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MR involving high speed coil mode switching between I-channel linear, Q-channel linear, quadrature and anti-quadrature modes
MR involving high speed coil mode switching between I-channel linear, Q-channel linear, quadrature and anti-quadrature modes
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机译:MR涉及在I通道线性,Q通道线性,正交和反正交模式之间进行高速线圈模式切换
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摘要
Hybrid circuitry (40, 40′, 40″) for operatively coupling a radio frequency drive signal (70) with a quadrature coil (30) is configurable in one of at least two coil modes of a group consisting of: (i) a linear I channel mode in which an I channel input port (42) is driven without driving a Q channel input port (44); (ii) a linear Q channel mode in which the Q channel input port is driven without driving the I channel input port; (iii) a quadrature mode in which both the I and Q channel input ports are driven with a selected positive phase difference; and (iv) an anti quadrature mode in which both the I and Q channel input ports are driven with a selected negative phase difference. A temporal sequence of the at least two coil modes may be determined and employed to compensate for B1 inhomogeneity.
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