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Animal autopsy is a highly technical veterinary procedure, essential for regulatory and therapeutic purposes. IVAN is an innovative decision support tool, in the form of a WEB application, for veterinarians performing autopsies on cattle. IVAN uses artificial intelligence (AI) methods to assist the veterinarian. From general data on the animal, IVAN suggests a list of organs to focus on, looking for lesions that it can help identify. The suggestions at each stage of its reasoning are ranked according to their probability and submitted to the practitioner for validation. This makes the AI-guided process explicit for the user (no "black box" effect) and allows the veterinarian to control the entire diagnostic chain. The system then lists the morphological diagnoses likely to correspond to the lesions and finally proposes the possible diseases, always in order of probability. IVAN can also suggest additional tests to confirm the diagnosis. IVAN is a unique and powerful assistant that provides significant help to the veterinarian in the autopsy process. All the steps of these deductions are based on AI methods (Bayesian networks), trained by the data collected for several years by Autopsy Service at Oniris.

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