Skip to main content
. Author manuscript; available in PMC: 2015 Jan 8.
Published in final edited form as: Bone. 2008 Sep 10;44(1):176–184. doi: 10.1016/j.bone.2008.08.118

Figure 6.

Figure 6

Micro-computed tomography images (0.036 mm isotropic voxels) demonstrating the cupping artifact in a liquid dipostassium phosphate phantom. The grayscale intensity profile (a) of the original image (b) confirms the presence of the cupping artifact characterized by radial decreases in the grayscale intensity from the periphery towards the center. Although the grayscale changes appear subtle to the naked eye, the grayscale values in the center of the image are approximately 17% lower than the values along the outer limit of the phantom. Reduction of the image’s grayscale dynamic range (c) visually reinforces the pixel intensity decreases radially inward in the liquid phantom image, as characterized by the grayscale profile.