Different performance of devices used in case of patients undergoing dental cone beam computed tomography (CBCT) examinations as well as procedure itself may result in complex dose distribution within the patient .
At the moment,
depending on publication,
three dosimetric quantities (dose indices) are suggested to be used as representation of patient dose: CT dose index (CTDI) ,
CBCT dose indices (CBCTDI1 and CBCTDI2) or dose-area product (DAP) [1,
CBCT dose indices,
CBCTDI1 and CBCTDI2 were proposed by the SEDENTEXCT project .
Description of activity and work performed
For the purpose of investigation,
Monte Carlo simulation was used and experimental measurements were performed.
CBCT dental unit was simulated using Monte Carlo N-Particle transport code (MCNP® 6.1.1beta) and model verification was performed using PMMA head CTDI phantom and radiochromic films (Figure 2) as described in previously published study .
For calculation of organ doses and for the assessment of effective doses computational anthropomorphic phantom was used („Zubal“) (Figure 3) [6,
Most often clinical protocols involving different exposure geometries including sizes and positions of...
Conclusion and recommendations
Because DAP is easily measurable and it shows strong linear correlation with effective dose,
it should be used for establishing DRL in case of dental CBCT examinations.
1University Hospital Dubrava,
2University of Zagreb,
3Josip Juraj Strossmayer University of Osijek,
4University Hospital Merkur,
 Pauwels R,
Horner K and Bogaerts R 2012 Dose distribution for dental cone beam CT and its implication for defining a dose index Dentomaxillofacial Radiol.
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Cone Beam CT for Dental and Maxillofacial Radiology: Evidence Based Guidelines.
Radiation Protection Publication 172.
 Araki K,
Dose indices in dental...