David Savery
David Savery, Aix-En-Provence FR
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20110092817 | METHOD AND SYSTEM OF ULTRASOUND SCATTERER CHARACTERIZATION - A method for characterizing ultrasound scatterers in a medium comprising providing ultrasound data representing a region of interest comprising a plurality of scatterers in a medium, the plurality of scatterers including clusters of scatterer sub-units, the scatterers having a physical property value to be estimated and the scatterer sub-units having at least one known physical parameter value; modelling the ultrasound data using an at least second order function of a spatial organization parameter defining the spatial organization of the scatterers; and estimating the physical property value of the scatterers from the modelled ultrasound data and the at least one known physical parameter of the sub-units by a regression of the spatial organization parameter as a function of frequency. A system for characterizing ultrasound scatterers is also included. | 04-21-2011 |
David Savery, Calas-Cabries FR
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20100170342 | Method for Rheological Characterization of a Viscoelastic Medium - Method for rheological characterization of a viscoelastic medium, comprising the following steps: (a) an excitation step during which a vibratory excitation is generated in the viscoelastic medium leading to a deformation of the medium, (b) a deformation measurement step during which the deformation of the medium caused by the excitation is observed, (c) and a characterization step during which at least one non-zero power parameter y is determined such that a rheological parameter of the medium x is equal to x (f)=a+b.f | 07-08-2010 |
20100222678 | METHOD AND DEVICE FOR MEASURING A MEAN VALUE OF VISCO-ELASTICITY OF A REGION OF INTEREST - The invention relates to a method for measuring a mean visco-elasticity value for a soft material. Said method using a single probe carrying at least one transducer comprises the steps of: | 09-02-2010 |
20140081138 | METHOD AND DEVICE FOR MEASURING A MEAN VALUE OF VISCO-ELASTICITY OF A REGION OF INTEREST - The invention relates to a method for measuring a mean visco-elasticity value for a soft material. Said method using a single probe carrying at least one transducer comprises the steps of: | 03-20-2014 |
David Savery, Cabries FR
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20080276709 | Method for Generation Mechanical Waves by Generation of Interfacial Acoustic Radiation Force - The present invention relates to a method for generating mechanical waves within a viscoelastic medium ( | 11-13-2008 |
20100168566 | METHOD AND A DEVICE FOR IMAGING A VISCO-ELASTIC MEDIUM - The invention relates to a method and a device for imaging a visco-elastic medium. The method comprises an excitation step during which an internal mechanical stress is generated in excitation zone and an imaging step of acquiring signals during the movements generated by the mechanical stress in the visco-elastic medium in response to the internal mechanical stress in an imaging zone that includes the excitation zone. According to the invention, the method further comprises a step of calculating a quantitative index associated with the rheological properties of the visco-elastic medium at at least one point of the imaging zone situated at a given depth outside the excitation zone. The quantitative index is representative of a comparison between signals acquired during the movements generated in response to the mechanical stress at at least one point of the excitation zone situated at the given depth, and signals acquired during the movements generated in response to the mechanical stress at at least the point of the imaging zone situated outside the excitation zone. | 07-01-2010 |
David Savery, Calries FR
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20100043557 | ULTRASONIC DETERMINATION OF OPTICAL ABSORPTION COEFFICIENTS - The invention relates to an examination apparatus and a method for the determination of optical coefficients, particularly of the optical absorption coefficient (μa) in an object ( | 02-25-2010 |
20100168571 | IMAGE-BASED POWER FEEDBACK FOR OPTIMAL ULTRASOUND IMAGING OR RADIO FREQUENCY TISSUE ABLATION - Methods and systems are provided for monitoring and regulating radiofrequency (RF) ablation therapy to improve quality of ultrasound imaging. Feedback is provided from real-time ultrasound imaging, and RF power is altered in response to a feedback signal to improve image quality. | 07-01-2010 |
David Savery, Calas FR
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20090312637 | ULTRASOUND MONITORING AND FEEDBACK FOR MAGNETIC HYPERTHERMIA - A method and system of magnetic hyperthermia control using ultrasound thermometry, the method comprising: acquiring a reference set of ultrasound data corresponding to a tissue of interest ( | 12-17-2009 |