The use of mobile and ubiquitous computing devices is advantageous for collecting and sharing patient data at the bedside or in hospital waiting areas. iPhone web applicationsor web apps -combine the power of Internet based solutions with the simplicity of multi-touch and gesture technology, all one portable device. Since many data collection platforms have moved to an online paradigm (or are in the process of doing so), a web app is an ideal solution. In this work, we show the advantages of using a web app for patient data collection, as an imaging engine, and for patient feedback and survey systems. This can be achieved by taking advantage of simple functions available on the iPhone OS when using an online collection platform.

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Accurate delineation of object borders is highly desirable in echocardiography, especially at the left ventricle. Among other modelbased techniques, active contours (or snakes) provide a unique and powerful approach to image analysis. In this work, we propose the use of a new external energy for a gradient vector flow (GVF) snake, being the optical flow of a moving sequence (modeling the mechanical movement of the heart). This external energy can provide additional information to the active contour model garnering adequate results for moving sequences. An automatic iterative primitive shape prior was also applied in order to further improve the results of a GVF snake, when dealing with especially noisy echocardiographic images. Results were compared with expert-defined segmentations yielding acceptable sensitivity, precision rate and overlap ratio performance.

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Background Detailed epidemiology for patients with advanced metastatic melanoma in Canada is not well