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Rare‐earth scatter fractions in chest radiography
Author(s) -
Petrone Thomas J.,
Steidley K. David
Publication year - 1993
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.597041
Subject(s) - radiography , imaging phantom , nuclear medicine , computed radiography , digital radiography , rare earth , contrast (vision) , radiology , medicine , optics , materials science , physics , computer science , image quality , artificial intelligence , metallurgy , image (mathematics)
A beam stop technique was used to measure the densitometric scatter fractions under three regions of a humanoid chest phantom utilizing LaOBr and Gd 2 O 2 S screens. For these receptors, the scatter fractions under the lung and retrocardiac areas were 13%–36% lower than published values for CaWO 4 . In the mediastinal area, there was no significant difference between the CaWO 4 and rare‐earth phosphors. The use of grids reduces the scatter fraction in all three regions by 40%–75%. With and without a grid, radiographic contrast with Gd 2 O 2 S was measured utilizing simulated lesions placed above the lung and retrocardiac areas.
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