Computed tomography scanning method and apparatus wherein exposure of an examining person to scanning radiation is avoided

US6853701B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Dieter Cherek · Hirschaid, DE
• Robert Kagermeier · Koblenzer Straße, DE
• Donal Medlar · Weisendorf, DE
• Uwe Urmoneit · Gerhardshofen, DE

Key dates

• Filing date: Aug 20, 2002
• Grant date: Feb 8, 2005
• Expiry date: Apr 10, 2023

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B6/03
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

In a CT scanning method and apparatus wherein a radiation source is displaced around a system axis and a ray bundle therefrom strikes a detector system that supplies scan data on the basis whereof two-dimensional scan images of the examination subject are determined in an image calculating device, parameters describing the position of a body part of an examining person situated in the beam path are determined by an analysis of registered scan images, and the radiation source is controlled dependent on the analysis result so that the radiation is reduced when the body part is located in the beam path.