Patent · US Active

Method for determining gray-scale values for volume elements of bodies to be mapped

US7780351B2 · kind B2 · utility

8Cited by

5References

17Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Benno Heigl · Coburg, DE
Stefan Hoppe · Berching, DE
Joachim Hornegger · Effeltrich, DE
Günter Lauritsch · Nuremberg, DE

Key dates

Filing date	Jan 15, 2008
Grant date	Aug 24, 2010
Priority date	—
Expiry date	Sep 24, 2028

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61B6/583
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

The invention relates to a method for determining gray-scale values for volume elements of bodies to be mapped using an x-ray image recording system. When a body to be mapped is not mapped in full on a single projection image for a rotational position, a second projection image must be made and a virtual projection image derived from the two projection images, this being back-projected onto the volume elements. For calibration the present invention proposes making the same two projection images in each case at a calibration phantom and additionally a further projection image, corresponding to the position and orientation of the virtual projection image. As a result the mathematical relationships between the projection images and the virtual projection image and for the back-projection can be derived.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.