging and diffusion tractography using simultaneous image refocusing in EPI.
Halving imaging time of whole brain diffusion spectrum imaging and diffusion tractography using simultaneous image refocusing in EPI.
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DOI:
10.1002/jmri.21497
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发表时间:
2009-03
影响因子:
4.4
通讯作者:
Wedeen, Van J.
中科院分区:
文献类型:
--
作者:
Reese, Timothy G.;Benner, Thomas;Wang, Ruopeng;Feinberg, David A.;Wedeen, Van J.
To increase the efficiency of densely encoded diffusion imaging of the brain, such as diffusion spectrum imaging (DSI), we time-multiplex multiple slices within the same readout using simultaneous image refocusing echo planar imaging (SIR-EPI). Inefficiency in total scan time results from the long time of diffusion encoding gradient pulses which must be repeated for each and every image. We present a highly efficient multiplexing method, simultaneous image refocusing (SIR) for reducing the total scan time of diffusion imaging by nearly one-half. SIR DSI is performed in 10 minutes rather than 21 minutes, acceptable for routine clinical application. Two identical studies were completed, comparing conventional single-slice echo-planar (EPI) DSI and simultaneous image refocusing (SIR-EPI) DSI, showing equal SNR and contrast and small differences in registration, likely due to typical subject motion. Comparison of DSI and DTI tractographs showed matching quality and detection of white matter tracts. The net reduction to nearly half the number of diffusion encoding gradient pulses in SIR-EPI significantly reduces acquisition times of DSI and DTI.
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DOI:
10.1006/jmrb.1994.1037
发表时间:
1994-03-01
期刊:
JOURNAL OF MAGNETIC RESONANCE SERIES B
影响因子:
--
作者:
BASSER, PJ;MATTIELLO, J;LEBIHAN, D
通讯作者:
LEBIHAN, D
影响因子:
3.3
作者:
Griswold, MA;Jakob, PM;Haase, A
通讯作者:
Haase, A
影响因子:
3.3
作者:
Reese, TG;Heid, O;Wedeen, VJ
通讯作者:
Wedeen, VJ
影响因子:
3.3
作者:
Feinberg, DA;Reese, TG;Wedeen, VJ
通讯作者:
Wedeen, VJ
影响因子:
3.3
作者:
FEINBERG, DA;JAKAB, PD
通讯作者:
JAKAB, PD