9,908 research outputs found

    Professional Liability Insurers as Regulators of Law Practice

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    Predictive Modelling of Bone Age through Classification and Regression of Bone Shapes

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    Bone age assessment is a task performed daily in hospitals worldwide. This involves a clinician estimating the age of a patient from a radiograph of the non-dominant hand. Our approach to automated bone age assessment is to modularise the algorithm into the following three stages: segment and verify hand outline; segment and verify bones; use the bone outlines to construct models of age. In this paper we address the final question: given outlines of bones, can we learn how to predict the bone age of the patient? We examine two alternative approaches. Firstly, we attempt to train classifiers on individual bones to predict the bone stage categories commonly used in bone ageing. Secondly, we construct regression models to directly predict patient age. We demonstrate that models built on summary features of the bone outline perform better than those built using the one dimensional representation of the outline, and also do at least as well as other automated systems. We show that models constructed on just three bones are as accurate at predicting age as expert human assessors using the standard technique. We also demonstrate the utility of the model by quantifying the importance of ethnicity and sex on age development. Our conclusion is that the feature based system of separating the image processing from the age modelling is the best approach for automated bone ageing, since it offers flexibility and transparency and produces accurate estimate

    Health Care Opinion Leaders' Views on Health Care Delivery System Reform

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    Presents findings of a survey of experts on reforming delivery systems -- organized delivery systems, patient-centered medical homes, and retail clinics -- and recommended policy strategies, such as improving the primary care system

    Health Care Opinion Leaders' Views on the Transparency of Health Care Quality and Price Information in the United States

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    Presents findings from a survey of experts on collecting and reporting public information on the quality and price of healthcare services; the role of transparency in improving quality, efficiency, and cost-effectiveness; and obstacles

    Health Care Opinion Leaders' Views on the Quality and Safety of Health Care in the United States

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    Presents findings from an annual survey of a diverse group of experts on strategies to improve the quality and safety of health care in the United States
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