Effects of dose reduction on the detectability of standardized radiolucent lesions in digital panoramic radiography

Dula, K; Sanderink, G; van der Stelt, PF; Mini, R; Buser, D (1998). Effects of dose reduction on the detectability of standardized radiolucent lesions in digital panoramic radiography. Oral surgery, oral medicine, oral pathology, oral radiology and endodontology, 86(2), pp. 227-33. Orlando, Fla.: Elsevier 10.1016/S1079-2104(98)90130-5

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Dose reduction in digital panoramic radiography was studied. Intentional underexposure was performed with the Orthophos DS while six different human mandibles were radiographed. Exposure settings were 69 kV/15 mA (standard), 64 kV/16 mA, and 60 kV/16 mA. Standardized spherical defects, each either 1 or 1.25 mm in diameter, were simulated in 288 of 432 images, and seven observers decided whether defects were present or not. Areas under the receiver operating characteristics curves were calculated. They showed no significant differences in the detectability of the 1-mm defect at 69, 64, or 60 kV. For the 1.25-mm defect, no difference was found between the 69 and 60 kV images, but a statistically significant different detectability was found for 64 kV images in comparison with both 69 and 60 kV images. A dose reduction of up to 43% was ascertained with a Pedo-RT-Humanoid phantom when panoramic radiography was performed at 60 kV/16 mA. The conclusion is that with the Orthophos DS, it seems possible to reduce the dose rate of x-rays without loss of diagnostic quality in the case of radiolucent changes.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Department of Haematology, Oncology, Infectious Diseases, Laboratory Medicine and Hospital Pharmacy (DOLS) > Clinic of Radiation Oncology > Medical Radiation Physics

UniBE Contributor:

Mini, Roberto










Factscience Import

Date Deposited:

04 Oct 2013 14:56

Last Modified:

05 Dec 2022 14:17

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https://boris.unibe.ch/id/eprint/24127 (FactScience: 47038)

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