Comparison of diagnostic accuracy of digital imaging by using CCD and CMOS-APS sensors with E-speed film in the detection of periapical bony lesions

Abstract

Objective: The purpose of this study was to compare E-speed Plus film and digital imaging with a charge-coupled device (CCD) sensor and a complementary metal-oxide semiconductor active pixel sensor (CMOS-APS) in the detection of periapical bone lesions.

Study design: Periapical lesions were created in the cortical and trabecular bone of 10 dried human mandibles. Seventy radio-graphic images and 140 digital images were evaluated by 6 endodontists and 2 radiologists. Receiver operating characteristics curves and analysis of variance were used for statistical analysis.Results. No statistically significant differences were found between film, CCD, and CMOS-APS systems. Lesion detection occurred with significantly greater accuracy in cortical bone than in trabecular bone, as well as when the cortical plate was involved.

Conclusions: That no differences were found between the two sensors lends support for the use of CMOS-APS sensors, which require less system power and may have longer life spans than CCD sensors. Digital imaging required 50% less radiation than film to obtain the same diagnostic information.