Patent ID: 6084941
Filing Date: 2000-07-04
Classification: A61B,G01B

Abstract:
A device for direct visual reading at X-ray examination of dimensions of measurement objects, difficult to get at, in bodies of people and animals, which device contains a comparison body (10,20) made of X-ray dense material, wherein said comparison body (10,20) is confined by at least four similar surfaces of revolution (11-16, 21-27) each surface of revolution having a diameter, each said diameter being different and known, said surfaces of revolution (11-16, 21-27) forming a series with a quotient between consecutive diameters within an interval of .fourthroot.2=1.19 to 1.5, and wherein said comparison body shows fittings for being placed, directly or indirectly, at the exterior surface of the human or animal body so close to the measurement object and so oriented that one and the same X-ray exposure will give an image not only of the measurement object but also, close to it, of the comparison body.