Diffusing wave spectroscopy apparatus and control method therefor

A method of calibrating measurements of a diffusing wave spectroscopy apparatus, comprising:

• emitting a coherent light from a source to irradiate tissue of a subject;
• detecting, using a detector, light intensity of scattered light after propagation of the light through the tissue of the subject;
• measuring a source-detector distance;
• calculating an intensity autocorrelation function by using light intensity data corresponding to light intensity signals obtained from the detector, and deriving a time decay value of the intensity autocorrelation function;
• and
• calibrating the intensity autocorrelation function by adjusting the time decay value of the intensity autocorrelation function based on the measured source-detector distance.

A system comprising:

• one or more processors;
• and
• one or more computer-readable media coupled to the one or more processors, the one or more computer-readable media storing instructions that, when executed by the one or more processors, cause the one or more processors to perform operations comprising:
• emitting a coherent light from a source to irradiate tissue of a subject;
• detecting, using a detector, light intensity of scattered light after propagation of the light through the tissue of the subject;
• measuring a source-detector distance;
• calculating an intensity autocorrelation function by using light intensity data corresponding to light intensity signals obtained from the detector, and deriving a time decay value of the intensity autocorrelation function;
• and
• calibrating the intensity autocorrelation function by adjusting the time decay value of the intensity autocorrelation function based on the measured source-detector distance.

A computer-readable medium storing instructions that, when executed by one or more processors, cause the one or more processors to perform operations comprising:

• emitting a coherent light from a source to irradiate tissue of a subject;
• detecting, using a detector, light intensity of scattered light after propagation of the light through the tissue of the subject;
• measuring a source-detector distance;
• calculating an intensity autocorrelation function by using light intensity data corresponding to light intensity signals obtained from the detector, and deriving a time decay value of the intensity autocorrelation function;
• and
• calibrating the intensity autocorrelation function by adjusting the time decay value of the intensity autocorrelation function based on the measured source-detector distance.