Estimation of Effective Radiation Dose to the Eye Lens in Dental Cone Beam Computed Tomography

ABSTRACT

@#Introduction: Recent advancement in technology, has significantly improved the clinical application of Cone Beam Computed Tomography in the field of dentistry. The main objective of this study is to estimate the effective dose to the eye lens in Cone Bean Computed Tomography. Method: The effective dose to the lens of the eye was estimated using Dose Area Product (DAP) values from i-CAT 17-19 Platinum CBCT scanner during the CBCT examination of either the maxilla or mandible, with an exposure parameters of 120kVp and mAs 37.07. Results: The estimated effective dose for lens of the eye is 8.0±2.49mSv for voxel size 0.2 whereas 6.21±1.55mSv for voxel size 0.25 for CBCT of Mandible and 5.74±1.73mSv for voxel size 0.2 whereas 5.28±1.35mSv for voxel size 0.25 for CBCT of Maxilla. Conclusion: The effective dose to the lens of eyes for a standard protocols 0.2voxel with 26.9 sec and 0.25 voxel with 26.9 sec in CBCT for maxilla and mandible respectively are within the threshold limit of 2.0Gy. Therefore for further reduction of the effective dose to the lens of the eyes we recommend for developing a protocol with lower radiation dose and also implement the application of using an effective protective measures such as bismuth eye shield.