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-  2015 

改进的磁共振回顾式呼吸导航门控技术

DOI: doi:10.7507/1001-5515.20150233

Keywords: 磁共振成像, 运动伪影, 呼吸导航门控, 变过采集率, 加权平均

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Abstract:

腹部成像是磁共振成像(MRI)的一个重要应用领域, 但呼吸运动导致的伪影依然是其面临的主要问题。回顾式呼吸导航门控技术可以有效地抑制呼吸运动伪影, 然而过长的扫描时间和很低的信噪比效率严重制约了这种技术的临床应用。本文提出了一种改进的回顾式呼吸导航数据采集和重建方法, 该方法采用了变过采集率的数据采集方法和加权平均的重建算法。水模和7名志愿者的成像结果表明, 相同的扫描时间, 改进方法和传统方法相比, 可以有效提高图像的信噪比以及减少图像伪影。该方法也可在不影响图像质量的前提下减少扫描时间

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