Abstract:
An ultrasound diagnostic apparatus includes: a probe that includes a transducer array including transducers, which are activated as a first transducer group and a second transducer group, is configured to transmit ultrasound waves by at least one transducer included in the first transducer group and at least one transducer included in the second transducer group, and to detect echo signals from an object; and a controller configured to select a number of transducers to be activated in the first transducer group and in the second transducer group based on the object or a measurement result, generate echo images from the echo signals, and measure an object change movement speed, which is a speed at which a change in the object moves, from the echo images.
Abstract:
A method of obtaining elasticity information of a region of interest (ROI) includes obtaining a first elasticity information of an object by using a shear wave induced to the object, setting an internal ROI of the object, based on the first elasticity information, obtaining a second elasticity information of the ROI by using a shear wave induced to the ROI, and obtaining a third elasticity information of the ROI by using the first and second elasticity information.
Abstract:
A method of providing an ultrasound elastography image that includes inducing a shear wave by transmitting a first ultrasound signal pushing an object to the object, transmitting a second ultrasound signal tracing the shear wave to the object to receive a response signal to the second ultrasound signal from the object; acquiring an elastography image of the object, based on the response signal, and providing the elastography image of the object and transmission position information of the first ultrasound signal.
Abstract:
An ultrasound diagnostic method and apparatus determines a transmission condition for generating shear waves at two or more positions of an object, for each of a plurality of elements of a transducer, and generates an ultrasound signal transmitted to the object through a full aperture of the transducer, according to the transmission condition.
Abstract:
A method of generating an ultrasound elastic image includes: inducing a shear wave that propagates in a second direction by transmitting a first ultrasound signal including a push signal to an object in a first direction, by a curved array probe; transmitting a second ultrasound signal to the object and receiving an echo signal reflected by the object in response to the second ultrasound signal, via the curved array probe; and generating an elastic image of the object by using the received echo signal. The second ultrasound signal includes a plane wave having a straight line waveform parallel to the second direction.
Abstract:
A method of analyzing elastography of tissue using a one-dimensional (1D) ultrasound probe. The method includes: acquiring two-dimensional (2D) ultrasound images with respect to a region of interest (ROI) of an object to be diagnosed, to which a shear wave is induced, using the 1D ultrasound probe; measuring a displacement of the shear wave from the acquired 2D ultrasound images; estimating a change rate in the displacement of the shear wave along a y-axis direction orthogonal to a 2D plane on which the 2D ultrasound images are shown, using the measured displacement; and analyzing elastography information of tissue in the ROI using the measured displacement and the estimated displacement change rate.
Abstract:
A method and apparatus for analyzing elastography of tissue using ultrasound waves, wherein elastography information of tissue in a region of interest (ROI) is analyzed by irradiating ultrasound waves for diagnosis towards the ROI to which a shear wave is induced from an ultrasound probe, receiving echo ultrasound waves, and acquiring three-dimensional (3D) ultrasound images with respect to the ROI.
Abstract:
A method of measuring propagation of a shear wave by using an ultrasound transducer includes generating a shear wave inside the object, setting a region of interest (ROI) on which propagation of the shear wave is to be observed, and determining a position of a second focus on which ultrasound signals are to be directed to obtain information about the ROI, irradiating the ultrasound signals toward the second focus, and receiving echo signals reflected from the ROI.
Abstract:
A method of displaying an elastography image and an ultrasound diagnosis apparatus performing the method are provided. The method includes transmitting an ultrasound signal to an object, receiving a response signal to the transmitted ultrasound signal, determining ultrasound image data based on the received response signal, determining displacement image data based on the determined ultrasound image data, generating elastography images based on the determined displacement image data, dividing the elastography images into sections based on a criterion, and determining a representative elastography image of each of the sections based on one or more elastography images in each of the sections and quality information of the one or more elastography images, the quality information being based on a strain of a first elastography image among the one or more elastography images. The method further includes displaying the representative elastography image.
Abstract:
A probe irradiates an ultrasound wave to an object to induce a shear wave and first elasticity information is obtained according to a first calculating scheme. An internal region of interest of the object is set based on shear modulus values included in the first elasticity information. Second elasticity information is obtained based on the shear wave induced to the internal region of interest, according to a second calculating scheme. Accurate elasticity information is acquired by using the first and second elasticity information to obtain third elasticity information from which an elastography image is generated for display to a user.