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- Title
On-the-fly geometrical calibration fine-tuning of a mobile C-arm CBCT system.
- Authors
El Hakimi, Wissam; Sakas, Georgios
- Abstract
C-arm cone-beam computed tomography (CBCT) offers CT-like 3D imaging capabilities while being appropriate for interventional suites. 3D images are reconstructed based on 2D projections gathered during the rotation of the C-arm around the object under investigation. It is mandatory to provide accurate geometrical projection parameters for each acquired 2D image, otherwise significant CT artifacts may be induced in the reconstructed 3D volume. Usually, a pre-calibration (offline calibration) using an X-ray phantom is preformed under the assumption that the C-arm motion is reproducible. Thereby, stochastic misalignments due to the open design of mobile C-arm CBCT systems are not considered. In this article we introduce a novel online calibration algorithm to compensate stochastic mechanical inaccuracies. The performance of the proposed method is demonstrated on simulated and real data.
- Subjects
CONE beam computed tomography; THREE-dimensional imaging; CALIBRATION; ALGORITHMS; SIMULATION methods &; models
- Publication
Technisches Messen, 2016, Vol 83, Issue 5, p300
- ISSN
0171-8096
- Publication type
Article
- DOI
10.1515/teme-2015-0059