发明名称 |
Gradient coils with reduced eddy currents |
摘要 |
A magnetic resonance imaging apparatus includes a main field magnet (12) for generating a temporally constant magnetic field through an examination region. A radio frequency transmitter (84) excites and manipulates magnetic resonance in selected dipoles in the examination region. A receiver (90) demodulates magnetic resonance signals received from the examination region, a processor (74) reconstructs the demodulated resonance signals into an image representation. A plurality of fingerprint gradient magnetic field coils (24, 26) induce gradient magnetic fields across the temporally constant magnetic field. Each of the fingerprint gradient coils (24, 26) includes a generally spiral winding (32A-32D) having a first crossectional dimension (H) perpendicular to the temporally constant magnetic field which is at least twice a second crossectional dimension (W) in a direction parallel to the temporally constant magnetic field.
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申请公布号 |
US5804968(A) |
申请公布日期 |
1998.09.08 |
申请号 |
US19970790936 |
申请日期 |
1997.01.29 |
申请人 |
PICKER INTERNATIONAL, INC. |
发明人 |
RICHARD, MARK A.;MASTANDREA, JR., NICHOLAS J.;LAMPMAN, DAVID A. |
分类号 |
G01R33/385;(IPC1-7):G01V3/00 |
主分类号 |
G01R33/385 |
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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