Patent · US Expired

Computed tomography method utilizing a conical radiation beam

US6285733A · kind A · utility

30Cited by

4References

6Claims

0Family size

Assignee

U.S. Philips Corporation · US

Inventors

Roland Proksa · Hamburg, DE
Michael Grass · Hanstedt, DE

Key dates

Filing date	Sep 30, 1999
Grant date	Sep 4, 2001
Priority date	—
Expiry date	Sep 30, 2019

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S378/901
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

The invention relates to a computed tomography method in which the examination zone is scanned along a circular path by means of a conical radiation beam. The computation required for the reconstruction of the absorption distribution in the examination zone can be reduced by taking the following steps: a) rebinning of the measuring data so as to form a number of groups, each group containing a plurality of planes which extend parallel to one another and parallel to the axis of rotation, each plane containing a respective fan beam, b) one-dimensional filtering of the data, produced by the rebinning, of each group in the direction perpendicular to the direction of the planes, and c) reconstructing the spatial distribution of the absorption from the filtered data of different groups.

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