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Summary form only given. In Reverse Engineering, the result of surface reconstruction of the scanned objects can neither be recognized nor used for further analysis using the existing CAD system. The surface model needs to be transformed into a CAD model. Generally, conversion of a surface model is done through feature recognition process. For symmetrical shapes of mechanical components such as block,...
In the recent medical fields, multimodal imaging is considered to be important technique for improving diagnostic accuracy. We have developed integrated DOI-PET and MRI system which can simultaneously acquire PET and MRI data. The system consists of 0.3 T permanent magnet open MRI scanner with light-guide based PET insert. The system has axial and transaxial field of view of 80 mm. In order to improve...
Tissues formed by cells seeded in hydrogels are used for biotechnology, cell-based assays, and tissue engineering. We have previously presented a cell-micropatterning technique that localizes live cells within hydrogels using dielectrophoretic (DEP) forces, and have demonstrated the ability to modulate tissue function through the control of microscale cell architecture. In this study, we developed...
Accurate patient setup is essential in high-precision radiotherapy because deviations in delivered beam geometry may result in decreasing tumor control and increasing complications of adjacent normal tissue. At a majority of clinical facilities, radiation oncologists verify the patient setup by visual comparison in spite of it lacks reproducibility and quantitativity during the radiation treatment...
The pivot shift test has been performed to assess the instability of the knee caused by anterior cruciate ligament (ACL) injuries. However, the test depends on the clinician's subjective feeling. In this study, inertial and magnetic sensors have been introduced into quantitative evaluation of the pivot shift test. The analysis method extracts the knee movement of the pivot shift by using wavelet transformation...
In this paper, we describe about design and fabrication of a piezoelectric gyroscope with a trident tuning fork structure for MEMS processes. The PZT thin film on the silicon beam was used for driving source and detection. We obtained the PZT thin film with thickness of 3um by the sputtered. The report describes a design of the gyroscope and characteristics of the PZT thin film.
Most computer-aided diagnosis systems for Alzheimer's disease (AD) using magnetic resonance (MR) imaging were based on morphological image features, not functional image features, which would be also useful for diagnosis of AD. The aim of this study was to develop a computer-aided classification system for AD patients based on functional image features derived from the cerebral blood flow (CBF) maps...
The realization of minimally invasive epilepsy surgery treatment, our goal, needs not only the localization of epileptic focus exactly and also the excision of the focus accurately by minimally invasive way. We think one of the best ways is cryosurgery. Cryosurgery is used to excise cancer of liver and kidney tumor as minimally invasive surgery. However, cryosurgery is not applied to epilepsy and...
This paper is reports a concept of MEMS-RLG and observation of an winking phenomenon using a trial model device using an SOA as the light source. The MEMS-RLG involves some fabrication errors. To compensate them, we designed movable optical parts. In addition, external oscillation of an SOA and a winking phenomenon which is important to sense an angular velocity of RLGs are confirmed.
Fuzzy clustering has also been applied to object recognition with certain shapes in image processing. This paper proposes a new approach to grid-like cluster extraction, in which gridlike structures are extracted by extended fuzzy c-lines with local coordinate rotation. In the prototype recognition step, four sides of squares are captured in a similar procedure for linear fuzzy clustering after cluster-wise...
We propose a method for recursively estimating the parameters of a numerical simulation model for pedestrian motion using an image sequence. We construct the model with socalled social forces, which have been successfully used in computer simulations for pedestrian motion analysis. The contribution of this paper is to combine the numerical simulation model and observations captured from image sequences...
Hemodynamics is believed to play a vital role in the initiation of cerebral aneurysms. In this study, we describe a newly defined hemodynamic quantity, the gradient oscillatory number (GON), as an index for the cerebral aneurysm initiation. It is defined by temporal variations of flow-induced tension/compression forces acting on endothelial cells. We calculated the index for the arterial geometry...
Currently, total knee arthroplasty (TKA) is performed over 40000 for the year, in Japan. The number of cases has been increasing even now. In the TKA, it is one of the most important issues to alignment a balance of a force given by the soft-tissue surrounding the knee joint, because it effects a clinical outcome after surgery. However, the force is subjectively observed by surgeon due to no device...
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