Abstract
The introduction of cone-beam computed tomography (CBCT) for the maxillofacial imaging provided opportunities for dental practitioners to request multiplanar imaging. Currently CBCT is used during implant treatment-planning to measure accurately the height of bone available for implant placement to avoid serious problems e.g. compromising vital structure such as the inferior alveolar nerve during placement of implants. We present a physical method to assess the accuracy of measurements obtained from an i-CAT CBCT dental radiography unit used at king abdulaziz university hospital and to appraise the effect of voxel size on the accuracy of measurement by an i-CAT CBCT unit. Not significant difference was found between the physical and CBCT measurements for all the samples. The maximum measurements variation was + or -0.15 mm. Therefore, the linear measurements from i-CAT CBCT unit are accurate and the adjustment of the scan parameters like the FOV and voxel size will not significantly affect this accuracy.
Highlights
IntroductionWith the development of X-ray computed tomography (CT) in the 1960s, radiological tomography attained widespread use and today it’s one of the most essential imaging techniques in medical radiology
Radiology is an integral part of dental practice
We evaluated the accuracy of the i-CAT cone-beam computed tomography (CBCT) unit and studied the effect of different adjustment parameters to help to develop standards for imaging patients in dentistry
Summary
With the development of X-ray computed tomography (CT) in the 1960s, radiological tomography attained widespread use and today it’s one of the most essential imaging techniques in medical radiology. It is a technically mature and clinically widely accepted method and complements traditional radiology in many areas [1]. The cone beam technique, on the other hand, requires only a single scan to capture the entire object with a cone shaped of X-ray beam. Since it takes several fan beam scans to complete the imaging of a single object, the acquisition time for the fan beam tends to be much longer than with the cone beam. Because CBCT exposure incorporates the entire FOV, only one rotational sequence of the gantry is necessary to acquire enough data for image reconstruction [3]
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