Hou P, Parker D L, Blatter D D, Robison R O
Department of Physics, LDS Hospital/University of Utah, Salt Lake City 84143.
Magn Reson Med. 1991 May;19(1):203-8. doi: 10.1002/mrm.1910190121.
Fourier velocity imaging can be accomplished without cardiac gating from the second echo of a standard 3D MR angiography sequence. The stepped bipolar velocity encoding gradient is obtained by adding a gradient pulse opposite in area to the spatial phase encoding gradient. In this technique, Fourier images of three spatial coordinates are obtained from the first echo and images of two spatial coordinates and one velocity component are obtained from the second echo.
傅里叶速度成像可以在不使用心脏门控的情况下，从标准三维磁共振血管造影序列的第二个回波中完成。通过添加一个面积与空间相位编码梯度相反的梯度脉冲来获得阶梯状双极速度编码梯度。在这项技术中，从第一个回波中获取三个空间坐标的傅里叶图像，从第二个回波中获取两个空间坐标和一个速度分量的图像。
