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Photon-counting detector vs. cone-beam CT in endodontics: a study of simulated endodontic conditions, treatments, and associated complications. [PDF]
BMC Oral HealthAl-Haj Husain A +11 more
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A phantom for testing Cone Beam CTs
Physical and Engineering Sciences in Medicine, 2020Cone Beam Computed Tomography (CBCT) scanners are becoming more common for dental and maxillofacial/head scanning, but performing image quality tests on these systems is difficult. There are quality assurance (QA) phantoms commercially available but they can be expensive, bulky and not optimised for CBCT imaging limits.
Steven Muir, Johnny Laban
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Towards cone-beam CT thermometry
SPIE Proceedings, 2013Temperature monitoring and therefore the final treatment zone achieved during a cone-beam CT (CBCT) guided ablation can prevent overtreatment and undertreatment. A novel method is proposed to detect changes in consecutive CBCT images obtained from projection reconstructions during an ablation procedure.
Ming Li 0052 +8 more
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Cone-beam CT for radiotherapy applications
Physics in Medicine and Biology, 1995Clinical implementation of cone-beam tomography has been hampered by the lack of two-dimensional electronic x-ray detectors that can encompass the full width of the body. We encountered the undersized detector problem in our development of a cone-beam CT system for radiotherapy applications.
P S, Cho, R H, Johnson, T W, Griffin
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Auto calibration of a cone‐beam‐CT
Medical Physics, 2012Purpose:This paper introduces a novel autocalibration method for cone‐beam‐CTs (CBCT) or flat‐panel CTs, assuming a perfect rotation. The method is based on ellipse‐fitting. Autocalibration refers to accurate recovery of the geometric alignment of a CBCT device from projection images alone, without any manual measurements.Methods:The authors use test ...
Daniel, Gross +4 more
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Physica Medica, 2015
For the maxillofacial region, there are various indications that cannot be interpreted from 2D images and will benefit from multiplanar viewing. Dental cone beam CT (CBCT) utilises a cone- or pyramid-shaped X-ray beam using mostly flat-panel detectors for 3D image reconstruction with high spatial resolution. The vast increase in availability and amount
Timo, Kiljunen +3 more
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For the maxillofacial region, there are various indications that cannot be interpreted from 2D images and will benefit from multiplanar viewing. Dental cone beam CT (CBCT) utilises a cone- or pyramid-shaped X-ray beam using mostly flat-panel detectors for 3D image reconstruction with high spatial resolution. The vast increase in availability and amount
Timo, Kiljunen +3 more
openaire +2 more sources
Crescent artifacts in cone‐beam CT
Medical Physics, 2011Purpose:In image‐guided radiation therapy, cone‐beam CT has been adopted for three‐dimensional target localization in the treatment room. In many of these cone‐beam CT images, dark and light crescent artifacts can be seen. This study investigates potential causes of this artifact and a technique for mitigating the crescents.Methods:Three deviations ...
William, Giles +3 more
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Cone-beam reconstruction for Micro-CT
Proceedings IEEE International Symposium on Biomedical Imaging, 2003X-ray micro-CT has been a focus in the CT/Micro-CT Lab, the University of Iowa. In this paper, some recent progress we made on cone-beam micro-CT is described. First, we address approximation reconstruction using Feldkamp-type algorithms with multiple X-ray sources and displaced detector configurations.
Ge Wang 0001 +4 more
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Respiratory correlated cone beam CT
Medical Physics, 2005A cone beam computed tomography (CBCT) scanner integrated with a linear accelerator is a powerful tool for image guided radiotherapy. Respiratory motion, however, induces artifacts in CBCT, while the respiratory correlated procedures, developed to reduce motion artifacts in axial and helical CT are not suitable for such CBCT scanners. We have developed
Van Herk, Marcel; id_orcid 0000-0001-6448-898X +4 more
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