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Experimental evaluation of the accuracy at the C-arm pose estimation with x-ray images

Thürauf S, Vogt F, Hornung O, Korner M, Nasseri MA, Knoll A (2016)

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Publication Type: Conference contribution

Publication year: 2016

DOI: 10.1109/EMBC.2016.7591570

Abstract

C-arm X-ray systems need a high spatial accuracy for applications like cone beam computed tomography and 2D/3D overlay. One way to achieve the needed precision is a model-based calibration of the C-arm system. For such a calibration a kinematic and dynamic model of the system is constructed whose parameters are computed by pose measurements of the C-arm. Instead of common measurement systems used for a model-based calibration for robots like laser trackers, we use X-ray images of a calibration phantom to measure the C-arm pose. By the direct use of the imaging system, we overcome registration errors between the measurement device and the C-arm system. The C-arm pose measurement by X-ray imaging, the new measurement technique, has to be evaluated to check if the measurement accuracy is sufficient for the model-based calibration regarding the two mentioned applications. The scope of this work is a real world evaluation of the C-arm pose measurement accuracy with X-ray images of a calibration phantom using relative phantom movements and a laser tracker as ground truth.

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How to cite

APA:

Thürauf, S., Vogt, F., Hornung, O., Korner, M., Nasseri, M.A., & Knoll, A. (2016). Experimental evaluation of the accuracy at the C-arm pose estimation with x-ray images.

MLA:

Thürauf, Sabine, et al. "Experimental evaluation of the accuracy at the C-arm pose estimation with x-ray images." 2016.

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