Browsing by Author "Pérez Rocano, Wilson Rodrigo"

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An automatic method for the enrichment of DICOM metadata using biomedical ontologies
(INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS INC., 2015-08-25) Pérez Rocano, Wilson Rodrigo; La Cruz Puente Alexandra; Saquicela Galarza, Víctor Hugo; Tello Guerrero, Marco Andrés
This work is a novel contribution for enriching medical images using semantic annotations with a strategy for unifying different ontologies and instances of DICOM medical files. We present the L-MOM library (Library for Mapping of Ontological Metadata) as a tool for making an automatic mapping between instances of DICOM medical files and different medical ontologies (e.g., FMA, RadLex, MeSH). The main contributions are: i) the domain independent L-MOM library which is able to integrate DICOM metadata with ontologies from different domains; ii) a strategy to automatically annotate DICOM data with universally accepted medical ontologies, and provide values of similarity between ontologies and DICOM metadata; and iii) a framework to traverse ontological concepts that characterized clinical studies of patients registered in the framework catalog.
Data warehouse para el Centro de Documentación Regional "Juan Bautista Vázquez"
(2014) Haro Valle, Valeria Alexandra; Pérez Rocano, Wilson Rodrigo; Saquicela Galarza, Víctor Hugo
The decision-making process in academic libraries is paramount; however highlycomplicated due to the large number of data sources, processes and high volumes ofdata to be analyzed. Academic libraries are accustomed to producing and gatheringa vast amount of statistics about their collection and services. Typical data sourcesinclude integrated library systems, library portals and online catalogues, and systemsof consortiums and quality surveys. Unfortunately, these heterogeneous datasources are only partially used for decision-making processes due to the wide varietyof formats, standards and technologies, as well as the lack of efficient methods ofintegration. This thesis presents the analysis, design and implement of Data Warehousefor an academic library Juan Bautista Vázquez". Firstly, an appropriatemethodology documented in a previous study is used for data collection. This methodology incorporates key elements including process analysis, quality estimation, information relevance and user interaction that may influence a library decision. Based on the above mentioned approach, this study defines a set of queries of interestto be issued against the integrated system proposed. Then, relevant data sources,formats and connectivity requirements for a particular example are identified. Next,Data Warehouse architecture is proposed to integrate, process, and store the collecteddata transparently. Eventually, the stored data are analyzed through reportingtechniques of analytical processing and prototype of Bibliomining. By doing so, thethesis provides the design of an integrated solution that assists library managers tomake tactical decisions about the optimal use and leverage of their resources and ofservices.
Diseño e implementación de un sistema de soporte de decisiones para el Centro de Documentación Regional “Juan Bautista Vázquez”
(Universidad de Cuenca, 2014) Haro Valle, Valeria Alexandra; Pérez Rocano, Wilson Rodrigo; Sigüenza Guzmán, Lorena Catalina; Cattrysse, Dirk; Saquicela Galarza, Víctor Hugo; Universidad de Cuenca; Dirección de Investigación de la Universidad de Cuenca; DIUC
In recent years, volume of library-related data has increased tremendously, as well as complexity of data sources and formats have been escalating. This information explosion has created a big challenge for data managing, archiving and accessing, especially in support of library decision-making. Knowing that a good library management involves integrating a number of strategic indicators, the implementation of a Data Warehouse (DW), that properly manages such amount of information and the complex mix of data sources, becomes an interesting alternative to be considered. This article describes the design and implementation of a decision support system based on a DW approach for the Regional Documentation Centre “Juan Bautista Vazquez”. To assure that all relevant data sources are included during the data analysis, the study utilizes a holistic methodology, previously proposed by Siguenza-Guzman et al. (2014) for an integrated library evaluation. This methodology assesses the library collection and services by incorporating important elements for library management, such as service performance analysis, service quality control, collection usage analysis, and information retrieval quality. Based on this data analysis, the study proposes a DW architecture to integrate, process and store the relevant data. These stored data are finally analyzed and visualized by the so-called online analytical processing (OLAP) tools. Initial tests of the implemented decision support system confirm the feasibility and effectiveness of the DW based approach, by successfully integrating multiple and heterogeneous sources, formats and varieties of information, permitting library managers to generate personalized reports, and even allowing to debug the day-to-day transactional processes.
Grid platform for medical federated queries supporting semantic and visual annotations
(SPIE, 2015-11-17) Gualan Saavedra, Ronald Marcelo; Guillermo Anguisaca, Juan Carlos; La Cruz Puente Alexandra; Pérez Rocano, Wilson Rodrigo; Solano Quinde, Lizandro Damián
Grid computing has been successfully applied on teleradiology, leading to the creation of important platforms such as MEDICUS, VirtualPACS and mantisGRID, among others. These platforms are studied on the basis of their available documentation in order to compare and discuss differences and similarities, advantages and disadvantages between them. Then, a grid platform architecture is proposed, based on the best features of the surveyed platforms with an additional emphasis on general federated queries involving CBIR (Content-Based Image Retrieval) and Semantic Annotations.
Mobile teleradiology system suitable for m-health services supporting content and semantic based image retrieval on a grid infrastructure
(INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS INC., 2016-08-16) La Cruz Puente Alexandra; Espinoza Mejía, Jorge Mauricio; Medina Molina, Ruben; Pérez Rocano, Wilson Rodrigo; Saquicela Galarza, Víctor Hugo; Solano Quinde, Lizandro Damián; Vega, F; Vidal, M.-E
Teleradiology systems tackle the problem of transferring radiological images between medical image workstations for facilitating different medical activities, e.g., diagnosis, treatment and follow up a patient, medical training, or consulting second opinion. Nowadays, m-Health (aka mobile health) is becoming popular because of high quality of mobile displays, although remains a work in progress. In this paper a mobile teleradiology system is reported, which main contribution is the development of a platform: (1) supported by a Grid infrastructure, (2) using biomedical ontologies for adding semantic annotations on medical images, and (3) supporting semantic and content-based image retrieval. Images are located physically in different repositories like; hospitals and diagnostic imaging centers. All these features make the system ubiquitous, portable, and suitable for m-Health services.
WebMedSA: A web-based framework for segmenting and annotating medical images using biomedical ontologies
(SPIE, 2015-11-17) Vega, F; Espinoza Mejía, Jorge Mauricio; La Cruz Puente Alexandra; Pérez Rocano, Wilson Rodrigo; Saquicela Galarza, Víctor Hugo; Solano Quinde, Lizandro Damián; Tello Guerrero, Marco Andrés
Advances in medical imaging have fostered medical diagnosis based on digital images. Consequently, the number of studies by medical images diagnosis increases, thus, collaborative work and tele-radiology systems are required to effectively scale up to this diagnosis trend. We tackle the problem of the collaborative access of medical images, and present WebMedSA, a framework to manage large datasets of medical images. WebMedSA relies on a PACS and supports the ontological annotation, as well as segmentation and visualization of the images based on their semantic description. Ontological annotations can be performed directly on the volumetric image or at different image planes (e.g., axial, coronal, or sagittal); furthermore, annotations can be complemented after applying a segmentation technique. WebMedSA is based on three main steps: (1) RDF-ization process for extracting, anonymizing, and serializing metadata comprised in DICOM medical images into RDF/XML; (2) Integration of different biomedical ontologies (using L-MOM library), making this approach ontology independent; and (3) segmentation and visualization of annotated data which is further used to generate new annotations according to expert knowledge, and validation. Initial user evaluations suggest that WebMedSA facilitates the exchange of knowledge between radiologists, and provides the basis for collaborative work among them.