出版社：The Institute of Image Information and Television Engineers
摘要：This paper presents an extension for T1-weighted imaging of the ultra-fast MR imaging method with single-shot and time-unvarying gradient fields. A complete 2-D or 3-D Tr-weighted image can be obtained from two MR images with different inversion acquired by using time-unvarying gradient fields rather than the multiple excitations or the switching gradient fields as used in conventional methods. The principle, the pulse sequence, the strategy of selecting inversion period for producing an inversion recovery of magnetization, the data acquisition procedure, and the reconstruction algorithm are described. Finally, the simulation implemented is introduced. The method has the desirable features of the single-shot technique with time-unvarying gradient fields, including the potential for rapid acquisition, the simplicity of realization, and the elimination of probably harmful influences on patients due to the multiple excitations and the rapidly alternating gradient fields.
