Improved slice-selective adiabatic excitation.
Improved slice-selective adiabatic excitation.
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DOI：
10.1002/mrm.24630
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发表时间：
2014-01
影响因子：
3.3
通讯作者：
Spielman, Daniel
中科院分区：
文献类型：
--
作者：
Balchandani, Priti;Glover, Gary;Pauly, John;Spielman, Daniel
关键词：
The purpose of this work is to design an improved Slice-selective Tunable-flip AdiaBatic Low peak-power Excitation (STABLE) pulse with shorter duration and increased off-resonance immunity to make it suitable for use in a greater range of applications and at higher field strengths. An additional aim is to design a variant of this pulse to achieve B1-insensitive, fat-suppressed excitation. The adiabatic SLR algorithm was used to generate a more uniform spectral pulse envelope for this improved radiofrequency pulse for adiabatic slice-selective excitation, called STABLE-2. Pulse parameters were adjusted to design a version of STABLE-2 with a spectral null centered on lipids. In vivo images obtained of the human brain at 3 and 7 T demonstrate that STABLE-2 provides robust, uniform, slice-selective excitation over a range of B1 values. Phantom and in vivo knee images obtained at 3 T demonstrate the effectiveness of STABLE-2 for fat suppression. STABLE-2 achieves B1-insensitive slice-selective excitation while providing greater off-resonance immunity and a shorter pulse duration, when compared to the original STABLE pulse. In particular, the 9.8-ms STABLE-2 pulse provides slice selectivity over 120 Hz whereas the 21-ms STABLE pulse is limited to 80 Hz off-resonance. B1-Insensitive fat-suppressed excitation may also be achieved by using a variant of this pulse.
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影响因子：
3.3
作者：
Setsompop, Kawin;Alagappan, Vijayanand;Gagoski, Borjan;Witzel, Thomas;Polimeni, Jonathan;Potthast, Andreas;Hebrank, Franz;Fontius, Ulrich;Schmitt, Franz;Wald, Lawrence L.;Adalsteinsson, Elfar
通讯作者：
Adalsteinsson, Elfar
影响因子：
3.3
作者：
MEYER, CH;PAULY, JM;NISHIMURA, DG
通讯作者：
NISHIMURA, DG
影响因子：
2.2
作者：
CONOLLY, S;NISHIMURA, D;GLOVER, G
通讯作者：
GLOVER, G
影响因子：
3.3
作者：
Grissom, William;Yip, Chun-yu;Noll, Douglas C.
通讯作者：
Noll, Douglas C.
影响因子：
3.3
作者：
Balchandani, Priti;Spielman, Daniel
通讯作者：
Spielman, Daniel