发明授权
US08148982B2 Spin locked balanced steady-state free precession (slSSFP) with off-resonance spin locked pulses interleaved with imaging gradients
有权
旋转锁定平衡稳态自由进动（slSSFP），具有与成像梯度交错的非共振自旋锁定脉冲
- 专利标题： Spin locked balanced steady-state free precession (slSSFP) with off-resonance spin locked pulses interleaved with imaging gradients
- 专利标题（中）： 旋转锁定平衡稳态自由进动（slSSFP），具有与成像梯度交错的非共振自旋锁定脉冲
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申请号： US12426703申请日： 2009-04-20
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公开(公告)号： US08148982B2公开(公告)日： 2012-04-03
- 发明人: Walter R. T. Witschey , Mark A. Elliott , Ari Borthakur , Ravinder Reddy
- 申请人： Walter R. T. Witschey , Mark A. Elliott , Ari Borthakur , Ravinder Reddy
- 申请人地址： US PA Philadelphia
- 专利权人： The Trustees Of The University Of Pennsylvania
- 当前专利权人： The Trustees Of The University Of Pennsylvania
- 当前专利权人地址： US PA Philadelphia
- 代理机构： Woodcock Washburn, LLP
- 主分类号： G01V3/00
- IPC分类号： G01V3/00
摘要：
A spin locked balanced steady-state free precession (slSSFP) pulse sequence combines a balanced gradient echo acquisition with an off-resonance spin lock pulse for fast MRI. The transient and steady-state magnetization trajectory is solved numerically using the Bloch equations and is shown to be similar to balanced steady-state free precession (bSSFP) for a range of T2/T1 and flip angles, although the slSSFP steady-state could be maintained with considerably lower RF power. In both simulations and brain scans performed at 7T, slSSFP is shown to exhibit similar contrast and SNR efficiency to bSSFP, but with significantly lower power.
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