Patent · US Expired

Computed tomography apparatus involving a conical radiation beam and a helical relative motion

US6426992B1 · kind B1 · utility

5Cited by

1References

6Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Thomas Kohler · Neuenstadt am Kocher, DE
Roland Proksa · Hamburg, DE

Key dates

Filing date	Aug 2, 2001
Grant date	Jul 30, 2002
Priority date	—
Expiry date	Aug 2, 2021

Classification

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

Abstract

The invention relates to a computed tomography apparatus whose radiation source emits a conical radiation beam and is capable of scanning the examination zone along a trajectory in the form of a helix. The detector unit that is connected to the radiation source consists of a plurality of spatially separated detector segments that are mutually offset in the axial direction and each of which is arranged in such a manner that a projection onto the helix covers at least two neighboring turns of the helix. A CT image having an improved and spatially more uniformly distributed signal-to-noise ratio can be reconstructed from the CT data acquired by means of such a detector unit.

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