Name
Title | ||
|---|---|---|
An Efficient Feedback Active Noise Control Algorithm Based on Reduced-Order Linear Predictive Modeling of fMRI Acoustic Noise |
Abstract | ||
|---|---|---|
Functional magnetic resonance imaging (fMRI) acoustic noise exhibits an almost periodic nature (quasi-periodicity) due to the repetitive nature of currents in the gradient coils. Small changes occur in the waveform in consecutive periods due to the background noise and slow drifts in the electroacoustic transfer functions that map the gradient coil waveforms to the measured acoustic waveforms. The period depends on the number of slices per second, when echo planar imaging (EPI) sequencing is used. Linear predictability of fMRI acoustic noise has a direct effect on the performance of active noise control (ANC) systems targeted to cancel the acoustic noise. It is shown that by incorporating some samples from the previous period, very high linear prediction accuracy can be reached with a very low order predictor. This has direct implications on feedback ANC systems since their performance is governed by the predictability of the acoustic noise to be cancelled. The low complexity linear prediction of fMRI acoustic noise developed in this paper is used to derive an effective and low-cost feedback ANC system. |
Year | DOI | Venue |
|---|---|---|
2011 | 10.1109/TBME.2010.2096423 | Biomedical Engineering, IEEE Transactions |
Keywords | Field | DocType |
active noise control,biomedical MRI,feedback,linear predictive coding,medical signal processing,ANC system performance,EPI sequencing,background noise,echo planar imaging,electroacoustic transfer function drifts,fMRI acoustic noise,feedback ANC systems,feedback active noise control algorithm,functional magnetic resonance imaging,gradient coil currents,gradient coil waveforms,linear prediction accuracy,quasiperiodicity,reduced order linear predictive modeling,Active noise reduction,acoustic noise,magnetic resonance imaging | Noise,Background noise,Noise floor,Noise measurement,Computer science,Waveform,Electronic engineering,Linear prediction,Transfer function,Acoustics,Active noise control | Journal |
Volume | Issue | ISSN |
58 | 12 | 0018-9294 |
Citations | PageRank | References |
8 | 0.74 | 2 |
Authors | ||
4 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Govind Kannan | 1 | 20 | 4.49 |
| Ali A. Milani | 2 | 31 | 5.60 |
| Issa M. S. Panahi | 3 | 49 | 14.53 |
| R. Briggs | 4 | 366 | 23.57 |