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.
Endoscopic moire topography.
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.Researcher(s)
- Promoter: Dirckx Joris
- Co-promoter: Decraemer Wim
Research team(s)
Project type(s)
- 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?
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.Researcher(s)
- Promoter: Decraemer Wim
- Co-promoter: Dirckx Joris
Research team(s)
Project type(s)
- Research Project
BOF/IWT Research Fellowship.
Abstract
Researcher(s)
- Promoter: Decraemer Wim
- Fellow: Gea Stefan
Research team(s)
Project type(s)
- Research Project
Laser Vibrometry Network: systems and applications (LAVINYA).
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.Researcher(s)
- Promoter: Decraemer Wim
Research team(s)
Project type(s)
- Research Project
Physical parameters of the middle ear.
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.Researcher(s)
- Promoter: Decraemer Wim
- Fellow: Kuypers Liesbeth
Research team(s)
Project type(s)
- Research Project
Continuous monitoring of middle ear pressure
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.Researcher(s)
- Promoter: Dirckx Joris
- Co-promoter: Decraemer Wim
Research team(s)
Project type(s)
- Research Project
Realisation of a full-field vibrometer based on digital video techniques.
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,Researcher(s)
- Promoter: Decraemer Wim
- Co-promoter: Dirckx Joris
Research team(s)
Project type(s)
- Research Project
Physical parameters of the middle ear.
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.Researcher(s)
- Promoter: Decraemer Wim
- Fellow: Kuypers Liesbeth
Research team(s)
Project type(s)
- Research Project
Animations of the vibration in the middle and inner ear
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.Researcher(s)
- Promoter: Decraemer Wim
- Co-promoter: Dirckx Joris
Research team(s)
Project type(s)
- Research Project
Projection Moiré interferometry for middle ear research.
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.Researcher(s)
- Promoter: Dirckx Joris
- Co-promoter: Decraemer Wim
Research team(s)
Project type(s)
- Research Project
Animations of vibrations in middle and inner ear
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.Researcher(s)
- Promoter: Decraemer Wim
- Co-promoter: Dirckx Joris
Research team(s)
Project type(s)
- Research Project
High resolution projection Moiré interferometer.
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.Researcher(s)
- Promoter: Dirckx Joris
- Co-promoter: Decraemer Wim
Research team(s)
Project type(s)
- Research Project