Z intensity-weighted position self-respiratory gating method for free-breathing 3D cardiac CINE imaging.

Z intensity-weighted position self-respiratory gating method for free-breathing 3D cardiac CINE imaging.
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DOI:
10.1016/j.mri.2011.02.011
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发表时间:
2011-07
影响因子:
2.5
通讯作者:
Wang, Yi
Wang, Yi
中科院分区:
医学4区
文献类型:
--
作者:
spincemaille, Pascal;Liu, Jing;Thanh Nguyen;Prince, Martin R.;Wang, Yi

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自由呼吸3D电影SSFP技术是使用Z强度加权位置(ZIP)作为呼吸门控信号开发的,Z强度加权位置是沿着切片方向的投影的质心。在每个TR中使用切片编码的k空间中心采样连续采集ZIP信号。在健康受试者中,通过测量图像质量和左心室功能,将这种门控方法的性能与使用k空间中心信号(KC)的方法和传统的2D屏气电影SSFP进行比较。此处获得的初步数据表明,与KC门控相比,ZIP门控方法提供了上级呼吸运动伪影抑制,并提供了与屏气2D电影SSFP采集相似的左心室射血分数、舒张末期和收缩末期容积。
A free-breathing 3D cine SSFP technique was developed using the Z Intensity weighted Position (ZIP) which is the center of mass of a projection along the slice direction as a respiratory gating signal. The ZIP signal was continuously acquired using a slice encoded k-space center sampling in every TR. The performance of this gating method was compared with a method using the k-space center signal (KC) and with conventional 2D breath-hold cine SSFP in healthy subjects by measuring image quality and left-ventricular function. The preliminary data obtained here demonstrated that the ZIP gating method provided superior respiratory motion artifact suppression when compared to the KC gating and provided left-ventricular ejection fractions, end-diastolic and end-systolic volumes similar to those obtained with the breath-hold 2D cine SSFP acquisition.
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