US 2003/0152195 A1Published application

Method and apparatus for generating a volume dataset representing a subject

AssigneeSiemens Aktiengesellschaft

InventorsAxel Hebecker, Joachim Hey, Matthias Mitschke, Lutz-Peter Nolte, Oliver Schuetz, Heinz Waelti

Life of this patent

Estimating the term…

Loading patent…

Abstract

In a method and an apparatus for generating a volume dataset of a subject taking a movement of the subject into consideration, a referencing base is arranged at the subject, so that the positions and the orientations of the referencing base can be acquired during a registration of a series of 2D projections of the subject. The volume dataset of the subject is generated on the basis of the series of 2D projections as well as based on the deviations of the positions and of the orientations of the referencing base from a fixed reference position of the referencing base that are determined for all 2D projections of the series.

Claims10

Dependent claims

A method for generating a volume dataset representing at least a portion of a subject experiencing movement comprising the steps of:

disposing a referencing base at a subject experiencing movement, and continually identifying a position and an orientation of said referencing base with a position acquisition system;
obtaining a series of 2D projections of at least a portion of said subject with a C-arm X-ray system having a C-arm, and determining a position of said C-arm with said position acquisition system substantially simultaneously with at least one exposure of a 2D projection of the series of said 2D projections;
in a computer, determining a deviation of a current position and a current orientation of said referencing base from a reference position for said reference base for said at least one 2D projection;
and
generating a volume dataset from said series of 2D projections using projection matrices, by generating said volume dataset dependent on said deviation of said reference base associated with said at least one 2D projection and said position of said C-arm obtained substantially simultaneously with said at one 2D projection.

2 more elements

An apparatus for generating a volume dataset representing at least a portion of a subject experiencing movement comprising:

a referencing base at a subject experiencing movement;
a C-arm X-ray system having a C-arm for obtaining a series of 2D projections of at least a portion of said subject;
a position acquisition system for continually identifying a position and an orientation of said referencing base and for determining a position of said C-arm with said position acquisition system substantially simultaneously with at least one of said 2D projections;
a computer in communication with said position acquisition system for determining a deviation of a current position and a current orientation of said referencing base from a reference position for said reference base for said at least one 2D projection;
and
said computer generating a volume dataset from said series of 2D projections using projection matrices, by generating said volume dataset dependent on said deviation of said reference base associated with said at least one 2D projection and said position of said C-arm obtained substantially simultaneously with said at one 2D projection.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/366,048Filed 13 Feb 2003
Priority: DE 10206190.414 Feb 2002
Published: 14 Aug 2003
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

A61B 6/4405
Constructional features of apparatus for radiation diagnosis: the apparatus being movable or portable, e.g. handheld or mounted on a trolley
A61B 6/547
Control of apparatus or devices for radiation diagnosis: involving tracking of position of the device or parts of the device
A61B 5/1127
Using a particular sensing technique: using markers
A61B 6/4441
The source unit and the detector unit being coupled by a rigid structure: the rigid structure being a C-arm or U-arm