Effects of aluminum-copper alloy filtration on photon spectra, air kerma rate and image contrast

Brazilian Dental Journal

Andréa Gonçalves²  João Manuel Domingos De Almeida Rollo¹  Marcelo Gonçalves²  Francisco Haiter Neto¹  Frab Norberto Bóscolo¹ 

[1] ,UNESP Araraquara Dental School Division of Dentomaxillofacial RadiologyAraraquara SP ,Brazil

关键词: filtration;    dental radiography;    alloys;   

DOI  :  10.1590/S0103-64402004000300010

来源: SciELO

【 摘 要 】

This study evaluated the performance of aluminum-copper alloy filtration, without the original aluminum filter, for dental radiography in terms of x-ray energy spectrum, air kerma rate and image quality. Comparisons of various thicknesses of aluminum-copper alloy in three different percentages were made with aluminum filtration. Tests were conducted on an intra-oral dental x-ray machine and were made on mandible phantom and on step-wedge. Depending on the thickness of aluminum-copper alloy filtration, the beam could be hardened and filtrated. The use of the aluminum-copper alloy filter resulted in reductions in air kerma rate from 8.40% to 47.33%, and indicated the same image contrast when compared to aluminum filtration. Aluminum-copper alloy filtration may be considered a good alternative to aluminum filtration.

【 授权许可】

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