Motion independence in acoustic radiation force impulse imaging

A technology of acoustic radiation force and pulse, applied in organ movement/change detection, ultrasound/sound wave/infrasonic image/data processing, sound wave diagnosis, etc., can solve problems such as incorrect speed determination

Active Publication Date: 2017-07-18
SIEMENS MEDICAL SOLUTIONS USA INC
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Problems solved by technology

This movement may lead to undesired changes in the maximum displacement and the occurrence of relative phase shift, resulting in an incorrect velocity determination

Method used

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  • Motion independence in acoustic radiation force impulse imaging
  • Motion independence in acoustic radiation force impulse imaging
  • Motion independence in acoustic radiation force impulse imaging

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Embodiment Construction

[0019] Physiological motion during an Acoustic Radiation Force Impulse (ARFI) scan can cause large errors in the estimation of shear or longitudinal wave velocities or other viscoelastic parameters. For physiological motion-independent ARFI imaging, ultrasound imaging systems with high parallel beamforming capabilities track shear waves at multiple spatial locations simultaneously. Use relative displacement or peak values ​​over space rather than time. Since displacements at different locations but at the same time are subject to the same motion, peak identification or displacement profiles are independent of physiological motion.

[0020] Figure 1-4 The effect of physiological motion is shown where peaks are determined over time rather than space. figure 1 and 2 Displacement sampling in conventional ARFI imaging is shown. Repeated ARFI pushes are required as displacements are estimated with large regions of the system with limited beamforming. figure 1 Regions of intere...

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Abstract

The invention relates to motion independence in acoustic radiation force impulse imaging. Motion independent acoustic radiation force impulse imaging is provided. Rather than rely on the displacement over time for each location, the displacements over locations for each time are used. Parallel beamforming is used to simultaneously sample across a region of interest. Since it may be assumed that the different locations are subjected to the same motion at the same time, finding a peak displacement over locations for each given time provides peak or profile information independent of the motion. The velocity or other viscoelastic parameter may be estimated from the displacements over locations.

Description

Background technique [0001] This embodiment relates to Acoustic Radiation Force Impulse (ARFI) imaging. Ultrasound can be used to displace tissue by generating shear or longitudinal waves by transmitting ARFI excitation pulses. The displacement caused by the wave generated by the excitation pulse can be measured using an additional ultrasound scan or trace. [0002] To determine the velocity of the shear waves generated in the tissue, the displacement is estimated over time for each location. Find the maximum displacement over time and / or the relative phase shift in the displacement time profile between positions. Noise is introduced into the displacement over time because the patient's heart and / or respiratory motion causes different amounts of tissue movement at different times. This movement may lead to undesired changes in the maximum displacement and the occurrence of relative phase shift, resulting in an incorrect velocity determination. Contents of the invention ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B8/08
CPCA61B8/0833A61B8/4483A61B8/469A61B8/485G01S7/52042G01S7/52022A61B8/5276A47L13/58B08B3/10A61B8/08
Inventor 范列湘Y.拉拜德
Owner SIEMENS MEDICAL SOLUTIONS USA INC
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