Dosimetry of Three Intraoral Imaging Collimators and Technical Performance using Two Intraoral Device/Collimator Combinations Public Deposited

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  • March 22, 2019
  • Johnson, Kenneth Brandon
    • Affiliation: School of Dentistry, Department of Dental Ecology
  • Using optical stimulated luminescent dosimetry, FMX effective dose (E) was calculated for 18-projection adult and 12-projection child anthropomorphic phantom examinations using circular and Rinn® (Standard) and Tru-Align™ (Test) rectangular collimators. Technical performance was assessed for rectangular devices using paired FMXs made on DXTTR phantoms by 17 senior dental hygiene students. Image errors, time/motion effort, and collimator preference were evaluated. Adult FMX E was 95μSv circular, 76μSv Test, 60μSv Standard (p=0.001). Child doses were 80μSv circular, 70μSv Test, 48μSv Standard. Child thyroid-shielding produced significant reductions in effective dose for Standard (p=0.004). A lower mean number of errors occurred with the Test compared to the Standard (p=0.048); however, major errors requiring retakes were not statistically different for the two systems. Subjects preferred the Test device which produced FMXs in less time. The Test device produced diagnostically acceptable radiographs more efficiently with fewer cone-centering errors, but at the expense of patient dose.
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  • Mauriello, Sally M.
  • Master of Science
Graduation year
  • 2013

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