Design and analysis of a practical 3D cones trajectory
Design and analysis of a practical 3D cones trajectory
复制标题
DOI：
10.1002/mrm.20796
复制
发表时间：
2006-03-01
影响因子：
3.3
通讯作者：
Nishimura, DG
中科院分区：
文献类型：
--
作者：
Gurney, PT;Hargreaves, BA;Nishimura, DG
3D锥k空间轨迹对于快速和超短回波时间磁共振成像具有许多期望的性质。给出了一种算法，该算法在给定所需视场和分辨率的情况下生成313个锥形梯度波形。该算法能够在读出时间的增加和所需读出的总数的减少之间实现有利的权衡。所得到的轨迹是非常有效的信号噪声比（SNR），并具有良好的混叠性能。一个快速的高分辨率超短回波时间成像序列被用来比较三维锥轨迹的三维投影重建（3DPR）采样方案。对于相同的扫描时间，与3DPR轨迹相比，3D圆锥轨迹具有更好的SNR性能和更少的混叠伪影。
The 3D Cones k-space trajectory has many desirable properties for rapid and ultra-short echo time magnetic resonance imaging. An algorithm is presented that generates the 313 Cones gradient waveforms given a desired field of view and resolution. The algorithm enables a favorable trade-off between increases in readout time and decreases in the total number of required readouts. The resulting trajectory is very signal-to-noise ratio (SNR) efficient and has excellent aliasing properties. A rapid high-resolution ultra-short echo time imaging sequence is used to compare the 3D Cones trajectory to 3D projection reconstruction (3DPR) sampling schemes. For equivalent scan times, the 3D Cones trajectory has better SNR performance and fewer aliasing artifacts as compared to the 3DPR trajectory.