5 results about "Shear wave imaging" patented technology

The present disclosure describes ultrasound systems and methods configured to interrogate the stiffness and / or elasticity of a target tissue through shear wave imaging. The systems can be configured to transmit multiple push pulses at different focal depths in the target tissue in a strobe-like fashion. The rapidly transmitted push pulses can generate constructive interference to form shear waves of a composite shear wave. An example system can include a beamformer configured to transmit parameters of a push pulse to a transducer array while receiving new parameters of a push pulse from a controller. The dual transmission and reception of parameters of different push pulses reconfigures the beamformer without interrupting push pulse transmission, thereby minimizing the delay between successive push pulses. The push pulses transmitted according to the disclosed methods can generate a composite shear wave configured to interrogate the tissue with enhanced sensitivity over a wide range of depths.

For shear wave imaging with ultrasound, the apparent pulse repetition frequency is increased by combining displacements from different lateral locations. Different combinations based on different shear wave velocities and corresponding time shifts and / or attenuations and corresponding scalings are tested to find a smooth displacement profile for the combination. Once the smooth displacement profile is found, the corresponding shear wave velocity is estimated or determined.

For shear wave imaging with ultrasound, the apparent pulse repetition frequency is increased by combining displacements from different lateral locations. Different combinations based on different shear wave velocities and corresponding time shifts and / or attenuations and corresponding scalings are tested to find a smooth displacement profile for the combination. Once the smooth displacement profile is found, the corresponding shear wave velocity is estimated or determined.

The utility model discloses a selection circuit, an emission power supply and ultrasonic equipment, and solves the problem of different emission current demands in different imaging modes. According to the scheme, in the shear wave imaging mode, the resistance value is small when the shear wave path is conducted, so that large transient wave beam energy is provided for the transmitting circuit; in a conventional imaging mode, such as a conventional PW or Color mode, the resistance value of a conventional path is large, at the moment, relatively small energy is provided for the transmitting circuit, and the transmitting requirement in the conventional imaging mode can be met. In conclusion, through switching of the shear wave path and the conventional path, efficient transmission of appropriate emission current and emission energy in different imaging modes is achieved, the current requirements in the shear wave imaging mode and the conventional imaging mode are met at the same time, and the adaptability and performance of the switching power supply are improved.

The invention discloses ultrasonic equipment and a heart evaluation device, and is applied to the technical field of ultrasound. A transmitting and receiving control circuit; the processor is used for performing a strain imaging mode on a first cardiac muscle tissue of the target heart so as to obtain at least one strain elastic parameter of the first cardiac muscle tissue in a cardiac cycle; performing a shear wave imaging mode on a second cardiac muscle tissue of the target heart to obtain a shear wave elastic parameter of the second cardiac muscle tissue; and obtaining a heart performance quantitative evaluation result according to the at least one strain elastic parameter and the shear wave elastic parameter, wherein the heart performance quantitative evaluation result is used for representing the contraction performance and / or diastolic performance of the target heart. Quantitative evaluation is comprehensively performed from the deformation dimension and the elastic dimension of the myocardial tissue, so that the contraction performance and the relaxation performance of the heart are comprehensively and intuitively evaluated.