Test object for quality control of digitalvolume tomography (3D) X-ray installationsTest object for testing the spatial resolution of X-rayunits for digital volume tomography (DVT)Checks the spatial resolution at DVT systems for ENT and at C arm systems with 3D functionConsists out of a 10 mm thick detail plate embedded between two 25 mm thick PMMA absorbersPMMA detail plate incl. four cylindrical cavities with different diameters 0.5/0.6/0.7/0.8/0.9/1/1.3 mmwhich are arranged parallel to the z-axisOuter dimensions (120 x 120 x 60) mm