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. 2013 Sep 25;8(9):e73939. doi: 10.1371/journal.pone.0073939

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© 2013 Zennaro et al

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Note: This extract from the training course in Portuguese, the national language in Angola, shows how to initiate the system (upper images), and how to choose functions to optimise X-ray visualisation (lower images).