Csem Centre Suisse D'electronique Et De Microtechnique Sa&#x2014;recherche Et D&#xe9;veloppement

Activcard Ireland Limited

Navix International Limited

Csem Centre Suisse D'electronique Et De Microtechnique Sa-recherche at Développement

Csem Sa

Andrew Adler

Josef X Brunner

Josep Sola I Caros

Shlomo Ben-Haim

Oleg Kuybeda

Eyal Madar

Martin Proença

Yehuda Landau

Damien Ferrario

Damien Farrario

Methods and systems of computing parameter values of one or more model parameters are described. The model models structural and dielectric properties of a structure in a human or an animal body. An exemplary method includes: accessing voltage measurements made at different places in the vicinity of the structure by one or more in-body field sensing electrodes in response to currents applied to one or more field supplying electrodes; and computing the parameter values by adjusting the parameter values to fit predicted voltage values to the accessed voltage measurements, wherein the predicted voltage values are predicted from the model for the currents applied to the field supplying in-body electrodes.

Modelling a structure in a body

A method for estimating blood pressure (BP) values comprises: measuring at a first PTT value, a second PTT value, and further PTTref values using a method comprising measuring a first arterial pressure pulse arrival time (PAT) and measuring a second PAT value; calculating a PTT value from the difference between the first PAT value and the second PAT value; processing a sequence of electrical impedance tomography (EIT) images to identify at least one region of interest (ROI); and estimating at least one of the first and second PAT value from the variation of impedance value determined from the at least one ROI. The method allows for the non-invasive and continuous determination of the PB values by using a calibration factor.

Method and apparatus for the non-invasive measurement of pulse transit times (PTT)

A method and apparatus for measuring a pulse transit time (PTT) value of a subject, comprise measuring a first arterial pressure pulse arrival time (PAT) and measuring a second PAT value; calculating a PTT value from the difference between the first PAT value and the second PAT value; processing a sequence of electrical impedance tomography (EIT) images to identify at least one region of interest (ROI); and estimating at least one of the first and second PAT value from the variation of impedance value determined from the at least one ROI. The method allows for the non-invasive and continuous measurement of the PTT value and arterial blood pressures.

An optical imaging device such as a fingerprint imager is disclosed that has an optical modification to reduce perspective distortion in a read image. The optical modification is a contoured lens, a contoured platen recess, a contoured output port, or a contoured reflective surface that compensates for perspective distortion. The optical modification is provided by a complex optical surface and is distinct for a uniformly planar, spherical or cylindrical lens. In addition, a method for determining a perspective distortion correction is disclosed.

Corrective optical component

Growing community of inventors

Ottawa, Canada

Andrew Adler