发明名称 |
Method and apparatus for producing diffusion weighted MR images |
摘要 |
A technique is provided for generating images on an MRI system in which errors due to gradient pulses are compensated. The errors are identified in advance, such as in a calibration sequence performed on the MRI system. Receiver phase adjustment and logical gradient error values are derived from the identified error values. The calibration sequence may be a modified version of the MRI imaging sequence used to produce the images. The correction values may be based upon corrections at the center of k-space. The technique is particularly useful in compensating for effects of eddy currents in pulse sequences employing high slew rate gradient pulses, such as diffusion weighted echo planar imaging sequences.
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申请公布号 |
US6323646(B1) |
申请公布日期 |
2001.11.27 |
申请号 |
US19990316230 |
申请日期 |
1999.05.21 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
ZHOU XIAOHONG;MAIER JOSEPH K.;HUFF STEVEN J.;REYNOLDS HAMMOND GLENN |
分类号 |
G01R33/563;(IPC1-7):G01V3/00 |
主分类号 |
G01R33/563 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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