Gibbs and truncation phantoms

Case contributed by Dr J. Ray Ballinger

The first axial image is a phantom containing water, surrounded by air. The image was encoded 128 times in the horizontal direction and 256 times in the vertical direction. Note the prominent light and dark line along the sides that fade as they approach the top and bottom of the phantom. 

The second image was encoded 256 times in both directions. Minimal artifact is seen uniformly around the periphery of the phantom.

PlayAdd to Share

Case information

rID: 22133
Published: 14th Mar 2013
Last edited: 14th Aug 2019
Inclusion in quiz mode: Excluded

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.