title: Evaluation of aluminum-yttrium filtration for intraoral radiography.
abstract: In comparison with the use of traditional aluminum filtration, a radiation dose reduction of 40% at 90 kVp and 25% at 70 kVp was found with the use of aluminum-yttrium (Al-Y) filtration for intraoral bitewing and periapical radiographs. An increased exposure time, and consequent greater tube loading, was necessary to maintain film density. Extended gray-scales (i.e., reduced radiographic contrast) occurred at both energy levels tested with the use of Al-Y filtration. Subjective evaluation of image quality in terms of clarity, resolution, and contrast was carried out independently by nine periodontologists. Despite some interoperator variance, there was a preponderant preference for traditional aluminum filtration.
authors.affiliation: School of Dentistry, University of Louisville, Ky.
authors.forename: A G
authors.initials: AG
authors.lastname: Farman
authors.forename: C
authors.initials: C
authors.lastname: Perez
authors.forename: A
authors.initials: A
authors.lastname: Jacobson
authors.forename: M S
authors.initials: MS
authors.lastname: Kelly
mesh_terms: D000535:Aluminum; D005069:Evaluation Studies as Topic; D005374:Filtration / Q000295:instrumentation*; D006801:Humans; D011861:Radiography, Dental / Q000379:methods*; D015019:Yttrium
chemical_list: D015019:Yttrium; D000535:Aluminum