Motion and flow insensitive adiabatic T2 -preparation module for cardiac MR imaging at 3 Tesla.
Motion and flow insensitive adiabatic T2 -preparation module for cardiac MR imaging at 3 Tesla.
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DOI:
10.1002/mrm.24564
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发表时间:
2013-11
影响因子:
3.3
通讯作者:
Kim RJ
中科院分区:
文献类型:
--
作者:
Jenista ER;Rehwald WG;Chen EL;Kim HW;Klem I;Parker MA;Kim RJ
A versatile method for generating T2-weighting is a T2-preparation (T2-prep) module, which has been used successfully for cardiac imaging at 1.5T. Although it has been applied at 3T, higher fields (B0 ≥ 3T) can degrade B0 and B1 homogeneity and result in non-uniform magnetization preparation. For cardiac imaging, blood flow and cardiac motion may further impair magnetization preparation. In this study, a novel T2-prep module containing multiple adiabatic B1-insensitive refocusing (BIREF-1) pulses is introduced and compared with three previously described modules (a: composite MLEV4, b: modified BIR-4 (mBIR-4), and c: Silver-Hoult–pair). In the static phantom, the proposed module provided similar or better B0 and B1 insensitivity than the other modules. In human subjects (n=21), quantitative measurement of image signal coefficient of variation (CV), reflecting overall image inhomogeneity, was lower for the proposed module (0.10) than for MLEV4 (0.15, p<0.0001), mBIR-4 (0.27, p<0.0001), and Silver-Hoult–pair (0.14, p=0.001) modules. Similarly, qualitative analysis revealed that the proposed module had the best image quality scores and ranking (both, p<0.0001). In conclusion, we present a new T2-preparation module, which is shown to be robust for cardiac imaging at 3T in comparison with existing methods.
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影响因子:
2.2
作者:
HARDY, CJ;EDELSTEIN, WA;VATIS, D
通讯作者:
VATIS, D
影响因子:
3.3
作者:
Nezafat, R;Stuber, M;Pettigrew, RI
通讯作者:
Pettigrew, RI
影响因子:
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Nezafat, Reza;Ouwerkerk, Ronald;McVeigh, Elliot R.
通讯作者:
McVeigh, Elliot R.
影响因子:
3.3
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CONOLLY, S;GLOVER, G;MACOVSKI, A
通讯作者:
MACOVSKI, A
影响因子:
3.3
作者:
BRITTAIN, JH;HU, BS;NISHIMURA, DG
通讯作者:
NISHIMURA, DG