1. An ultrasonic diagnostic apparatus comprising: an ultrasonic wave transmitting/receiving unit that transmits an ultrasonic wave to a subject, receives a reflected wave of the ultrasonic wave, and generates echo signals of a plurality of frames on the basis of the received reflected wave; an image data generating unit that generates three-dimensional image data composed of a plurality of two-dimensional images on the basis of the echo signals of the plurality of frames; an image generating unit that generates a first image by performing a process of enhancing a microstructure included in the three-dimensional image data; and a display unit that displays the first image.