X-ray computed tomography apparatus

US5841831A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Erich Hell · Erlangen, DE
• Peter Schardt · Simmerath, DE
• Guenter Schwierz · Erlangen, DE

Key dates

• Filing date: Apr 28, 1997
• Grant date: Nov 24, 1998
• Expiry date: Apr 28, 2017

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B6/032
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

In an x-ray computed tomography apparatus the source of X-rays and the detector are able to scan a volume of the examination subject in a short time. The X-ray source contains an anode that is elongated in the z-direction, on which the focus travels by a controlled deflection of an electron beam. A primary beam diaphragm is displaced synchronously with the focus movement along the anode. The diaphragm forms a pyramid-shaped X-ray beam which always fully strikes the detector but does not overshot the detector. The detector is formed by a matrix of detector elements.