Ultrasound diagnostic apparatus and shear-elasticity measurement method therefor

摘要

An inventive ultrasound diagnostic device is provided, which can display information on the temperature rise in a biological object under ultrasound radiation for measurement of a shear elasticity of a biological tissue of interest, thereby drawing attention of an examiner of the device and enabling him to retain the temperature rise within a predetermined safe range while performing the shear elasticity measurement. The device is adapted to measure the shear elasticity of a tissue by ultrasonic waves emitted from a probe. The device has a calculation unit configured to calculate a rise in temperature of the biological tissue irradiated with a focused ultrasonic (US) beam, and a display unit configured to display the temperature information obtained.

主权项

1. An ultrasound diagnostic device, the ultrasound diagnostic device comprising:
a control unit that is implemented by a processor; and a calculation unit that is implemented via the control unit and that is configured to calculate a shear elasticity of an object, wherein the ultrasound diagnostic device measures the shear elasticity of the object by an ultrasound wave from a probe, wherein the probe irradiates an ultrasound wave to a plurality of focusing regions of the object; and wherein the control unit constructs a simulated profile of an ultrasound beam based on at least one of a shape of the probe, and a transmission frequency, a transmission waveform and a transmission power of the ultrasound wave, when the control unit determines, using the simulated profile, that a displacement of tissue of the object in a first focusing region of the plurality of focusing regions is larger than a predetermined threshold due to a longitudinal ultrasound wave and/or a displacement of the tissue in the first focusing region is smaller than a predetermined threshold due to a transverse ultrasound wave, the control unit controls the calculation unit to calculate the shear elasticity of the first focusing region based on another ultrasound wave irradiated to a second focusing region of the plurality of focusing regions other than the first focusing region instead of an ultrasound wave irradiated to the first focusing region.