Börnert P, Schäffter T
Philips Research, Department Technical Systems, Hamburg, Germany.
Magn Reson Med. 1996 Dec;36(6):932-9. doi: 10.1002/mrm.1910360616.
Curved slice imaging based on multidimensional RF pulses is introduced and discussed. This new approach makes it possible to image curved anatomical structures by using MRI. The 2D RF or 3D RF pulses used can be tailored to excite or refocus transverse magnetization of a previously defined arbitrarily curved slice profile in a 3D space. These RF pulses can be integrated into all standard MRI sequences to perform slice selection. The final curved slice image is obtained as a projection of the curved slice magnetization onto a selected imaging plane. The problem of ambiguities arising due to this projection process is addressed. Phantom and in vivo experiments were performed to illustrate the advantages and limitations of this approach.
介绍并讨论了基于多维射频脉冲的曲面切片成像。这种新方法使得利用磁共振成像（MRI）对弯曲的解剖结构进行成像成为可能。所使用的二维射频或三维射频脉冲可以进行定制，以激发或重新聚焦三维空间中预先定义的任意弯曲切片轮廓的横向磁化。这些射频脉冲可以集成到所有标准MRI序列中以执行切片选择。最终的曲面切片图像是通过将曲面切片磁化投影到选定的成像平面上获得的。解决了由于这种投影过程而产生的模糊性问题。进行了体模和体内实验以说明这种方法的优点和局限性。
