title: Testing coincidence of x-ray and light beam.
abstract: Recent government legislation in many countries around the world calls for specific alignment accuracy between x-ray and light beams for diagnostic x-ray machines. This technical report describes an alignment model that can be used to check the coincidence of both the x-ray field and its central ray with the light field and its cross hairs.
mesh_terms: D008027:Light; D011859:Radiography; D013679:Technology, Radiologic