ACOUSTIC WAVE IMAGE GENERATING APPARATUS AND CONTROL METHOD THEREOF

摘要

There are provided an acoustic wave image generating apparatus for generating a B-mode image having a fixed brightness and a control method thereof. First brightness information (81) indicating the brightness of a first B-mode image in the depth direction of the subject is generated. Positional deviation correction is performed on an acoustic wave echo signal having a positional deviation between the focusing position of acoustic waves and the observation target position, and second brightness information (82) indicating the brightness in the depth direction of the subject is generated from a superposition signal obtained by superimposing an acoustic wave echo signal for which the positional deviation has been corrected and an acoustic wave echo signal without positional deviation. The brightness of the first B-mode image is corrected based on the first brightness information and the second brightness information.

主权项

1. An acoustic wave image generating apparatus, comprising:
an acoustic wave probe in which a plurality of acoustic wave transducers are arranged in at least one direction; a driving device for performing processing for transmitting acoustic waves, which converge on a focusing position, to a subject from the acoustic wave transducers to be driven while sequentially updating the acoustic wave transducers to be driven; a first acoustic wave image generation device for generating a first acoustic wave image, which shows a brightness of a cross section of the subject, from acoustic wave echo signals that are output from the acoustic wave transducers due to the acoustic wave transducers receiving acoustic wave echoes at an observation target position of the subject obtained based on the driving of the acoustic wave transducers by the driving device; a first brightness information generation device for generating first brightness information indicating a brightness of the first acoustic wave image in a depth direction of the subject; a positional deviation correction device for correcting, for the acoustic wave echo signal having a positional deviation between the focusing position and the observation target position in the one direction, the positional deviation according to positions of the acoustic wave transducers driven by the driving device; a second brightness information generation device for generating second brightness information, which indicates a brightness in the depth direction of the subject, from a superposition signal obtained by superimposing the acoustic wave echo signal for which the positional deviation has been corrected by the positional deviation correction device and the acoustic wave echo signal without the positional deviation; and a brightness correction device for correcting a brightness of the first acoustic wave image generated by the first acoustic wave image generation device based on the first brightness information generated by the first brightness information generation device and the second brightness information generated by the second brightness information generation device.