| 摘要 |
Following the polarizing of the magnetic moments in an object using a pulsed field the moment distribution is imaged in the rotating frame by exciting the magnetic moments using a radio-frequency gradient field and a radio-frequency bias field whose phase is cyclically oscillated to prevent the loss of signal due to inhomogeniety. To increase the signal-to-noise ratio coils are used to pick up the signals at quadrature positions. A constant gradient is used for spatial selectivity through saturation.
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