Real time artifact removal
AssigneeDrexel University
InventorsMeltem Alkan Izzetoglu, Kurtulus Izzetoglu
Life of this patent
Estimating the term…
Abstract
Noise artifacts may be removed from a signal utilizing functional near infrared (fNIR) spectroscopy measurement techniques. The noise removal may be accomplished in field conditions, such as, for example, in an operating room setting. In an example configuration, to remove noise artifacts, independent component analysis (ICA) and principal component analysis (PCA) may be implemented in a procedure that utilizes a dark current measurement as a reference signal. The use of the combined ICA/PCA analysis and dark current measurement reference signal allows noise to be removed on a per channel basis, thus providing an effective noise removal procedure and allowing for a single active measurement channel.
Claims20
A method comprising:
- receiving a reference signal and a measurement signal;
- determining, based on a first component analysis of the measurement signal and the reference signal, a first adjusted measurement signal;
- determining, based on a second component analysis of the measurement signal and the reference signal, a second adjusted measurement signal;
- determining a correlation between the first adjusted measurement signal and the reference signal;
- determining a correlation between the second adjusted measurement signal and the reference signal;
- and
- determining a noise-removed signal based on:
- the correlation between the first adjusted measurement signal and the reference signal;
- and
- the correlation between the second adjusted measurement signal and the reference signal.
A computer-readable storage medium having stored thereon executable instructions that when executed perform operations comprising:
- receiving a reference signal and a measurement signal;
- determining, based on a first component analysis of the measurement signal and the reference signal, a first adjusted measurement signal;
- determining, based on a second component analysis of the measurement signal and the reference signal, a second adjusted measurement signal;
- determining a correlation between the first adjusted measurement signal and the reference signal;
- determining a correlation between the second adjusted measurement signal and the reference signal;
- and
- determining a noise-removed signal based on:
- the correlation between the first adjusted measurement signal and the reference signal;
- and
- the correlation between the second adjusted measurement signal and the reference signal.
A computing device comprising:
- memory having executable instructions stored thereon;
- a processor communicatively coupled to the memory, the processor configure to execute the executable to perform operations comprising:
- receiving a reference signal and a measurement signal;
- determining, based on a first component analysis of the measurement signal and the reference signal, a first adjusted measurement signal;
- determining, based on a second component analysis of the measurement signal and the reference signal, a second adjusted measurement signal;
- determining a correlation between the first adjusted measurement signal and the reference signal;
- determining a correlation between the second adjusted measurement signal and the reference signal;
- and
- determining a noise-removed signal based on:
- the correlation between the first adjusted measurement signal and the reference signal;
- and
- the correlation between the second adjusted measurement signal and the reference signal.
Dependencies are inferred from the claim text.