Absorbed dose distributions in dental and maxillofacial cone beam computed tomography (dental CBCT) are essential to dental CBCT dose indices. Direct measurements by thermoluminescence detectors are laborious. We establish a valid GEANT4 based absorbed dose simulation program with mean deviation being 7.25% compared to experimental measurements. Dental CBCT absorbed dose distributions simulated by this program indicate : The distributions are not always symmetry; Non-symmetry cases are when phantom center is departured from isocenter, half-fan beam with 360° scan angle range and some case full-fan beam with less than 360° scan angle range; Dose index weights for circular symmetry absorbed dose distributions are quite different for fields of view diameter bigger and smaller than phantom diameter.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.