Multipulse elastography method
AssigneeEchosens
InventorsLaurent Sandrin, Cécile Bastard
Life of this patent
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Abstract
A multipulse elastography method for the quantitative measurement of at least one mechanical property of a viscoelastic medium having an ultrasonic signal after ultrasonic illumination, the method including defining characteristics of at least two mechanical pulses; generating the at least two mechanical pulses for which characteristics are defined in a viscoelastic medium; monitoring a propagation of at least two shear waves generated by the at least two mechanical pulses using acquisition and emission of ultrasonic signals, in the viscoelastic medium, and calculating at least one mechanical property of said viscoelastic medium using said acquisitions of said ultrasonic signals.
Claims15
A multipulse elastography method for quantitative measurement of at least one mechanical property of a viscoelastic medium having an ultrasonic signal after ultrasonic illumination, said method comprising:
- defining characteristics of at least two low-frequency mechanical pulses each having a central frequency comprised between 10 Hz and 5000 Hz, wherein at least the central frequency is different for each of the at least two low-frequency mechanical pulses, and wherein frequency bands of the at least two low-frequency mechanical pulses partially overlap;
- generating, in a viscoelastic medium, with a low-frequency vibration generator, said at least two low-frequency mechanical pulses for which the characteristics are defined;
- monitoring a propagation of at least two shear waves generated by said at least two low-frequency mechanical pulses using acquisition and emission of ultrasonic signals with at least one ultrasonic transducer that is distinct from said low-frequency vibration generator, in said viscoelastic medium, and
- calculating at least one mechanical property of said viscoelastic medium using said acquisitions of said ultrasonic signals.
A multipulse elastography method for quantitative measurement of at least one mechanical property of a viscoelastic medium having an ultrasonic signal after ultrasonic illumination, the method comprising:
- defining, via a human-machine interface, characteristics of at least two low-frequency mechanical pulses each having a central frequency comprised between 10 Hz and 5000 Hz, wherein at least the central frequency is different for each of the at least two low-frequency mechanical pulses, and wherein frequency bands of the at least two low-frequency mechanical pulses partially overlap;
- generating, in a viscoelastic medium, via a low-frequency vibration generator, the at least two low-frequency mechanical pulses in series for which the characteristics are defined;
- monitoring, via at least one ultrasonic transducer that is distinct from said low-frequency vibration generator, a propagation of at least two shear waves generated by the at least two low-frequency mechanical pulses using acquisition and emission of ultrasonic signals, in the viscoelastic medium, and
- calculating, via a computer, at least one mechanical property of the viscoelastic medium using the acquisition of the ultrasonic signals.
Dependencies are inferred from the claim text.