Comments on "gradient-induced acoustic and magnetic field fluctuations in a 4T whole-body MR imager".
The results published in the article Gradient-Induced Acoustic and Magnetic Field Fluctuations in a 4T Whole-Body MR Imager by Wu et al. (Magn Reson Med 2000;44:532-536) appear to be consistent with the response of a time-stationary linear system. Since a linear system is more simply described than a nonlinear system, the authors are urged to reanalyze their data to test the linear-system hypothesis.
Barnett
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D000162:Acoustics; D004574:Electromagnetic Fields; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D008433:Mathematics; D009622:Noise