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. 2013 Jun 14;13:2. doi: 10.1186/1756-6649-13-2

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Copyright © 2013 Tilly et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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The virtual patient and its deformation. The patient position and the coordinate system are indicated in the top left corner. (a) 3D view of the virtual patient with the centre of the CTV at the origin. The black arrows indicate the direction of the two incident scanned proton beams. (b) A slice at x = 0.0 cm of the virtual patient in which the prostate CTV has moved 0.5 cm versus the reference in (a) in the negative y-direction (Anterior-Posterior) causing an intrusion into the bladder and an expansion of the rectum. (c) The CTV has moved 0.5 cm in the positive y-direction compressing the rectum and decreasing the bladder intrusion.