OBJECT INFORMATION ACQUIRING APPARATUS AND CONTROL METHOD FOR SAME

摘要

Provided is an object information acquiring apparatus including elements with which an acoustic wave is transmitted to and received from an object and converted into a plurality of received signals, a processor that acquires a power intensity signal of the inside of the object, and a corrector that corrects the power intensity signal, the processor being configured to calculate correlation values of frequency components, perform frequency average processing on a correlation matrix that is a set of the plurality of calculated correlation values to acquire a first power intensity signal, and reduce variance of elements in the diagonal direction of the correlation matrix to acquire a second power intensity signal, and the corrector being configured to output a power intensity signal subjected to correction processing.

主权项

1. An object information acquiring apparatus comprising:
a plurality of converting elements with which an acoustic wave is transmitted to an object and the acoustic wave reflected within the object is received and converted into a plurality of received signals; a processor that acquires, using the plurality of received signals, a power intensity signal showing a distribution of power intensity in a plurality of positions within the object through processing using frequency domain interferometry to which adaptive signal processing is applied; and a corrector that performs correction processing on the power intensity signal, the processor being configured to calculate a plurality of correlation values of frequency components using the plurality of received signals, perform frequency average processing on a correlation matrix that is a set of the plurality of calculated correlation values to acquire a first power intensity signal using a plurality of values obtained by the frequency average processing, and perform processing of reducing variance of elements in a diagonal direction of the correlation matrix using the plurality of calculated correlation values to acquire a second power intensity signal using the plurality of values subjected to this processing, and the corrector being configured to output a power intensity signal subjected to correction processing using the first power intensity signal and the second power intensity signal.