摘要:
The present invention relates to an elastography device to obtain a signal representative of variations of a mechanical property of a region of a body of a subject with time, the elastography device comprising an electronic unit adapted to determine, at a repetition rate of at least 4 measurements per second and for a duration of at least 1 second, measurements of the mechanical property, each measurement of the mechanical property being associated with a respective time, wherein the signal representative of the variations of the mechanical property with time comprises a plurality of the measurements of the mechanical property determined.
摘要:
An elastography device includes a probe with a single ultrasound transducer (6); or a plurality of ultrasound transducers, and a low frequency vibrator (5) arranged to induce a displacement of said single ultrasound transducer or plurality of ultrasound transducers towards a tissue (8). The device is configured to emit a sequence of ultrasound pulses and to acquire echo signals received in response to track how elastic waves, induced by the displacement, travel in the tissue. The device is configured to generate, for one or more of the ultrasound pulses emitted a temporal offset upon emission (δt TX ), and/or a temporal offset upon reception (δt RX ), so that a difference thereof varies as a function of 2. d /v us , where d is the displacement of the single transducer or plurality of ultrasound transducers, and where vus is the speed of ultrasound in said tissue.
摘要:
A probe (1) for transient elastography comprising a probe casing (PC), at least one ultrasound transducer (US) having a symmetry axis (A), at least a vibrator (VIB), said vibrator (VIB) being located inside the probe casing (PC); the probe (1) being characterized in that the vibrator (VIB) is arranged to induce a movement of the probe casing (PC) along a predefined axis, the predefined axis being the symmetry axis (A) of the ultrasound transducer (US) and the ultrasound transducer is bound to the probe casing (PC) with no motion of the ultrasound transducer (US) with respect to the probe casing (PC).
摘要:
The invention relates to a method (100) for determining, in real time, the probability that target biological tissue is opposite an ultrasonic transducer, said method (100) comprising the following steps: transmitting (101), via an ultrasonic transducer, an ultrasonic signal into biological tissue; said ultrasonic transducer receiving (102) said transmitted ultrasonic signal which has been backscattered by said biological tissue; calculating (103) at least two instantaneous parameters E, LIN, ATT of said backscattered ultrasonic signal; calculating (104) a predictive value P of the presence of an acoustic signature of target biological tissue, said predictive value P being calculated via a statistical law using said at least two calculated instantaneous parameters E, LIN, ATT; estimating (105) the probability that said target biological tissue is opposite said ultrasonic transducer, said estimation (105) depending on said calculated predictive value P and/or on at least one strength condition based on at least one of said two calculated instantaneous parameters E, LIN, ATT.