[Test object for controlling the quality of orthopantomography]

Great emphasis is placed on a FO-01 orthopantomographic phantom test for checking the position of the projection boundary of an isolated layer, its shape and thickness. The basic specific feature of the phantom test is that one can rather simply check the adjustment of orthopantomographs of different kinds (including digital ones) and make their comparative assessment by the projection of an isolated layer with certain resolution. Examples of projection nomograms of an isolated layer for different orthopantomographs, which are obtained by this test object are given.