Copper filtration in pediatric digital X-ray imaging: its impact on image quality and dose

Brosi, Philippe; Stuessi, Anja; Verdun, Francis R; Vock, Peter; Wolf, Rainer (2011). Copper filtration in pediatric digital X-ray imaging: its impact on image quality and dose. Radiological physics and technology, 4(2), pp. 148-55. Tokyo: Springer 10.1007/s12194-011-0115-4

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The effect of copper (Cu) filtration on image quality and dose in different digital X-ray systems was investigated. Two computed radiography systems and one digital radiography detector were used. Three different polymethylmethacrylate blocks simulated the pediatric body. The effect of Cu filters of 0.1, 0.2, and 0.3 mm thickness on the entrance surface dose (ESD) and the corresponding effective doses (EDs) were measured at tube voltages of 60, 66, and 73 kV. Image quality was evaluated in a contrast-detail phantom with an automated analyzer software. Cu filters of 0.1, 0.2, and 0.3 mm thickness decreased the ESD by 25-32%, 32-39%, and 40-44%, respectively, the ranges depending on the respective tube voltages. There was no consistent decline in image quality due to increasing Cu filtration. The estimated ED of anterior-posterior (AP) chest projections was reduced by up to 23%. No relevant reduction in the ED was noted in AP radiographs of the abdomen and pelvis or in posterior-anterior radiographs of the chest. Cu filtration reduces the ESD, but generally does not reduce the effective dose. Cu filters can help protect radiosensitive superficial organs, such as the mammary glands in AP chest projections.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Department of Radiology, Neuroradiology and Nuclear Medicine (DRNN) > Institute of Diagnostic, Interventional and Paediatric Radiology

UniBE Contributor:

Vock, Peter and Wolf, Rainer Walter








Factscience Import

Date Deposited:

04 Oct 2013 14:11

Last Modified:

06 Dec 2013 13:22

Publisher DOI:


PubMed ID:


URI: (FactScience: 204446)

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