发明申请
- 专利标题: SYSTEMS AND METHODS FOR SHIM CURRENT CALCULATION
- 专利标题(中): 用于电流计算的系统和方法
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申请号: US13603210申请日: 2012-09-04
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公开(公告)号: US20140062475A1公开(公告)日: 2014-03-06
- 发明人: Kevin Matthew Koch , Eric M. Printz
- 申请人: Kevin Matthew Koch , Eric M. Printz
- 申请人地址: US NY Schenectady
- 专利权人: General Electric Company
- 当前专利权人: General Electric Company
- 当前专利权人地址: US NY Schenectady
- 主分类号: G01R33/56
- IPC分类号: G01R33/56 ; G01R33/341
摘要:
A method includes receiving a forward spatial encoding polarity magnetic resonance (MR) coil image and a reverse spatial encoding polarity MR coil image generated from data obtained with a magnetic field gradient that is reversed with respect to the magnetic field gradient with which the forward spatial encoding polarity MR coil image is acquired. The method also includes performing an iterative shift map calculation algorithm to determine a pixel shift map corresponding to a minimized difference between the forward and reverse spatial encoding polarity MR coil images, converting the pixel shift map into a magnetic field shift map by determining a magnetic field value corresponding to each pixel in the pixel shift map, and providing the magnetic field shift map as an input to a shim calculation process that includes determining a level of at least one shim current.
公开/授权文献
- US09513359B2 Systems and methods for shim current calculation 公开/授权日:2016-12-06