Method and tomography unit for the reconstruction of a tomographic display of an object

US7447295B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Martin Hoheisel · Erlangen, DE
• Wolfgang Härer · Erlangen, DE
• Holger Kunze · Bubenreuth, DE
• Karl Stierstorfer · Erlangen, DE

Key dates

• Filing date: Oct 23, 2006
• Grant date: Nov 4, 2008
• Expiry date: Oct 28, 2026

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2211/424
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A method is disclosed for reconstructing a tomographic representation of an object from projection data off a moving radiation source through this object onto a detector, filtering and back projection of the projection data being executed in the reconstruction. In an embodiment of the method, by using at least one identical spatial arrangement of the radiation source, the detector and a test object instead of the object to be scanned, there is determined by test projections and an iterative reconstruction technique, a filter that in the given arrangement results in an optimum filtering and back projection of the projection data of the test object for the tomographic representation. Further, the object is scanned instead of the test object in the given arrangement and projection data are determined. Finally, the reconstruction of the tomographic representation is carried out using these projection data and the filter determined. Moreover, an embodiment of a tomography unit for carrying out this method is also disclosed.