Effects of refocusing flip angle modulation and view ordering in 3D fast spin echo.
Effects of refocusing flip angle modulation and view ordering in 3D fast spin echo.
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DOI:
10.1002/mrm.21680
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发表时间:
2008-09
影响因子:
3.3
通讯作者:
Rowley, Howard A.
中科院分区:
文献类型:
--
作者:
Busse, Reed F.;Brau, Anja C. S.;Vu, Anthony;Michelich, Charles R.;Bayram, Ersin;Kijowski, Richard;Reeder, Scott B.;Rowley, Howard A.
Recent advances have reduced scan time in three-dimensional fast spin echo (3D-FSE) imaging, including very long echo trains through refocusing flip angle (FA) modulation and 2D-accelerated parallel imaging. This work describes a method to modulate refocusing FAs that produces sharp point spread functions (PSFs) from very long echo trains while exercising direct control over minimum, center-k-space, and maximum FAs in order to accommodate the presence of flow and motion, SNR requirements, and RF power limits. Additionally, a new method for ordering views to map signal modulation from the echo train into ky-kz space that enables nonrectangular k-space grids and autocalibrating 2D-accelerated parallel imaging is presented. With long echo trains and fewer echoes required to encode large matrices, large volumes with high in- and through-plane resolution matrices may be acquired with scan times of 3–6 min, as demonstrated for volumetric brain, knee, and kidney imaging.
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影响因子:
3.3
作者:
Alsop, DC
通讯作者:
Alsop, DC
影响因子:
3.3
作者:
Hennig, J;Weigel, M;Scheffler, K
通讯作者:
Scheffler, K
影响因子:
3.3
作者:
NORRIS, DG;BORNERT, P;LEIBFRITZ, D
通讯作者:
LEIBFRITZ, D
影响因子:
3.3
作者:
Wang, Ze;Fernandez-Seara, Maria A.
通讯作者:
Fernandez-Seara, Maria A.
DOI:
10.1002/jmri.1880030617
发表时间:
1993-11-01
期刊:
JMRI-JOURNAL OF MAGNETIC RESONANCE IMAGING
影响因子:
--
作者:
YUAN, C;SCHMIEDL, UP;RAND, SD
通讯作者:
RAND, SD