Comparison of manual and dose reduction modes of a MORITA R100 cBcT

Dennis Rottke, Julia Dreger, Kunihiko Sawada, Kazuya Honda, Dirk Schulze

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


objective: To compare effective dose differences when acquiring (1) dose reduction mode and (2) manual mode in a MORITA R100 CBCT. Methods: 24 exposure protocols with different technique factors were performed in both the dose reduction mode and the manual mode in a Veraviewepocs 3D R100 cone beam CT device. 48 TLD were placed in a RANDO head phantom at 24 different sites. Effective doses were calculated according to the formalism published in the 103rd ICRP report. Results: Effective doses for the dose reduction mode protocols ranged from 14 to 156 µSv [mean = 57 µSv, standard deviation (SD) = 37 µSv], whereas effective doses for the manual mode protocols ranged from 22 to 267 µSv (mean = 94 µSv, SD = 65 µSv). Thus, across all protocols, the dose reduction mode leads to a drop of the effective dose by 38 % (SD = 6 %). conclusions: The estimated effective doses are significantly lower if dose reduction protocols are acquired.

Original languageEnglish
Article number20180009
JournalDentomaxillofacial Radiology
Publication statusPublished - 2019


  • Cone-beamcomputedtomography
  • Radiationdosage
  • Thermoluminescentdosimetry


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