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. 2015 Oct 27;474(3):816–824. doi: 10.1007/s11999-015-4613-2

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© The Association of Bone and Joint Surgeons® 2015

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Fig. 1A–B — (A) A pixel value ratio was calculated during the distraction phase in the LON technique. After a region of interest was made with a polygonal shape in the regenerate bone and the adjacent bones, the pixel value ratio was calculated. Care was taken to avoid any hardware shadows. Pixel value ratio = (pixel value of the regenerate bone)/([pixel value of the proximal adjacent bone + pixel value of the distal adjacent bone]/2); Mean = mean pixel value of the region of interest; SD = SD of the pixel value of the region of interest; Area = area of the region of interest. (B) A pixel value ratio was calculated during the distraction phase in the LATN technique. After a region of interest was made with a polygonal shape in the regenerate bone and adjacent bones, the pixel value ratio was calculated. Care was taken to avoid any hardware shadows. LON = lengthening over nail; LATN = lengthening and then nailing.