title: A linear tomographic alignment test object.
abstract: A simple test object that accurately assesses linear tomographic tube and cassette-movement alignment is described. This device consists of two offset pinholes, one located above and one below the fulcrum plane. The test object is easy to make and can be used during the installation and performance testing of conventional tomographic units.
mesh_terms: D006801:Humans; D014056:Tomography, X-Ray / Q000295:instrumentation / Q000379:methods*