Image-Stabilized X-ray Camera (image) Helmholtz-Zentrum Berlin für Materialien und Energie Share Print E-Mail Caption The outline of the lizard serves as a test object, as well as the conventional test pattern, a section of a so-called Siemens star. The lizard's tail and the converging rays of the Siemens star can be used to measure how well narrow lines will be reproduced in an image. With a diameter of six-thousandths of a millimeter, the entire test object is about the size of a red blood cell. The smallest resolved structure has a width of 46 nanometers. Credit J. Geilhufe/HZB Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.