Maxillofacial Cone Beam Computed Tomography 2018
DOI: 10.1007/978-3-319-62061-9_4
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“…7 • Appearance: Linear dark bands or cupping defects where the central portion of an object with uniform attenuating properties appears darker in the centre. 8 • Prevention: Reduced by excluding beam hardened areas from the scan volume (such as by tipping the maxilla/mandible such that the highly-attenuating lies in a different plane to the structure of interest during imaging), increasing the energy of the X-ray photons (i.e., increasing the kVp), and pre-hardening the beam with filters. 7 Photon starvation (extinction/zero/ missing value artifacts)…”
Section: Beam Hardeningmentioning
confidence: 99%
“…7 • Appearance: Linear dark bands or cupping defects where the central portion of an object with uniform attenuating properties appears darker in the centre. 8 • Prevention: Reduced by excluding beam hardened areas from the scan volume (such as by tipping the maxilla/mandible such that the highly-attenuating lies in a different plane to the structure of interest during imaging), increasing the energy of the X-ray photons (i.e., increasing the kVp), and pre-hardening the beam with filters. 7 Photon starvation (extinction/zero/ missing value artifacts)…”
Section: Beam Hardeningmentioning
confidence: 99%