Respiratory and cardiac self-gated free-breathing cardiac CINE imaging with multiecho 3D hybrid radial SSFP acquisition.
Respiratory and cardiac self-gated free-breathing cardiac CINE imaging with multiecho 3D hybrid radial SSFP acquisition.
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DOI：
10.1002/mrm.22306
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发表时间：
2010-05
影响因子：
3.3
通讯作者：
Wang, Yi
中科院分区：
文献类型：
--
作者：
Liu, Jing;Spincemaille, Pascal;Codella, Noel C. F.;Nguyen, Thanh D.;Prince, Martin R.;Wang, Yi
提出了一种基于多回波混合径向采样的呼吸和心脏自主门控自由呼吸三维电影SSFP成像方法。k空间中心沿着切片编码方向的笛卡尔映射提供了强度加权的位置信息，从该信息导出呼吸和心脏运动。通过每个TR在平面中进行径向采样，不需要额外的扫描时间来对k空间中心进行采样。径向重建采用基于密度补偿的时域滤波，以获得较高的信噪比和干噪比。证明了自选通信号和外部选通信号之间的高度相关性。这种呼吸和心脏自主门控自由呼吸3D放射状心脏电影成像技术在短轴、四腔和两腔方向上提供的图像质量与使用多次屏气2D笛卡尔SSFP技术获得的图像质量相当。发现3D心脏短轴电影图像的功能测量结果与使用标准2D技术获得的功能测量结果相当。
A respiratory and cardiac self-gated free-breathing 3D cine SSFP imaging method using multi-echo hybrid radial sampling is presented. Cartesian mapping of the k-space center along the slice encoding direction provides intensity-weighted position information, from which both respiratory and cardiac motions are derived. With radial sampling in plane every TR, no extra scan time is required for sampling the k-space center. Temporal filtering based on density compensation is used for radial reconstruction to achieve high SNR and CNR. High correlation between the self-gating signals and external gating signals is demonstrated. This respiratory and cardiac self-gated free-breathing 3D radial cardiac cine imaging technique provides image quality comparable to that acquired with the multiple breath-hold 2D Cartesian SSFP technique in short axis, four chamber and two chamber orientations. Functional measurements from the 3D cardiac short axis cine images are found to be comparable to those obtained using the standard 2D technique.
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