منابع مشابه
Physics (CT VI-Cone Beam CT)
Participants Kai Niu, MS, Madison, WI (Presenter) Nothing to Disclose Pengfei Yang, Shanghai, China (Abstract Co-Author) Nothing to Disclose Beverly A. Kienitz, MD, DDS, Madison, WI (Abstract Co-Author) Nothing to Disclose Ke Li, PhD, Madison, WI (Abstract Co-Author) Nothing to Disclose Sebastian Schafer, Madison, WI (Abstract Co-Author) Consultant, Siemens AG Kevin Royalty, PhD,MBA, Hoffman Es...
متن کاملRespiratory correlated cone beam CT.
A 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 an alternative respiratory correlated proc...
متن کاملArtefacts in cone beam CT
Cone beam computed tomography (CBCT) is the modern third dimension applied in the field of oral maxillofacial region. With lower radiation dose compared to conventional CT, its applications in dentistry has increased tremendously. Artefacts can seriously degrade the quality of computed tomographic (CBCT) images, sometimes to the point of making them diagnostically unusable. To optimize image qu...
متن کاملAuto calibration of a cone-beam-CT.
PURPOSE 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 objects containing small arbitrarily posi...
متن کاملMedicolegal Issues Related to Cone Beam CT
The introduction of cone beam computed tomography into dentistry, and particularly into private offices, has raised a number of medicolegal issues. Among the issues raised are who may own and operate the machines, for what purposes should the machines be used, how broadly or narrowly should the field be collimated, does the full volume need to be interpreted and, if so, by whom? For images inte...
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ژورنال
عنوان ژورنال: Dentomaxillofacial Radiology
سال: 2014
ISSN: 0250-832X,1476-542X
DOI: 10.1259/dmfr.20140109