Method and apparatus for detecting a particular material in an object by means of electromagnetic radiation

US9128200B2 · kind B2 · utility

Assignee

• SMITHS HEIMANN GMBH · DE

Inventors

• Matthias Muenster · Wiesbaden, DE
• Joerg Nittikowski · Bärnau, DE
• Pia Dreiseitel · Eschborn, DE
• Andreas Mader · Heidelberg, DE
• Rainer Heinkel · Schweppenhausen, DE
• Thomas RIES · Lutz, US
• Dirk Naumann · Lorsch, DE
• Uwe Siedenburg · Essenheim, DE

Key dates

• Filing date: Oct 18, 2010
• Grant date: Sep 8, 2015
• Expiry date: Sep 12, 2032

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2223/639
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method and apparatus is provided for detection of a particular material in an object, in particular in an item of luggage, by means of electromagnetic radiation in which the intensities of non-absorbed radiation from at least three radiation planes are measured and evaluated in associated detector apparatus, wherein an image is produced, initially from the intensities of the non-absorbed radiation, and then if single regions of low complexity are found which are characterized by approximately constant intensities, an estimation of the attenuation coefficient s performed and a material detection is carried out in the region according to an algorithm which calculates a three-dimensional reconstruction from different views.