Ultrasound diagnostic apparatus

An ultrasound diagnostic apparatus comprising:

• a specific region decision unit that decides a specific region corresponding to a portion of an ultrasound tomographic image corresponding to ultrasound data obtained by transmitting and receiving ultrasound waves to and from a subject, in a data space of the ultrasound data;
• a specific parameter decision unit that decides a specific parameter, which is an image quality adjustment parameter for the specific region, based on output of a learning model in a case in which the ultrasound data of an inside of the specific region is input to the learning model that has been trained to output an image adjustment parameter suitable for the ultrasound data from the input ultrasound data by using learning data including the ultrasound data obtained by transmitting and receiving the ultrasound waves to and from the subject and a training image adjustment parameter to be used in image quality adjustment processing on the ultrasound data;
• and
• an image quality adjustment processing unit that executes image quality adjustment processing of adjusting an image quality of the inside of the specific region of the ultrasound tomographic image on the ultrasound data of the inside of the specific region based on the specific parameter, and executes image quality adjustment processing of adjusting an image quality of an outside of the specific region of the ultrasound tomographic image on the ultrasound data of the outside of the specific region by using a predetermined parameter for image quality adjustment different from the specific parameter.