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Speed ​​of Sound Imaging Using Shear Waves

A speed imaging and shear wave technology, applied in ultrasonic/sonic/infrasonic diagnosis, ultrasonic/sonic/infrasonic Permian technology, application, etc., can solve inaccurate problems

Active Publication Date: 2020-09-25
SIEMENS MEDICAL SOLUTIONS USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

the assumption may be inaccurate

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  • Speed ​​of Sound Imaging Using Shear Waves
  • Speed ​​of Sound Imaging Using Shear Waves
  • Speed ​​of Sound Imaging Using Shear Waves

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Embodiment Construction

[0016] The speed of sound is estimated and imaged using shear waves. The shear waves are generated using acoustic radiation force shocks. The tissue displacement from the shear wave is obtained for multiple locations using an ultrasound scanner and analyzed to estimate the speed of sound. In one embodiment, the speed of sound is estimated by observing the propagation of shear waves in the medium. Known or pre-estimated stiffness or shear velocity are used together with shear wave propagation information to estimate the velocity of sound.

[0017] Because the timing of the shear wave displacement at different locations is determined, pulse-echo ultrasound can be used to estimate the speed of sound. Sound velocity may be diagnostically useful, such as being more strongly associated with disease state than other measures (eg, more strongly than shear velocity or tissue stiffness).

[0018] figure 1 One embodiment of a method for sound velocity imaging is shown. Ultrasonic sc...

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Abstract

The present invention relates to sound velocity imaging using shear waves. Shear wave propagation is used to estimate the velocity of sound in the patient. An ultrasound scanner detects when a shear wave occurs at each of a number of locations. The resulting time difference, given tissue stiffness or shear velocity, is used to estimate the sound velocity for the patient's specific tissue.

Description

technical field [0001] This embodiment relates to the determination of the speed of sound using ultrasound. Background technique [0002] In ultrasound imaging, the speed of sound is assumed, such as being assumed to be 1450 m / s. The delay or phase profile used to focus the ultrasound beam depends on the assumed speed of sound. This assumption may not be accurate. The speed of sound in tissue varies based on the properties of the tissue. [0003] Ultrasound tomography can be used to measure the speed of sound. Ultrasound tomography relies on placing the patient between a transmitter and receiver. The travel time for sound energy to travel completely through the patient from the transmitter to the receiver is used to calculate the speed of sound in the patient. Most ultrasound scanners use pulse-echo, in which case the same transducer is used for both transmit and receive operations, so sound velocity is not estimated in the same way as pulse-echo systems. Since the pos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B8/00
CPCA61B8/48A61B8/5207G01S7/52049G01S7/52042G01S7/52022A61B8/461A61B8/485A61B8/5223G16H50/30A61B8/4477A61B8/4494A61B8/08
Inventor D.邓肯范列湘金乘洙Y.拉拜德S.罗森茨魏希
Owner SIEMENS MEDICAL SOLUTIONS USA INC
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