| CPC G01S 7/52077 (2013.01) [A61B 8/12 (2013.01); A61B 8/4494 (2013.01); A61B 8/5269 (2013.01)] | 26 Claims |
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1. A system for use with multiple ultrasound transducers disposed on a catheter and connected to different respective channels, the system comprising:
circuitry, configured to:
receive a signal, which includes a transduction of ultrasound reflections, over any given one of the channels, and
receive respective noise-signals, which include less transduction of ultrasound reflections than does the signal, over a group of others of the channels; and
a processor, configured to:
receive the signal and the noise-signals from the circuitry, and
reduce noise in the signal, by:
based on the noise-signals, computing one or more noise-estimation functions for the given channel by extracting another noise-signal from the signal and computing the noise-estimation functions based on the received noise-signals and the extracted noise-signal, each of the noise-estimation functions being applicable to a respective subset of the noise-signals so as to return an estimate of noise received over the given channel while the subset of the noise-signals were received,
using the noise-estimation functions, computing an estimated-noise signal by applying the noise-estimation functions to the received noise-signals, and
subtracting the estimated-noise signal from the signal.
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14. A method for use with multiple ultrasound transducers disposed on a catheter and connected to different respective channels, the method comprising:
receiving a signal, which includes a transduction of ultrasound reflections, over any given one of the channels;
receiving respective noise-signals, which include less transduction of ultrasound reflections than does the signal, over a group of others of the channels; and
reducing noise in the signal, by:
based on the noise-signals, computing one or more noise-estimation functions for the given channel by extracting another noise-signal from the signal and computing the noise-estimation functions based on the received noise-signals and the extracted noise-signal, each of the noise-estimation functions being applicable to a respective subset of the noise-signals so as to return an estimate of noise received over the given channel while the subset of the noise-signals were received,
using the noise-estimation functions, computing an estimated-noise signal, and
subtracting the estimated-noise signal from the signal.
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