title: The characteristics of dental X-ray fluoroscopic equipment 'DreamRay 60F'.
abstract: This study examined the characteristics of the dental X-ray fluoroscopic equipment, 'DreamRay 60F', which was recently developed in Korea. The output linearity, output reproducibility, half-value layer (HVL), leakage radiation and scattered radiation were measured using an ionisation chamber. The surface dose equivalent rate and estimated dose equivalent of the operator were also calculated. The output linearity was 0.0015-0.0175 and the coefficient of variation for the output reproducibility was 0.0013-0.0074. The experimental HVL was 2.1 mm Al, and the leakage dose rate at 100 cm from the X-ray focus ranged from 2.70 to 19.66 microGy h (-1) depending on the direction. The scattered radiation doses differed significantly (1.7-16.8 times) depending on the distance and direction. If an operator is exposed for 10 min per procedure, 5 procedures a day at 5 days a week, he/she sitting at a 90 degrees direction will receive an annual dose equivalent of 13.0 mSv (at 30 cm) and 63.7 mSv (at 50 cm) in the trunk and face surface, respectively.
authors.affiliation: Medical Physics Laboratory, Department of Radiological Technology, College of Health Science, Korea University, Seoul, Republic of Korea.
authors.forename: Gwi-Soon
authors.initials: GS
authors.lastname: Shin
authors.forename: Bo-Ram
authors.initials: BR
authors.lastname: Lee
authors.forename: Kyung-Hwan
authors.initials: KH
authors.lastname: Chang
authors.forename: In-Ja
authors.initials: IJ
authors.lastname: Lee
authors.forename: Wonho
authors.initials: W
authors.lastname: Lee
authors.forename: Jong-Hak
authors.initials: JH
authors.lastname: Choi
authors.forename: You-Hyun
authors.initials: YH
authors.lastname: Kim
mesh_terms: D004867:Equipment Design; D005471:Fluoroscopy / Q000295:instrumentation* / Q000379:methods; D006801:Humans; D015233:Models, Statistical; D016273:Occupational Exposure; D011829:Radiation Dosage; D011861:Radiography, Dental / Q000295:instrumentation* / Q000379:methods; D011874:Radiometry / Q000379:methods*; D015203:Reproducibility of Results; D014965:X-Rays