ULTRASONIC DIAGNOSTIC APPARATUS AND PROGRAM

摘要

To provide an ultrasonic diagnostic apparatus with which shear waves may be propagated more reliably while suppressing attenuation. An ultrasonic diagnostic apparatus is characterized in comprising: an ultrasonic probe 2 for transmitting a first ultrasonic beam BMl to biological tissue T in a subject; a transmission control section for transmitting an ultrasonic beam for generating shear waves in the biological tissue T from the ultrasonic probe 2 to the biological tissue T while applying steering to the beam; and a region-defining section for defining a region R in an ultrasonic image of the subject, wherein the transmission control section transmits the first ultrasonic beam BMl while applying steering to the beam by setting transmission parameters such that the first ultrasonic beam BMl travels closest to and outside of the region R.