Method for ultrasound vibrometry using orthogonal basis functions
US8602994B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2010 |
| Grant date | Dec 10, 2013 |
| Priority date | — |
| Expiry date | Mar 9, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S15/8952
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for measuring a mechanical property of a subject includes using an ultrasound transducer to apply ultrasonic vibration pulses to a location in a subject in order to induce shear waves at multiple prescribed orthogonal frequencies in the subject. The ultrasound transducer is directed by an excitation signal that is composed of multiple orthogonal basis functions, each having a given frequency component corresponding to the prescribed orthogonal frequencies. The power level of each orthogonal basis function is independently adjustable. The excitation signal can be sparsely sampled, or portions of the excitation signal can be removed in order to improve tissue vibration and to provide for the interleaving ultrasonic vibration and detection pulses. Ultrasonic detection pulses are applied to at least one motion detection point, from which echo signals are received. From the received echo signals, a motion signal is determined, from which mechanical properties of the subject are calculated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.