X-ray radiation diaphragm and control method therefor, and CT device embodying same

US7953208B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Ulrich Kuehn · Baiersdorf, DE
• Heiko Wolf · Thalwil, CH

Key dates

• Filing date: Jun 20, 2008
• Grant date: May 31, 2011
• Expiry date: Oct 9, 2028

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B6/027
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A collimator device has at least one masking device that is adjustable between two end positions for collimation of a beam fan in an x-ray CT device, wherein the x-ray fan is schematically not masked in a first end position. The x-ray beam is more than half-masked in a second end position of the masking device. In a method for operation of such a collimator device as well as an x-ray CT device for examination of a subject having an x-ray source, a collimator device, and a control device for regulation of the aperture width of the masking device, an x-ray detector is arranged opposite the x-ray source and the collimator device and that detects the x-rays modified due to the intervening examination subject; and an image construction device reconstructs an image of the examination subject therefrom.