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. 2012 Jul 5;13(4):141–151. doi: 10.1120/jacmp.v13i4.3796

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© 2012 The Authors.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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The results from the deformable registration tests. The upper panels show an example head and neck patient CBCT to FBCT deformable image registration with our extended FOV CBCT images: (a) the images before applying the deformable registration, with the target (CBCT) image, the source (FBCT) image, and a color overlay (yellow indicates good agreement, green and red indicate negative and positive disagreement) of the two images; (b) the deformed target, the source, and the overlay images, after applying the deformable registration. The lower panels show the registration between a CBCT and its artificially deformed counterpart, (c) before the registration and (d) after the registration. The CBCT image was used as the target, and the artificially deformed image with a Gaussian was used as the source.