Investigation of Patient Dose Received During Digital Dental Radiography and Comparison with International Diagnostic Reference Level (DRL)
Patient exposure from digital dental radiography has increased rapidly and contributes to one of the major sources for radiation doses received in diagnostic radiology. Therefore, assessment on patient dose is crucially important for dose optimisation and justification. However, there are currently no national diagnostic reference level (NDRL) has been established in Malaysia for dental radiography. This study was aimed to evaluate the patient doses received from digital dental radiography which includes orthopantomogram (OPG), cone beam computed tomography (CBCT), and cephalometric examinations at Advanced Medical and Dental Institute (AMDI), Malaysia and serves as preliminary work in establishment of local DRL. The data of dose-area product (DAP) values for all dental examinations performed were gathered started from May 2015 until March 2017. For comparative study, the third quartiles for each examination were determined and compared with the international DRL. A total of 684 cases, consisting of OPG (67%), CBCT (6%), and cephalometric examinations (27%) performed during that period. The DAP values were ranged between 47.4 and 363.2 mGy cm2 for OPG, 392.4 and 1254.4 mGy cm2 for CBCT, and 17.4 and 33.3 mGy cm2 for cephalometric procedure. From the results, it showed that patient dose mainly depends on image acquisition protocol. Patient dose assessment is significant for radiation protection management in clinical practice.
KeywordsDigital dental radiography Dose-area product Diagnostic reference levels
The authors would like to thank all radiographers and staff at Imaging Unit, Clinical Trial Complex, AMDI USM, Malaysia for their help and support throughout this work.
- 3.IAEA (1996) International basic safety standards for protection against ionizing radiation and for the safety of radiation sourcesGoogle Scholar
- 4.ICRP (1996) ICRP Publication 73: radiological protection and safety in medicine, vol. 22. Elsevier Health SciencesGoogle Scholar
- 5.ICRP (2011) Cone beam CT for dental and maxillofacial radiology. Provisional guidelines A report prepared by the SEDENTEXCT project. Version 1. http://www.sedentexct.eu
- 6.ICRP (1999) Guidance on diagnostic reference levels (DRLs) for medical exposures: radiation protection 109: Directorate-General Environment, Nuclear Safety and Civil Protection, European CommissionGoogle Scholar
- 7.Hart D, Hillier MC, Shrimpton PC (2012) Doses to patients from radiographic and fluoroscopic x-ray imaging procedures in the UK—2010 review. HPA-CRCE-034. http://www.hpa.org.uk/Publications/Radiation/CRCEScientificAndTechnicalReportSeries/HPACRCE034
- 9.SEDENTEXCT Project (2011) Radiation protection: cone beam CT for dental and maxillofacial radiology. Evidence based guideline. www.sedentexct.eu/system/files/sedentexct_project_provisional_guidelines.pdf
- 10.Drage N, Walker A (n.d.). Faculty of general dental practice (UK). Radiation doses and risks in dental practice. http://www.fgdp.org.uk/publications/selection-criteria-for-dental-radiography1/2-use-of-ionising-radiation-/21-radiation-doses-and-risks-in-dental-practice.ashx