MECHANICAL SHEAR WAVE GENERATION FOR ULTRASONIC ELASTOGRAPHY

    公开(公告)号:US20230181162A1

    公开(公告)日:2023-06-15

    申请号:US17923962

    申请日:2021-05-07

    CPC classification number: A61B8/485 A61B5/0051 A61B8/42

    Abstract: An ultrasonic diagnostic imaging system performs elastography using mechanically generated vibrations from a vibration assembly attached to an ultrasound probe. An attachment member attaches the vibration assembly to the probe. A vibration motor is mounted in a motor mount and applies vibration energy to the body in which shear waves are to be measured, at a location adjacent to the probe. The vibration motor mount is coupled to the attachment member by a vibration isolation element such as a spring, rubber band, or elastic compound which isolates the probe from deleterious vibration energy from the vibration motor.

    VIBRATION ACTUATOR FOR SHEAR WAVE ELASTOGRAPHY, SYSTEM AND METHOD

    公开(公告)号:US20240055936A1

    公开(公告)日:2024-02-15

    申请号:US18266667

    申请日:2021-12-14

    CPC classification number: H02K7/063 A61B8/485 H02K11/22 A61B8/4488

    Abstract: A vibration actuator (10) for mechanically generating a shear wave comprises a plurality of n rotational vibrators (141, 142, 143), an accelerometer (16), and a controller (18). The plurality of n rotational vibrators enables generation of a vibration vector with desired directional behavior selected from a plurality of vibration vectors (34, 36, 38) of different directional behaviors. Each rotational vibrator comprises an independently controllable motor (20) having a drive shaft (22) and an eccentric disk (24). The accelerometer is arranged to detect a vibration vector generated by at least two of the plurality of n rotational vibrators. The controller selectively controls a first set of two rotational vibrators to rotate respective eccentric disks in a first coordinated manner to produce a first vibration vector, and a second set of two rotational vibrators to rotate respective eccentric disks in a second coordinated manner to produce a second vibration vector, with different respective directional behaviors.

    SYSTEMS AND METHODS FOR FINDING HEPATO-RENAL INDICES

    公开(公告)号:US20220401078A1

    公开(公告)日:2022-12-22

    申请号:US17775635

    申请日:2020-11-22

    Abstract: Systems and methods for calculating hepato-renal index (HRI) values from radiofrequency (RF) data are disclosed herein. The RF data may include fundamental frequency components, harmonic frequency components, or a combination thereof. Signal intensities within regions of interest may be calculated from the RF data. The signal intensities may be averaged to arrive at an average signal intensity value for each region of interest. In some examples, some of the highest and/or lowest signal intensity values may be removed prior to averaging. The ratio of the average signal intensities from the different regions of interest may be then be taken to arrive at the HRI values.

    Vibration actuator for shear wave elastography, system and method

    公开(公告)号:US12283868B2

    公开(公告)日:2025-04-22

    申请号:US18266667

    申请日:2021-12-14

    Abstract: A vibration actuator (10) for mechanically generating a shear wave comprises a plurality of n rotational vibrators (141, 142, 143), an accelerometer (16), and a controller (18). The plurality of n rotational vibrators enables generation of a vibration vector with desired directional behavior selected from a plurality of vibration vectors (34, 36, 38) of different directional behaviors. Each rotational vibrator comprises an independently controllable motor (20) having a drive shaft (22) and an eccentric disk (24). The accelerometer is arranged to detect a vibration vector generated by at least two of the plurality of n rotational vibrators. The controller selectively controls a first set of two rotational vibrators to rotate respective eccentric disks in a first coordinated manner to produce a first vibration vector, and a second set of two rotational vibrators to rotate respective eccentric disks in a second coordinated manner to produce a second vibration vector, with different respective directional behaviors.

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