Patent ID: 9339258
Filing Date: 2016-05-17
CPC Classification: A61B,G01S,G10K

Claim Text:
1. An ultrasonic diagnosis apparatus comprising: an array transducer which is composed of a plurality of transducer elements; a delay processor which performs delay processing with respect to a plurality of element reception signals output from the plurality of transducer elements; a summing processor which performs summing processing with respect to the plurality of element reception signals having been subjected to the delay processing and outputs a reception signal, the plurality of element reception signals having been subjected to the delay processing are summed to generate the reception signal during the summing processing; a circuit which extracts a sign data array formed of a plurality of sign data items arranged in an element arranging direction, from the plurality of element reception signals having been subjected to the delay processing but not having been subjected to the summing processing; an evaluation value computing circuit which computes an evaluation value based on a direct current vicinity component contained in the sign data array in accordance with a weighting function for apodization, wherein the direct current vicinity component is a power component existing within a section from the frequency zero to a predetermined frequency in a power spectrum of the sign data array; and a gain adjustment unit which adjusts gain of the reception signal by multiplying the reception signal by the evaluation value.