Patent · US Expired

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

US6442229B1 · kind B1 · utility

10Cited by

0References

5Claims

0Family size

Assignee

KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

Thomas Koehler · Norderstedt, DE
Michael Grass · Hanstedt, DE

Key dates

Filing date	Oct 2, 2001
Grant date	Aug 27, 2002
Priority date	—
Expiry date	Oct 2, 2021

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61B6/027
WIPO fieldMedical technology
WIPO sectorInstruments

Abstract

The invention relates to a computed tomography apparatus wherein the start position and/or the stop position for a helical relative motion between the radiation source, generating a conical radiation beam, on the one side and the examination zone on the other side are adjusted in such a manner that the zones that, at the beginning and/or the end, are irradiated by the radiation beam to an extent which does not suffice for reconstruction become larger underneath the table top, in the direction of the axis of rotation, than above the table top.

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