Research team

Expertise

Shape and deformation measurements on mm and sub-mm scale and static and dynamic deformation and vibration measurements.

Sabbatical leave within the framework of biomedical physics. 01/10/2007 - 30/09/2008

Abstract

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    • Research Project

    Endoscopic moire topography. 01/05/2003 - 30/04/2005

    Abstract

    We will develop a new moire technique in which grid lines are projected by means of .an endoscopic imaging system. The projected grid lines are recorded through a second endoscope by a CCD camera. Digital image processing is used to calculate object shape and displacement from the recorded images. The technique will allow us to measure small objects in difficult positions. One of the possible applications may be the development of a new diagnostic technique in otology.

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    • Research Project

    Do three-dimensional motion components of the middle ear ossicles. in particular of the stapes, contribute to the effective stimulus to the inner ear? 01/05/2003 - 30/04/2005

    Abstract

    We have experimentally shown that de middle ear ossicles do not follow the widespread hypothesis of rotation about a fixed axis. The motion is clearly three-dimensional and strongly frequency dependent en serves most probably to widen the frequency-band of middle ear transmission. We want to study this mechanism by combining kinematical middle ear measurements with pressure measurements in the inner ear.

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      • Research Project

      BOF/IWT Research Fellowship. 01/02/2003 - 31/12/2003

      Abstract

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        • Research Project

        Laser Vibrometry Network: systems and applications (LAVINYA). 01/06/2002 - 31/05/2005

        Abstract

        Lavinya was a Thematic Network dealing with optical measuring techniques for shape and vibration measurements and was organised in the frame of the Fifth Framework Programme van de EU: Laser Vibrometry Network: Systems and apllications. The organisation resided at the Universita degli studi di Ancona.

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          • Research Project

          Physical parameters of the middle ear. 01/01/2002 - 31/12/2003

          Abstract

          By making use of high resolution techniques, important physical parameters of the middle ear will be defined. With confocal laser scanning microscopy and interferometry the thickness distribution of a tympanic membrane will be measured. 3D- structure and position of the middle ear ossicles will be studied with X-ray-microtomography. Integration of these new and accurate values in a finite element model will lead to a better insight in the action of the middle ear.

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            • Research Project

            Continuous monitoring of middle ear pressure 01/05/2000 - 30/04/2001

            Abstract

            A compact pressure registration is developed which will measure middle ear pressure over a period of at least 24 hours at a rate of 10 measurements per second, with a resolution better than 10 Pa, and which can record these data digitally. The new technique will allow us to map the pressure variations in the middle ear, and to better understand the function of the middle ear mechanics in pressure regulation.

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              • Research Project

              Realisation of a full-field vibrometer based on digital video techniques. 01/01/2000 - 31/12/2001

              Abstract

              Measurements of vibrations of small amplitude are often made using interferometric techniques such as holographic interferometry or laser-Doppler vibrometrie. Recently new techniques based on digital processing of high-resolution video images have been developed. These techniques demand for high computing power but require less costly equipment and present the advantage of providing full-field measurements,

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                • Research Project

                Physical parameters of the middle ear. 01/01/2000 - 31/12/2001

                Abstract

                By making use of high resolution techniques, important physical parameters of the middle ear will be defined. With confocal laser scanning microscopy and interferometry the thickness distribution of a tympanic membrane will be measured. 3D- structure and position of the middle ear ossicles will be studied with X-ray-microtomography. Integration of these new and accurate values in a finite element model will lead to a better insight in the action of the middle ear.

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                  • Research Project

                  Animations of the vibration in the middle and inner ear 01/01/2000 - 31/12/2001

                  Abstract

                  Sound reaching the ear causes very small vibrations of the middle ear (tympanic membrane, ossicles) and the inner ear structures (hair cells, basilair membrane). In a first study we have used approximate models for the middle ear ossicles. Now we want to include the measurement of the geometry of the experimental preparations with the new micromograph so that high fidelity models can be obtained. With special animation software we will animate the motionof the model.

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                    • Research Project

                    Projection Moiré interferometry for middle ear research. 01/05/1998 - 30/04/2000

                    Abstract

                    A projection Moiré interferometer will be built, which will allow high resolution 3D shape and deformation measurements in biomedical measuring conditions. Fast, automated calibration procedures are implemented. The technique is used to perform measurements on real middle ear specimens.

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                      • Research Project

                      Animations of vibrations in middle and inner ear 01/05/1997 - 30/04/1999

                      Abstract

                      Middle ear and inner ear structures perform minute virbrations. These vibrations are measured experimentally. This project involves the computer animation of these motions to gain a better insight in the hearing mechanism.

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                        • Research Project

                        High resolution projection Moiré interferometer. 01/05/1996 - 30/04/1998

                        Abstract

                        The possibility is checked to build a Moiré projection interferometer by means of which the tridimensional form and deformations of objects can be measured with high precision. The final goal is to reach beyond the limit of 1 micrometer depht-precision.

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                          • Research Project