Patent · US Expired

Computerized tomography method with helical relative movement and conical beam

US7187747B2 · kind B2 · utility

2Cited by

5References

9Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Claas Bontus · Hamburg, DE
Thomas Koehler · Norderstedt, DE

Key dates

Filing date	Feb 11, 2004
Grant date	Mar 6, 2007
Priority date	—
Expiry date	May 5, 2024

Classification

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

Abstract

The invention relates to a computerized tomography method, in which an examination area is scanned radiographically along a helical trajectory by a conical beam. The radiation transmitted through the examination area is measured by means of a detector unit, wherein the absorption distribution in the examination area is reconstructed exactly or at least quasi-exactly from these measured values. Reconstruction uses redundant measured values and comprises derivation of the measured values from parallel rays of different projections, integration of these values along κ-lines, weighting of these values and back-projection.

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