Tomographic apparatus for the production of transverse layer images

US4345158A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Manfred Pfeiler · Erlangen, DE
• Karlheinz Pauli · Neunkirchen, DE

Key dates

• Filing date: Oct 14, 1980
• Grant date: Aug 17, 1982
• Expiry date: Oct 14, 2000

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B6/482
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

In an exemplary embodiment, a radiation measuring arrangement has two x-ray tubes of different radiation energy which generate radiation beams penetrating the radiography subject, and also has a radiation receiver which determines the radiation intensity behind the subject. The radiography subject is irradiated from different directions. A computer determines, for every image point, the attenuation coefficient for every radiation energy and determines therefrom the mean ordinal number and the density. The radiation receiver is designed as a stationary detector ring. For scanning only the x-ray tubes are rotated about the radiography subject. They are maintained at such a distance from one another that no detector element is simultaneously impinged upon by both radiation beams.