Search results for "Methodologie"
showing 10 items of 2141 documents
Expertise and Skill in Minimally Invasive Surgery
2009
New attitudes to medical ethics and demands for efficiency have brought increased attention to surgical skills and training. It is important to characterize the expertise and skill involved in the multidimensional surgical profession. At a time of change, there is a need to discuss the nature of surgical expertise, and also the prospects for resident training, with special reference to new minimally invasive techniques (MIS). In this paper, we selectively review knowledge on surgical expertise and the specific demands placed on a skilled MIS surgeon. In addition, the review contains a selection of studies from those areas that have been seen as important for the future of training in surge…
A Watermarking of Medical Image : New Approach Based On "Multi-Layer" Method
2011
In order to contribute to security sharing and transmission of medical images, this paper propose a new approach for Watermarking image based on the techniques of Code Division Multiple Access (CDMA), Discrete Wavelet transform (DWT) and Error Correcting Code (ECC). The motivation of this approach is to improve the quantity of data integration with the conservation of the image visual quality. Therefore, this work permits to the user the capacity to correct the possible alterations if it exists. IRM and Echographic medical image are used to experiment this approach.
Interpretation of Diagnostic Imaging for Medicolegal Issues
2019
Forensic radiology is a relative recently emergent part of forensic medicine characterized by the application of radiological methods in criminal investigations, such as the forensic M.E’s radiological reports in civil or penal matters for judicial technical advice. The various imaging modalities like X-rays, Computed Tomography (CT), Magnetic Resonance Imaging (MRI), and ultrasonography can be used depending on various forms of cases and their requirements in routine investigations.
Scalable multiscale density estimation
2014
Although Bayesian density estimation using discrete mixtures has good performance in modest dimensions, there is a lack of statistical and computational scalability to high-dimensional multivariate cases. To combat the curse of dimensionality, it is necessary to assume the data are concentrated near a lower-dimensional subspace. However, Bayesian methods for learning this subspace along with the density of the data scale poorly computationally. To solve this problem, we propose an empirical Bayes approach, which estimates a multiscale dictionary using geometric multiresolution analysis in a first stage. We use this dictionary within a multiscale mixture model, which allows uncertainty in co…
Photography as a historical source in the classroom. Assessment of a methodology for teaching History in Higher Education
2020
El presente artículo analiza una metodología activa centrada en el uso de fuentes históricas, en este caso la fotografía, para la enseñanza de la Historia en la Educación Superior. La propuesta analizada se llevó a cabo en la asignatura Didáctica de las Ciencias Sociales: Historia del Grado de Maestro en Educación Primaria de la Universidad de Alicante. Los datos obtenidos han sido tratados de forma cualitativa y han permitido conocer, además, la percepción del alumnado ante una nueva manera de trabajar contenidos históricos. Los resultados obtenidos confirman que la metodología que utiliza de forma adecuada la fotografía como fuente histórica incentiva el análisis y la reflexión sobre los …
A Tutorial on Computational Cluster Analysis with Applications to Pattern Discovery in Microarray Data
2008
Background Inferring cluster structure in microarray datasets is a fundamental task for the so-called -omic sciences. It is also a fundamental question in Statistics, Data Analysis and Classification, in particular with regard to the prediction of the number of clusters in a dataset, usually established via internal validation measures. Despite the wealth of internal measures available in the literature, new ones have been recently proposed, some of them specifically for microarray data. Results We consider five such measures: Clest, Consensus (Consensus Clustering), FOM (Figure of Merit), Gap (Gap Statistics) and ME (Model Explorer), in addition to the classic WCSS (Within Cluster Sum-of-S…
The burden of norovirus disease in children in the European Union.
2015
Supplemental Digital Content is available in the text.
Examining the utility of pinhole-type screens for lightfield display
2021
The use of microlens arrays for lightfield display has the drawback of providing images with strong chromatic aliasing. To overcome this problem, pinhole-type lightfield monitors are proposed. This paper is devoted to evaluating the capability for such lightfield monitors to offer the user a convincing 3D experience with images with enough brightness and continuous aspect. Thus, we have designed a psychophysical test specifically adapted for lightfield monitors, which allowed us to confirm the usability of pinhole-type monitors.
Time-multiplexing Integral Microscopy
2014
Conventional microscopes do not capture the 3D information of thick specimens. In order to avoid this limitation Integral Microscopy was proposed. An integral microscope is implemented by inserting a microlens array between the microscope objective and the camera sensor. Although this device captures multiperspective information of the specimen, the small number of microlenses limits the lateral resolution. In this paper we propose to improve the resolution by time multiplexing. Specifically, we propose an electrically addressable device that permits to obtain three sheared versions of the microscopic plenoptic map. Digital processing algorithm applied to the maps provides images with resol…
Confocal scanning microscope using a CCD camera as a pinhole-detector system
2011
We report a scheme for a detector system of confocal microscopes. In our scheme the pinhole and the large area detector are subtituted by a CCD camera. The numerical integration of the intensities acquired by the active pixels emulates the signal acquired by the detector. To demonstrate the utility of the system we efficiently performed an experiment of substractive-image confocal microscopy