TESTS FOR A 3D ROUND SYSTEM AND PROCEDURES FOR DETERMINING THE LOCATION OF A 3D ROUND SYSTEM BY THE TEST PROPER

摘要

Test bodies (10) for determining the local resolution of a 3D X-ray system, having the following characteristics:three orthogonally arranged and interconnected disc structures (12, 14, 16) with a common focal point (18);where each disc structure has a straight number of N-shaped pyramid or pyramid-shaped disc structure sectors (12-N, 14-N, 16-N) rejuvenating to the common centre (18); andwhere adjacent disc structural sectors of a disc structure have different X-ray absorption characteristics.