Kinect-Based Correction of Overexposure Artifacts in Knee Imaging with C-Arm CT Systems
Joint Authors
Fahrig, Rebecca
Rausch, Johannes
Choi, Jang-Hwan
Hinshaw, Waldo
Schebesch, Frank
Haase, Sven
Wasza, Jakob
Riess, Christian
Hornegger, J.
Maier, Andreas
Source
International Journal of Biomedical Imaging
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-07-19
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Abstract EN
Objective.
To demonstrate a novel approach of compensating overexposure artifacts in CT scans of the knees without attaching any supporting appliances to the patient.
C-Arm CT systems offer the opportunity to perform weight-bearing knee scans on standing patients to diagnose diseases like osteoarthritis.
However, one serious issue is overexposure of the detector in regions close to the patella, which can not be tackled with common techniques.
Methods.
A Kinect camera is used to algorithmically remove overexposure artifacts close to the knee surface.
Overexposed near-surface knee regions are corrected by extrapolating the absorption values from more reliable projection data.
To achieve this, we develop a cross-calibration procedure to transform surface points from the Kinect to CT voxel coordinates.
Results.
Artifacts at both knee phantoms are reduced significantly in the reconstructed data and a major part of the truncated regions is restored.
Conclusion.
The results emphasize the feasibility of the proposed approach.
The accuracy of the cross-calibration procedure can be increased to further improve correction results.
Significance.
The correction method can be extended to a multi-Kinect setup for use in real-world scenarios.
Using depth cameras does not require prior scans and offers the possibility of a temporally synchronized correction of overexposure artifacts.
To achieve this, we develop a cross-calibration procedure to transform surface points from the Kinect to CT voxel coordinates.
American Psychological Association (APA)
Rausch, Johannes& Maier, Andreas& Fahrig, Rebecca& Choi, Jang-Hwan& Hinshaw, Waldo& Schebesch, Frank…[et al.]. 2016. Kinect-Based Correction of Overexposure Artifacts in Knee Imaging with C-Arm CT Systems. International Journal of Biomedical Imaging،Vol. 2016, no. 2016, pp.1-15.
https://search.emarefa.net/detail/BIM-1105408
Modern Language Association (MLA)
Rausch, Johannes…[et al.]. Kinect-Based Correction of Overexposure Artifacts in Knee Imaging with C-Arm CT Systems. International Journal of Biomedical Imaging No. 2016 (2016), pp.1-15.
https://search.emarefa.net/detail/BIM-1105408
American Medical Association (AMA)
Rausch, Johannes& Maier, Andreas& Fahrig, Rebecca& Choi, Jang-Hwan& Hinshaw, Waldo& Schebesch, Frank…[et al.]. Kinect-Based Correction of Overexposure Artifacts in Knee Imaging with C-Arm CT Systems. International Journal of Biomedical Imaging. 2016. Vol. 2016, no. 2016, pp.1-15.
https://search.emarefa.net/detail/BIM-1105408
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1105408