发明授权
US5502385A Method of forming a series of MR images, and device for carrying out the
method
失效
形成一系列MR图像的方法,以及用于执行该方法的装置
- 专利标题: Method of forming a series of MR images, and device for carrying out the method
- 专利标题(中): 形成一系列MR图像的方法,以及用于执行该方法的装置
-
申请号: US255510申请日: 1994-06-08
-
公开(公告)号: US5502385A公开(公告)日: 1996-03-26
- 发明人: Michael H. Kuhn , Volker Rasche , Roland Proksa
- 申请人: Michael H. Kuhn , Volker Rasche , Roland Proksa
- 申请人地址: NY New York
- 专利权人: U.S. Philips Corporation
- 当前专利权人: U.S. Philips Corporation
- 当前专利权人地址: NY New York
- 优先权: DEX4319539.3 19930612
- 主分类号: A61B5/055
- IPC分类号: A61B5/055 ; G01R33/48 ; G01R33/561 ; G01R33/563 ; G01V3/14
摘要:
The invention relates to a method of forming a series of MR images in which, in the presence of a steady magnetic field, sequences comprising at least an RF pulse and a magnetic gradient field which is varied from one sequence to another are continuously applied to the examination zone, from the image signals thus generated there being reconstructed MR images, the oldest MR signals used for the reconstruction of an MR image being replaced upon reconstruction of the next MR image by the respective newly generated MR signals. Low-artefact reproduction of dynamic processes in the examination zone can be achieved by varying the direction of the magnetic gradient field active during the generation of an MR signal from one sequence to another so that the range of the magnetic gradient field directions required for the reconstruction is distributed between the respective newly generated MR signals. The invention also relates to a device for carrying out this method.