发明授权
US06424152B1 Method to reduce artefacts in the magnetic resonance image due to spurious magnetic signals
失效
减少由于杂散磁信号引起的磁共振图像中的伪像的方法
- 专利标题: Method to reduce artefacts in the magnetic resonance image due to spurious magnetic signals
- 专利标题(中): 减少由于杂散磁信号引起的磁共振图像中的伪像的方法
-
申请号: US09486993申请日: 2000-03-01
-
公开(公告)号: US06424152B1公开(公告)日: 2002-07-23
- 发明人: Willem M. Prins , Gerardus N. Peeren
- 申请人: Willem M. Prins , Gerardus N. Peeren
- 优先权: EP98202211 19980702
- 主分类号: G01V300
- IPC分类号: G01V300
摘要:
A magnetic resonance imaging facilitates a pre-compensating phase encoding of spuriously generated magnetizations. The method includes generating a preparatory excitation of spins represented upon an RF-excitation line, applying subsequently a temporary magnetic compensation gradient as represented along a phase-encoding axis, generating subsequently an RF excitation pulse as represented upon the RF-excitation line, applying subsequent to the RF excitation pulse, and before an acquisition interval for receiving magnetic resonance signals, a phase-encoding gradient as represented along the phase-encoding axis. The phase-encoding gradient is substantially the same magnitude as, and opposite in direction relative to, the direction of the temporary magnetic compensation gradient. The last step includes receiving magnetic resonance signals during the acquisition interval as represented along the RF-excitation line.
信息查询