Figure 3 : Phantom specially designed and built to obtain an image of the lead sphere pattern, distorted as a result of intensifier/source geometry (Pincushion effect).

Point coordinates are correcated based on the transformation deduced from the phantom. Spheres are 1 mm in diameter and spaced 10 mm from each other. This image was obtained with Angiostar Plus, SIEMENS.

Simini et al.Medical Imaging and Radiology  2017 5:4DOI : 10.7243/2054-1945-5-4