16,708 research outputs found

    A Framework for XML-based Integration of Data, Visualization and Analysis in a Biomedical Domain

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    Biomedical data are becoming increasingly complex and heterogeneous in nature. The data are stored in distributed information systems, using a variety of data models, and are processed by increasingly more complex tools that analyze and visualize them. We present in this paper our framework for integrating biomedical research data and tools into a unique Web front end. Our framework is applied to the University of Washington’s Human Brain Project. Specifically, we present solutions to four integration tasks: definition of complex mappings from relational sources to XML, distributed XQuery processing, generation of heterogeneous output formats, and the integration of heterogeneous data visualization and analysis tools

    A semi-automatic semantic method for mapping SNOMED CT concepts to VCM Icons

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    VCM (Visualization of Concept in Medicine) is an iconic language for representing key medical concepts by icons. However, the use of this language with reference terminologies, such as SNOMED CT, will require the mapping of its icons to the terms of these terminologies. Here, we present and evaluate a semi-automatic semantic method for the mapping of SNOMED CT concepts to VCM icons. Both SNOMED CT and VCM are compositional in nature; SNOMED CT is expressed in description logic and VCM semantics are formalized in an OWL ontology. The proposed method involves the manual mapping of a limited number of underlying concepts from the VCM ontology, followed by automatic generation of the rest of the mapping. We applied this method to the clinical findings of the SNOMED CT CORE subset, and 100 randomly-selected mappings were evaluated by three experts. The results obtained were promising, with 82 of the SNOMED CT concepts correctly linked to VCM icons according to the experts. Most of the errors were easy to fix

    Segmentation-by-Detection: A Cascade Network for Volumetric Medical Image Segmentation

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    We propose an attention mechanism for 3D medical image segmentation. The method, named segmentation-by-detection, is a cascade of a detection module followed by a segmentation module. The detection module enables a region of interest to come to attention and produces a set of object region candidates which are further used as an attention model. Rather than dealing with the entire volume, the segmentation module distills the information from the potential region. This scheme is an efficient solution for volumetric data as it reduces the influence of the surrounding noise which is especially important for medical data with low signal-to-noise ratio. Experimental results on 3D ultrasound data of the femoral head shows superiority of the proposed method when compared with a standard fully convolutional network like the U-Net

    Double-Row Repair Technique for Bursal-Sided Partial-Thickness Rotator Cuff Tears

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    Rotator cuff pathology is a common cause of shoulder pain in the athletic and general population. Partial-thickness rotator cuff tears (PTRCT) are commonly encountered and can be bursal-sided, articular-sided, or intratendinous. Various techniques exist for the repair of bursal-sided PTRCTs. The 2 main distinctions when addressing these lesions include tear completion versus preservation of the intact fibers, and single- versus double-row suture anchor fixation. We present our method for addressing bursal-sided PTRCTs using an in situ repair technique with double-row suture anchors. © 2017 Arthroscopy Association of North Americ

    Religious Racial Formation Theory and its Metaphysics

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    While the intersection between race and religion has been an important site for research for the sociology of religion and religious studies (in its descriptive dimensions) as well s theology (in its religiously normative dimensions), neither of these disciplines has incorporated recent work in the analytic philosophy of race. Analytic philosophy of race, for its part, has largely neglected the race/religion intersection, while analytic theologians by and large ignore the theological significance of race altogether. In this paper I am to draw together these distinct disciplinary contributions—social-historical, philosophical and normative-theological—into a single integrated framework for a research program in analytic theology. I call that framework “religious racial formation theory,” and I claim that the work of specifying a determinate religious racial formation theory is not merely a (normatively driven) sociological and historical task but a necessarily philosophical one. I then detail what sorts of metaphysical determinations are required in order to yield an adequate explanation of the intersection uncovered by the socio-historical data summarized in the first section

    Implantable micromechanical parylene-based pressure sensors for unpowered intraocular pressure sensing

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    This paper presents the first implantable, unpowered, parylene-based microelectromechanical system (MEMS) pressure sensor for intraocular pressure (IOP) sensing. From in situ mechanical deformation of the compliant spiral-tube structures, this sensor registers pressure variations without electrical or powered signal transduction of any kind. Micromachined high-aspect-ratio polymeric hollow tubes with different geometric layouts are implemented to obtain high-sensitivity pressure responses. An integrated device packaging method has been developed toward enabling minimally invasive suture-less needle-based implantation of the device. Both in vitro and ex vivo device characterizations have successfully demonstrated mmHg resolution of the pressure responses. In vivo animal experiments have also been conducted to verify the biocompatibility and functionality of the implant fixation method inside the eye. Using the proposed implantation scheme, the pressure response of the implant can be directly observed from outside the eye under visible light, with the goal of realizing convenient, direct and faithful IOP monitoring in glaucoma patients

    A Lucky Mistake: The Splenic Glands of Marcello Malpighi

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    PURPOSE OF THE REVIEW: More than 50% of all gynaecological cancers can be classified as rare tumours (defined as an annual incidence of <6 per 100,000) and such tumours represent an important challenge for clinicians. RECENT FINDINGS: Rare cancers account for more than one fifth of all new cancer diagnoses, more than any of the single common cancers alone. Reviewing the RARECAREnet database, some of the tumours occur infrequently, whilst others because of their natural history have a high prevalence, and therefore appear to be more common, although their incidence is also rare. Harmonization of medical practice, guidelines and novel trials are needed to identify rare tumours and facilitate the development of new treatments. Ovarian tumours are the focus of this review, but we comment on other rare gynaecological tumours, as the diagnosis and treatment challenges faced are similar. FUTURE: This requires European collaboration, international partnerships, harmonization of treatment and collaboration to overcome the regulatory barriers to conduct international trials. Whilst randomized trials can be done in many tumour types, there are some for which conducting even single arm studies may be challenging. For these tumours alternative study designs, robust collection of data through national registries and audits could lead to improvements in the treatment of rare tumours. In addition, concentring the care of patients with rare tumours into a limited number of centres will help to build expertise, facilitate trials and improve outcomes
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