Patent · US Active

Computed tomography method with helical relative movement and conical beam bundle

US7889901B2 · kind B2 · utility

5Cited by

5References

16Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Claas Bontus · Hamburg, DE
Michael Grass · Hanstedt, DE
Thomas Koehler · Norderstedt, DE

Key dates

Filing date	Jan 31, 2006
Grant date	Feb 15, 2011
Priority date	—
Expiry date	Jun 7, 2028

Classification

Technology area (CPC G)Physics
CPC primaryG06T2211/421
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

The invention relates to a computed tomography method in which a periodically moving object is irradiated by a conical beam bundle. An nPi-relative movement is generated between a radiation source, which generates the conical beam bundle, and the object. During the nPi-relative movement, measured values are acquired, which depend on the intensity in the beam bundle on the other side of the object and from these measured values filter values are determined, which are divided into different groups. The filter values of at least one group are weighted in dependence on the movement of the object, wherein, when filter values of several groups are weighted, filter values of different groups are weighted differently in dependence on the movement of the object. Finally, a CT image of the object is reconstructed from the filter values.

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