Travel stand for a mobile X-ray diagnostic machine
Inventors
Dehler, Juergen • Burgkart, Rainer
Assignees
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Publication Number
US-7766548-B2
Publication Date
2010-08-03
Expiration Date
Abstract
A travel stand for a mobile X-ray diagnostic machine with a laser detection system containing measurement devices to determine the position of the travel stand in a spatially fixed system of coordinates is provided. The measuring devices can operate by non-contact measurement techniques and that the position of the travel stand can be determined by techniques such as triangulation. An X-ray diagnostic machine with such a position detection system offers advantages in the 3D reconstruction from 2D X-ray projection images and in navigationally guided operations under X-ray monitoring.
Core Innovation
The invention is a mobile X-ray diagnostic machine for generating 2D X-ray projection images for a volume reconstruction. The machine includes a C-arm capable of multiple motorized movements and having an X-ray source and an X-ray receiver unit arranged on the C-arm, together with a control and image processing computer that controls the system and performs image processing related to the generated X-ray projection images.
The system further includes a travel stand that can travel over a floor and comprises a reference body with a position detection system connected to the reference body. The position detection system comprises a laser detection system, a path measuring system, and an inclination sensor, where the laser detection system is arranged on the reference body and determines a position of the reference body in a spatially fixed system of coordinates and relays the position to the control and image processing computer.
Using the relayed position, the control and image processing computer calculates a particular X-ray projection geometry. The path measuring system determines a position of the travel stand in relation to the floor, and the inclination sensor determines an inclination of a reference surface of the travel stand, supporting accurate navigation-guided operations by accounting for projection geometry deviations caused by changing floor conditions and related calibration limitations.
Claims Coverage
Independent claim clm-00001 contains the core coverage and is built around position and orientation determination of a travel stand using a laser detection system combined with path measuring and an inclination sensor to calculate particular 2D X-ray projection geometry for volume reconstruction.
Laser-based position detection for spatially fixed coordinate projection geometry
The position detection system comprises a laser detection system arranged on the reference body and adapted to determine a position of the reference body in a spatially fixed system of coordinates and relay the position of the reference body to the control and image processing computer to calculate a particular X-ray projection geometry.
Travel-stand path measuring relative to the floor
A path measuring system capable of determining a position of the travel stand in relation to the floor.
Inclination sensing of a reference surface for corrected projection geometry
An inclination sensor adapted to determine an inclination of a reference surface of the travel stand.
The independent claim requires a mobile X-ray diagnostic machine with a C-arm and a control and image processing computer, together with a travel stand reference body whose position in spatially fixed coordinates is determined by a laser detection system and is combined with path measuring and inclination sensing to calculate a particular X-ray projection geometry for 2D projection images used in volume reconstruction.
Stated Advantages
Improved accuracy of 2D X-ray projection geometry for more accurate 3D volume reconstruction.
Supports navigation-guided operations by addressing projection geometry deviations caused by changes in floor conditions and related calibration limitations.
Documented Applications
Navigationally guided operations monitored with X-ray, including catheter diagnostics/therapy, using the calculated X-ray projection geometry.
Computer-aided surgery (CAS) under X-ray monitoring where accurate navigation is required.
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