首页>
外国专利>
Fast NMR imaging method and apparatus for using a multi-dimensional reconstruction techniques
Fast NMR imaging method and apparatus for using a multi-dimensional reconstruction techniques
展开▼
机译:使用多维重建技术的快速核磁共振成像方法和装置
展开▼
页面导航
摘要
著录项
相似文献
摘要
Densities of resonant nuclei within elemental volumes along a line are measured using the nuclear magnetic resonance phenomenon called "spin echo." A first planar volume of nuclei is selectively excited to nutate spins by approximately 90°. Thereafter a second planar volume of nuclei, transverse to the first planar volume, is selectively excited to nutate spins by approximately 180°. The nuclei in the line volume common to both of the planar volumes thereafter generate characteristic spin echo signals. A magnetic gradient is established along this line volume during the spin echo read out so that the resultant spin echo signals can be processed to determine the respective densities of resonant nuclei along the line volume. Special pulsing sequences for rapidly effecting measurement of successive multiple line volumes and suitable apparatus for effecting such sequences are also described.
展开▼