Radiation dosage reduction in general dental practice using digital intraoral radiographic systems.
This report describes the radiation dosage reduction possible in the general dental practice with two CCD (charge-coupled device)-based intraoral radiographic systems: the RVG-S (Trophy Radiologie, Vincennes, France) and the Sens-A-Ray (Regam Medical Systems, Sundsvall, Sweden). Radiation dosages (air-kerma; Gy) necessary for obtaining clinically acceptable images were measured at the cone tip using an ionization chamber type 660-1 (Nuclear Associates, Victoreen, Inc., Carle Place, New York, USA). When the RVG-S was used with an Oramatic 70 (Trophy Radiologie) X-ray generator, dosages at the cone tip ranged from 322 to 612 microGy. These corresponded to 40-60% of the dosages necessary when using Ektaspeed dental X-ray film (Eastman Kodak, Rochester, New York, USA) with a Heliodent 70 (Siemens, Erlangen, Germany) X-ray generator. At 60 kVp, the Sens-A-Ray reduced the dosage in the order of 30% compared with Ektaspeed dental X-ray film. Reduction in radiation dosage is one of the benefits of digital intraoral radiographic systems in general dental clinics. The RVG-S provides greater dose savings than does the Sens-A-Ray.
Hayakawa
Y
Y
Department of Oral and Maxillofacial Radiology, Tokyo Dental College, Chiba, Japan.
Shibuya
H
H
Ota
Y
Y
Kuroyanagi
K
K
D005069:Evaluation Studies as Topic; D005792:General Practice, Dental; D006801:Humans; D011829:Radiation Dosage; D011861:Radiography, Dental / Q000295:instrumentation* / Q000379:methods; D014962:X-Ray Film