Detection of motion in vibro-acoustography
US7785259B2 · kind B2 · utility
20Cited by
11References
15Claims
0Family size
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Key dates
| Filing date | Oct 1, 2004 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | Nov 14, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B8/485
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Harmonic motion is produced in a subject using vibro-acoustography. An ultrasonic imaging system repetitively interrogates the subject and the Doppler shift in the reflected echo signals is analyzed to measure the phase and amplitude of harmonic motion produced in the subject at different prescribed frequencies. Shear wave propagation through the subject is determined from this information and mechanical properties related to “stiffness” of the subject are determined. A Kalman filter is employed in the phase and amplitude measurement to extract the harmonic motion information from background noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.