SUPERSONIC IMAGINE

An ultrasound characterisation method of a medium comprising the steps of generating a series of incident ultrasound waves, measuring a canonical reflection matrix defined between the input emission base and an output reception base, determining a set of responses of the medium obtained from the canonical reflection matrix, at a plurality of frequencies and for several points in a region around a reference point, determination of a frequency correction law from the responses of the medium at the various points, the frequency correction law being adapted to the reference point and being determined at frequencies, determination of the corrected responses of the medium by applying the frequency correction law to the responses of the medium around the reference point and for the plurality of frequencies.

Method for ultrasonic characterization of a medium, comprising a step of generating a series of incident ultrasonic waves, a step of generating an experimental reflection matrix R ui (t) defined between the emission basis (i) as input and a reception basis (u) as output, a step of determining a focused reflection matrix RFoc(r in , r out , δt) of the medium between an input virtual transducer (TV in ) calculated based on a focusing as input to the experimental reflection matrix and an output virtual transducer (TV out ) calculated based on a focusing as output from the experimental reflection matrix, the responses of the output virtual transducer (TV out ) being obtained at a time instant that is shifted by an additional delay δt relative to a time instant of the responses of the input virtual transducer (TV in ).

An ultrasound characterisation method of a medium comprising the steps of generating a series of incident ultrasound waves, measuring a canonical reflection matrix defined between the input emission base and an output reception base, determining a set of responses of the medium obtained from the canonical reflection matrix, at a plurality of frequencies and for several points in a region around a reference point, determination of a frequency correction law from the responses of the medium at the various points, the frequency correction law being adapted to the reference point and being determined at frequencies, determination of the corrected responses of the medium by applying the frequency correction law to the responses of the medium around the reference point and for the plurality of frequencies.

The invention relates to a system for providing a medical device, the system including a mounting structure arranged adjacent to and/or at least partially above an access space where an object to be accessed by the medical device can be placed, a holding device retained by the mounting structure and configured to hold the medical device at a changeable position above the access space, wherein the holding device is configured such that the medical device is moved from a retracted position to a first extended position upon a first predefined event.

This disclosure relates to a method for characterising a target object in a medium. The method comprises: obtaining a reference matrix F(q) associated with the target object, measuring a reflection matrix R associated with the probed medium, and projecting the reflection matrix R onto the reference matrix F(q) to estimate a probability P(q) that the object is in a state q.

An ultrasound characterisation method of a medium comprising the steps of generating a series of incident ultrasound waves, measuring a canonical reflection matrix defined between the input emission base and an output reception base, determining a set of responses of the medium obtained from the canonical reflection matrix, at a plurality of frequencies and for several points in a region around a reference point, determination of a frequency correction law from the responses of the medium at the various points, the frequency correction law being adapted to the reference point and being determined at frequencies, determination of the corrected responses of the medium by applying the frequency correction law to the responses of the medium around the reference point and for the plurality of frequencies.

A medical diagnostic imaging system and method for adjusting image gain compensation when changing from a first imaging state to a second imaging state, where a first image power value is determined from an image acquired in a first imaging state with a first image gain compensation, a second image power value is determined from an image acquired in a second imaging state with an initial second image gain compensation, an image power change value is determined from the first image power value and the second image power value, and an adjusted second image gain compensation calculated from the initial second image gain compensation and the image power change value.

A shear wave elastography method for imaging an observation field in an anisotropic medium, including an initial ultrasonic acquisition step during which initial physical parameters are acquired in at least one region of interest; a spatial characterization step during which a set of spatial characteristics of the anisotropic medium is determined on the basis of the initial physical parameter; an excitation substep during which an shear wave is generated inside the anisotropic medium on the basis of the set of spatial characteristics; and an observation substep during which the propagation of the shear wave is observed simultaneously at a multitude of points in the observation field.

Examples of this disclosure include a medical imaging system having a control module, a foldable touchscreen with at least a first touchscreen section and a second touchscreen section extending from the first section and being tiltable relative to the first section. The control module has a watertight surface resistant to liquids and configured to be cleanable by disinfectant liquid on the first and second sections, and between the two sections. Other examples include a method for medical imaging that includes displaying a first image generated by the imaging system on the third section of the system, duplicating the first image, displaying the first duplicated image on at least one of the first section and the second section such that a user can at least one of mark an area on the latter and have annotation options, and in response, processing the first image using a predefined algorithm.

An ultrasonic method for quantifying the nonlinear shear wave elasticity of a medium, the method comprising the following steps: A1.—collecting a temporal succession of shear wave elasticity data from the medium, A2.—applying, to the medium, a deformation that successively changes according to a predetermined sequence of deformations, during the collection of the shear waves, A3.—observing the actual evolution of deformation, and B.—quantifying the nonlinear elasticity of the medium depending on the temporal succession of data and the evolution of deformation.