Program including abstracts as pdf available here

OP 27
Title
DOSE REDuCTION IN DIGITAL CEPHALOMETRIC RADIOGRAPHy
Authors
R. HOOGEVEEN 1 , R.H. OWSIEJCO 1 , D.V. DANG 1 , G.C.H. SANDERINK 1
Affiliations
1 ACTA - Department of Oral Radiology, Amsterdam, NETHERLANDS
Body
Objectives:
To identify the effect of reduced mAs settings on the accuracy of cephalometric analysis.
Materials and methods:
A human skull embedded in soft tissue equivalent materials was exposed in a Instrumentarium
OC100D machine. Exposure settings were 100, 80, 50, 30 and 20% of the settings as recommended
by the manufacturer. The cephalometric analysis was performed by 9 residents of the
department of Orthodontics using the Viewbox cephalometric software. The accuracy of 15
common landmarks was investigated and statistical analysis was performed with SPSS using
the multivariate F-test.
Results:
No significant differences were found between any of the exposure settings.
Conclusions and discussion:
Considerable dose reduction seems possible in the situation as described. Although the image
quality subjectively seems to reduce, this did not affect the outcomes of the cephalometric
analysis. These results urge to investigate also other machines and phosphor plate systems as
apparently a tremendous dose reduction can be achieved.
Keywords
Cephalometry, Radiography, Dental, Digital
aBSTracTS OP 2
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