Prediction of myocardial signal during CINE balanced SSFP imaging.
Prediction of myocardial signal during CINE balanced SSFP imaging.
复制标题
CINE 平衡 SSFP 成像期间心肌信号的预测。
DOI：
10.1007/s10334-010-0202-2
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
Nayak,KrishnaS
中科院分区：
文献类型：
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作者：
Sung,Kyunghyun;Lee,Hsu-Lei;Hu,HouchunH;Nayak,KrishnaS
目的建立一个信号模型，用于准确预测电影平衡稳态自由进动（bSSFP）imaging.MethodsWe提出了一个信号模型，该模型考虑了非理想切片轮廓，非共振和射频发射变化对心肌信号行为的影响。这三个因素中的每一个都在电影bSSFP心脏成像中常规使用的成像参数的范围内进行了检查，在3 Tesla.ResultsIn五个健康志愿者和广泛的规定翻转角，传统的共振信号模型表现出28.9 ± 3.9%的误差，而建议的模型表现出只有2.9 ± 1.4%的误差，因此更准确的预测心肌信号的行为。切片轮廓的影响被认为是显着的，占大部分的改善。非共振和RF发射不均匀性的影响不太显着，但产生更准确的信号prediction.ConclusionsThe建议的信号模型产生更准确的预测心肌信号相比，现有的模型，可用于脉冲序列和协议的优化。
ObjectTo develop a signal model for accurate prediction of myocardial signal during cine-balanced steady-state free precession (bSSFP) imaging.MethodsWe present a signal model that takes into account the effects of non-ideal slice profile, off-resonance, and radio-frequency transmit variation on myocardial signal behavior. Each of the three factors was examined over the range of imaging parameters routinely used in cine bSSFP cardiac imaging at 3 Tesla.ResultsIn five healthy volunteers and over a wide range of prescribed flip angles, the conventional on-resonance signal model exhibited 28.9 ± 3.9% error, while the proposed model exhibited only 2.9 ± 1.4% error, and therefore more accurate predictions of myocardial signal behavior. Slice profile effects were found to be significant and accounted for most of the improvement. Off-resonance and RF transmit inhomogeneity effects were less significant but did produce more accurate signal prediction.ConclusionsThe proposed signal model produced more accurate predictions of myocardial signal compared to existing models and can be used for the optimization of pulse sequences and protocols.