Objectives. This study investigated the effect of the size of the sensitive area of the charge-coupled devices (CCD) used in digital intraoral radiographic systems on the patient effective dose in full-mouth radiographic examinations. Methods. The effective dose was assessed in full-mouth radiographic examinations using the bisecting angle technique, while assuming that CCD sensitivity is equivalent to that of E-speed film. The results were compared with the effective doses obtained using E-speed film. The tube potentials used were 70, 80, and 90 kV. The diameter of the circular field at the cone tip was 7 cm, and the length of the spacer cone was 20 cm. Twelve types of CCD devices with sensitive areas ranging from 307 to 1200 mm 2 were assessed in seven digital intraoral radiographic systems. Results. The number of exposures and effective dose using the CCD devices were inversely proportional to the sensitive area of the CCD. Both the number of exposures and the effective dose were increased when using a CCD with a sensitive area smaller than the intraoral film size. Consequently, a reduction in the patient dose did not occur to the extent expected, based on the relative sensitivity of the CCD to film. Conclusions. In order to fully realize the advantages of a CCD, it will be necessary both to reduce the frequency of examinations and to use a rectangular-shaped beam in CCD-based intraoral radiographic systems.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations鈥揷itations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright 漏 2024 scite LLC. All rights reserved.
Made with 馃挋 for researchers
Part of the Research Solutions Family.