Keywords:
Dosimetry, Digital radiography, Radioprotection / Radiation dose, Dosimetric comparison
Authors:
E. Alukić, N. Mekis; Ljubljana/SI
DOI:
10.1594/ecr2018/C-2413
Methods and materials
The research was performed on intraoral dental X-ray unit.
The round collimation measurements were performed on a round BID and measurements for the rectangular collimation with an additional rectangular collimation,
which is attached to the end of the round BID (image 1).
A circular collimation produced an image with a diameter of 6 cm and rectangular collimation with size of 4 cm × 5 cm (image 2).
The measurements of DAP were made using external DAP meter which was installed directly under the PID (position indicating device).
The measurements were repeated five times for each set of teeth,
so in complete 30 measurements were made.
Measurements were performed according to protocol (exposure parameters) that are used daily in the clinical environment,
with constant 60 kVp and 7 mA.
The obtained data were processed with the IBM SPSS STATISTICS 22 program,
where Kolmogorov Smirnov test was used to determine the normal distribution of the variable and non-parametric Mann Whitney U test was used to compare the DAP values.