Method for correcting non-reproducible geometric errors...

Details Method for correcting non-reproducible geometric errors... Method for correcting non-reproducible geometric errors...

2006-01-23

2009-02-24

Kao, Chih-Cheng G (Department: 2882)

X-ray or gamma ray systems or devices

Accessory

Testing or calibration

C378S197000

Reexamination Certificate

active

07494278

ABSTRACT:
In a method for correcting non-reproducible geometric errors occurring during the operation of an x-ray C-arm device, having a C-arm carrying an x-ray source, during orbital displacement of the C-arm during a scan for 3D reconstruction of a subject volume, a 2D dataset, which is not impaired by non-reproducible geometric errors during the scan, is determined. This 2D dataset is compared to known projection matrices of the x-ray C-arm device, which compensate reproducible geometric errors of the C-arm device. The result of the comparison is used to modify the projection matrices of the scan to compensate non-reproducible geometric errors that occur during the scan.

REFERENCES:
patent: 6379041 (2002-04-01), Schuetz et al.
patent: 7147373 (2006-12-01), Cho et al.
patent: 2007/0238986 (2007-10-01), Graumann

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