منابع مشابه
Artefacts 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 کاملPhysics (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 کاملTitle: Breathing motion compensated reconstruction for C-arm cone beam CT imaging: initial experience based on animal data
C-arm based tomographic 3D imaging is applied in an increasing number of minimal invasive procedures. Due to the limited acquisition speed for a complete projection data set required for tomographic reconstruction, breathing motion is a potential source of artifacts. This is the case for patients who cannot comply breathing commands (e.g. due to anesthesia). Intra-scan motion estimation and com...
متن کاملSurrogate-driven motion models from cone-beam CT for motion management in radiotherapy treatments
This thesis details a variety of methods to build a surrogate-driven motion model from a cone-beam CT (CBCT) scan. The methods are intended to form a key constituent of a tracked RT treatment system, by providing a markerless means of tracking tumour and organs at risk (OAR) positions in real-time. The beam can then be adjusted to account for the respiratory motion of the tumour, whilst ensurin...
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ژورنال
عنوان ژورنال: Radiotherapy and Oncology
سال: 2019
ISSN: 0167-8140
DOI: 10.1016/s0167-8140(19)30660-7