• Corpus ID: 222090909

C-Arm Non-Circular Orbits: Geometric Calibration, Image Quality, and Avoidance of Metal Artifacts

@article{Wu2020CArmNO,
  title={C-Arm Non-Circular Orbits: Geometric Calibration, Image Quality, and Avoidance of Metal Artifacts},
  author={Pengwei Wu and Niral Sheth and Alejandro Sisniega and Tongyu Wang and Ali Uneri and Runze Han and Rohan C. Vijayan and Prasad Vagdargi and Bjoern Kreher and Holger Kunze and Gerhard Kleinszig and Sebastian Vogt and Sheng-fu Larry Lo and Nicholas Theodore and Jeffrey H. Siewerdsen},
  journal={arXiv: Medical Physics},
  year={2020}
}
Metal artifacts present a frequent challenge to cone-beam CT (CBCT) in image-guided surgery, obscuring visualization of metal instruments and adjacent anatomy. Recent advances in mobile C-arm systems have enabled 3D imaging capacity with non-circular orbits. We extend a previously proposed metal artifacts avoidance (MAA) method to reduce the influence of metal artifacts by prospectively defining a non-circular orbit that avoids metal-induced biases in projection domain. Accurate geometric… 
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