Cone-beam computed tomography (CBCT) is a widely used imaging modality in dentistry, with applications found in several subspecialties such as implant planning and endodontics. The ever-increasing use of CBCT has raised concerns regarding its impact on the collective dose; whereas it has been shown that a highly optimized CBCT scan is able to reach patient doses similar to panoramic radiography, high-dose protocols with exposure levels similar to (or higher than) multi-detector CT have been reported in literature. 
A commonly used optimization technique in CT...
Description of activity and work performed
An anthropomorphic phantom representing an adult male (CIRS ATOM Max 711-HN) was used. The phantom consists of tissue-equivalent materials and provides an anatomically accurate representation of the bones, teeth, soft tissues and air cavities. The phantom was scanned using the 3D Accuitomo 170 CBCT (J. Morita, Kyoto, Japan) using theFOVs indicated in Table 1. The tube voltage (90 kV) and exposure time (17.5 s) were fixed for all scans. The tube current was set at 5 mA, which is the standard setting...
Conclusion and recommendations
Angular TCM can be strongly recommended for dental CBCT, as it can lead to dose reduction without image quality impairment. The consistency between different FOV sizes and positions imply that TCM can be implemented in a straightforward manner using predetermined sinusoidal curves. In other words, a real-time feedback system between detector and X-ray tube is not needed. For small-FOV examinations of the TMJ or ear, the benefit of TCM would be rather limited becase the signal is relatively constant, probably due to the presence of...
R. Pauwels; Aarhus/DK - Research/Grant Supportby European Union Horizon 2020 Research and Innovation Programme under the Marie Skłodowska-Curie grant agreement number 754513 and by Aarhus University Research Foundation.
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Papadakis AE, Damilakis J (2019)Automatic Tube Current Modulation and Tube Voltage Selection in Pediatric Computed Tomography: A Phantom Study on Radiation Dose and Image Quality.Invest Radiol.54:265-272. doi: 10.1097/RLI.0000000000000537.
Stratis A, Zhang G, Lopez-Rendon X, et al. (2017)Two examples of indication specific radiation dose calculations in dental CBCT and Multidetector CT scanners.Phys Med. 41:71-77. doi:...