| 摘要 |
An improved transient interference detector and suppressor for an MRI system detects the presence of transient interference in an MRI signal by detecting the envelope of the MRI signal and comparing the rate of change of the envelope to a reference signal. When the rate of change of the envelope exceeds the reference signal, a transient interference detection is made and appropriate action may be taken. When the rate of change of the envelope is less than the reference signal, no transient interference detection is made. The reference signal is set at a level slightly above a level corresponding to the average thermal noise in order to substantially prevent the minor, random fluctuations in the thermal noise from falsely triggering the detection of a transient interference event.
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