Method for image reconstruction of an object with the aid of projections, and apparatus for carrying out the method

US7653171B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Holger Kunze · Bubenreuth, DE
• Karl Stierstorfer · Erlangen, DE

Key dates

• Filing date: May 30, 2007
• Grant date: Jan 26, 2010
• Expiry date: Jan 22, 2028

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61B6/466
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A method is disclosed for image reconstruction of an object with the aid of at least one-dimensional projections of the object into a three-dimensional volume image data record, it being possible to generate the projections by at least one detector/source system with reference to different positions and angles relative to the object, and at least two projections forming a reconstruction volume in an overlap region as basis for a backprojection of the projections into the three-dimensional volume image data record, in particular computed tomography. An apparatus for carrying out the method is further disclosed. In at least one embodiment, supplemented reconstruction volumes are generated by supplementing reconstruction volumes, covered only partially by projections, by way of virtual projections that are derived from volume image data records. By comparison with reconstruction volumes that are merely interpolated, supplementing a reconstruction volume with the aid of virtual projections can decisively improve the image quality of the computed tomography images that are backprojected therefrom.