Inverse dispersion filter for dynamic range compression in MR

摘要

A radio frequency (RF) device for receiving or pumping a magnetic resonance (MR) signalMr Coyle 22 tuned to Mr frequency band32 andAt least partially tuned digital signal processing chain 40 to operate on baseband445870 andAt least partially tuned analog signal processing chain 48 to be operatively connected to Mr Coyle and operate in the MR frequency band505460 andAn analog / digital (A / D) or digital / analog (D / a) converter 46 that connects the digital signal processing chain to the analog signal processing chain56 and.The analog signal processing chain includes analog distributed delay lines 50, 60 adjusted to impose a frequency dependent signal delay 52, 62 monotonically increasing or monotonically over the MR frequency band.In a more specific embodiment, the RF device may have Mr transmission chain 20 or Mr receive chain 30.