Abstract by Trent Furlong
Physics and Astronomy
Using time reversal focusing for active control of magnetic resonance imaging noise
The noise produced by an magnetic resonance imaging (MRI) scan can cause discomfort to patients. Active noise control (ANC) systems have been developed to help reduce the amount of noise a patient experiences. However, due to the small enclosure of the MRI machine, ANC equipment can be cumbersome to use, and is limited to non-ferrous material. Time reversal acoustics (TRA) is a technique that can focus a sound signal to an arbitrary position in space that may be far from actual sound sources. We are exploring a new application of TRA as a type of ANC by broadcasting a focused antinoise signal to cancel the noise signal from a source. We hope to use this application to help cancel the noise at a patient’s ears during the MRI process.