Ultrasound diagnostic apparatus and ultrasound image processing method

摘要

An ultrasound diagnostic apparatus which performs diagnosis of a subject to be examined by using an ultrasound probe which emits ultrasound waves and receives the ultrasound waves reflected by the subject, includes a measuring section which measures a motion velocity of local tissue of the subject by using an ultrasound waves transmitted/received by the ultrasound probe, an acquiring section which acquires motion information representing a strain or displacement of the tissue on the basis of the motion velocity, and a calculating section which calculates a parameter value representing a change amount of motion of the tissue with a change in load on the basis of two pieces of motion information acquired by the acquiring section in two load states in which different loads are applied to the subject.

主权项

1. An ultrasound image processing method of performing image processing for diagnosis of a subject to be examined on the basis of a motion velocity measured repeatedly with respect to local tissue in the subject at intervals shorter than a motion cycle of the tissue by using ultrasound waves transmitted and received by an ultrasound probe, comprising:
acquiring information, using a motion information computing unit in an ultrasound diagnostic system, representing motion corresponding to a strain or displacement of the tissue on the basis of local time integration processing using a plurality of the measured motion velocities; and calculating a parameter value, using a change amount computing unit in the ultrasound diagnostic system, representing a change amount of motion of the tissue with a change in load on the basis of a first item of motion information representing a first peak value of a pixel in a first motion image acquired over a time interval of the motion cycle at a first phase and a second item of motion information representing a second peak value of the pixel in a second motion image acquired over the time interval of the motion cycle at a second phase, the first item of motion information being acquired before an exercise load or drug load is applied and the second item of motion information being acquired during application of the exercise load or drug load.