Evaluation of aluminum-yttrium filtration for intraoral radiography.
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.
Farman
A G
AG
School of Dentistry, University of Louisville, Ky.
Perez
C
C
Jacobson
A
A
Kelly
M S
MS
D000535:Aluminum; D005069:Evaluation Studies as Topic; D005374:Filtration / Q000295:instrumentation*; D006801:Humans; D011861:Radiography, Dental / Q000379:methods*; D015019:Yttrium
D015019:Yttrium; D000535:Aluminum