Abstract
Background: Cone beam computed tomography (CBCT) imaging has been widely used for different dental applications over the last few years. It delivers a high dose of radiation compared to conventional imaging modalities. This study aimed to compare the accuracy of linear measurements conducted using a low dose CBCT protocol in comparison with direct skull linear measurements. Methods: Ten dry human skulls were included in the study. 12 linear measurements were measured directly on each skull between 23 chosen anatomical landmarks using a digital calliper. Radio-opaque markers were then glued on these anatomical landmarks. Each skull was then scanned using low dose CBCT protocol operated at 90 kVp, 7.1 mA, for 9 sec. Results: There was no statistically significant difference in the accuracy of linear measurements conducted using the low dose CBCT protocol when compared with direct linear measurements. Relative Dahlberg Error value ranged from 0.8% to 1.9%. Conclusion: Reducing mAs using a low dose CBCT protocol does not affect the accuracy of linear measurements used in craniofacial imaging tasks as compared with those taken directly on the skull by a digital calliper.
Highlights
Two-dimensional (2D) imaging techniques have been used in dentistry since 1896
This study aimed to compare the accuracy of linear measurements conducted using a low dose Cone beam computed tomography (CBCT) protocol in comparison with direct skull linear measurements
There was no statistically significant difference between the low dose CBCT measurements when compared to direct skull measurements
Summary
Two-dimensional (2D) imaging techniques have been used in dentistry since 1896. Despite its long clinical success, 2D imaging possesses a number of problems, including superimposition and magnification, which may result in interpretation problems of the images, whether it represents the anatomical structures and/or pathological conditions1.Lately, dental imaging techniques have advanced with the introduction of tomography. Cone beam computed tomography (CBCT) imaging has been widely used for different dental applications over the last few years. It delivers a high dose of radiation compared to conventional imaging modalities. This study aimed to compare the accuracy of linear measurements conducted using a low dose CBCT protocol in comparison with direct skull linear measurements. Results: There was no statistically significant difference in the accuracy of linear measurements conducted using the low dose CBCT protocol when compared with direct linear measurements. Conclusion: Reducing mAs using a low dose CBCT protocol does not affect the accuracy of linear measurements used in craniofacial imaging tasks as compared with those taken directly on the skull by a digital calliper
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