Reduction of artifacts in susceptibility-weighted MR venography of the brain.
Reduction of artifacts in susceptibility-weighted MR venography of the brain.
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DOI:
10.1002/jmri.21447
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发表时间:
2008-08
影响因子:
4.4
通讯作者:
Du, Yiping P.
中科院分区:
文献类型:
--
作者:
Jin, Zhaoyang;Xia, Ling;Du, Yiping P.
关键词:
To reduce the off-resonance artifact in susceptibility weighted imaging (SWI)-based MR venography (MRV) in the brain regions with severe field inhomogeneity and to reduce the signal loss in the minimum-intensity projection (mIP) display of the 3D MRV. A novel post-processing approach was presented to map the local field gradients (LFGs) using the 3D SWI data without phase-unwrapping. LFG measurements were used to assess the severity of field inhomogeneity and suppress the residual phase in the phase mask induced by the off-resonance effect. Volume segmentation of brain tissue was used to reduce the signal loss in the peripheral regions of the brain in the through-plane mIP images and enable in-plane mIP display of MRV. Off-resonance artifact in the brain regions with severe field inhomogeneity was effectively reduced by the LFG-based phase suppression approach. Signal loss was reduced in the through-plane mIP of MRV using volume segmentation of brain tissue prior to projection. In-plane mIP of MRV also became feasible with volume segmentation. Off-resonance artifacts and signal loss in mIP display of MRV can be effectively reduced through post-processing.
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影响因子:
4.4
作者:
Rauscher, A;Barth, M;Moser, E
通讯作者:
Moser, E
影响因子:
2.5
作者:
Essig, M;Reichenbach, JR;Kaiser, WA
通讯作者:
Kaiser, WA
影响因子:
19.7
作者:
Reichenbach, JR;Venkatesan, R;Haacke, EM
通讯作者:
Haacke, EM
DOI:
10.1016/s1352-8661(98)00011-8
发表时间:
1998-08-01
影响因子:
2.3
作者:
Reichenbach, Juergen R. .;Essig, Marco;Schad, Lothar R.
通讯作者:
Schad, Lothar R.
影响因子:
2.5
作者:
Xu, YB;Haacke, EM
通讯作者:
Haacke, EM