### Abstract

Phases of tissue harmonic motions, induced by the ultrasound radiation force, over a distance can be detected by pulse echo ultrasound and Kalman filter. However, large background motions due to cardiovascular motion distort the weak harmonic vibration. The background motion can be modeled by the Wiener process or random-walk process. The harmonic motion and the background motion are represented by a fourth-order differential equation and four state variables. Based on this model, the Kalman filter estimates phase shifts of shear wave over a short distance in a tissue region from large background motions. The study shows that the estimates are valid when the velocity and acceleration of background motion are less than 3 m/s and 3 m/s/s, respectively.

Original language | English (US) |
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Title of host publication | Proceedings - IEEE Ultrasonics Symposium |

Pages | 718-721 |

Number of pages | 4 |

Volume | 1 |

DOIs | |

State | Published - 2006 |

### Fingerprint

### Keywords

- Harmonic motion
- Kalman filter
- Phase shift
- Random process
- Shear wave
- Shear wave speed
- Vibration

### ASJC Scopus subject areas

- Acoustics and Ultrasonics

### Cite this

*Proceedings - IEEE Ultrasonics Symposium*(Vol. 1, pp. 718-721). [4152050] https://doi.org/10.1109/ULTSYM.2006.194

**Measurement of shear wave using ultrasound and Kalman filter with large background motion for cardiovascular studies.** / Zheng, Y.; Yao, A.; Chen, Shigao D; Greenleaf, James F.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

*Proceedings - IEEE Ultrasonics Symposium.*vol. 1, 4152050, pp. 718-721. https://doi.org/10.1109/ULTSYM.2006.194

}

TY - GEN

T1 - Measurement of shear wave using ultrasound and Kalman filter with large background motion for cardiovascular studies

AU - Zheng, Y.

AU - Yao, A.

AU - Chen, Shigao D

AU - Greenleaf, James F

PY - 2006

Y1 - 2006

N2 - Phases of tissue harmonic motions, induced by the ultrasound radiation force, over a distance can be detected by pulse echo ultrasound and Kalman filter. However, large background motions due to cardiovascular motion distort the weak harmonic vibration. The background motion can be modeled by the Wiener process or random-walk process. The harmonic motion and the background motion are represented by a fourth-order differential equation and four state variables. Based on this model, the Kalman filter estimates phase shifts of shear wave over a short distance in a tissue region from large background motions. The study shows that the estimates are valid when the velocity and acceleration of background motion are less than 3 m/s and 3 m/s/s, respectively.

AB - Phases of tissue harmonic motions, induced by the ultrasound radiation force, over a distance can be detected by pulse echo ultrasound and Kalman filter. However, large background motions due to cardiovascular motion distort the weak harmonic vibration. The background motion can be modeled by the Wiener process or random-walk process. The harmonic motion and the background motion are represented by a fourth-order differential equation and four state variables. Based on this model, the Kalman filter estimates phase shifts of shear wave over a short distance in a tissue region from large background motions. The study shows that the estimates are valid when the velocity and acceleration of background motion are less than 3 m/s and 3 m/s/s, respectively.

KW - Harmonic motion

KW - Kalman filter

KW - Phase shift

KW - Random process

KW - Shear wave

KW - Shear wave speed

KW - Vibration

UR - http://www.scopus.com/inward/record.url?scp=52749098570&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=52749098570&partnerID=8YFLogxK

U2 - 10.1109/ULTSYM.2006.194

DO - 10.1109/ULTSYM.2006.194

M3 - Conference contribution

SN - 1424402018

SN - 9781424402014

VL - 1

SP - 718

EP - 721

BT - Proceedings - IEEE Ultrasonics Symposium

ER -