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Scatter rejection by air gaps: An empirical model
Author(s) -
Sorenson James A.,
Floch Jacqueline
Publication year - 1985
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 - 10.1118/1.595690
Subject(s) - imaging phantom , optics , context (archaeology) , range (aeronautics) , radiation , scattering , physics , materials science , geology , paleontology , composite material
Scatter rejection by air gaps was analyzed in the context of a model in which scattered radiation was treated as if it originated from an “effective scatter point source” (ESPS), located between the focal spot of the x‐ray tube and the exit surface of the phantom or patient. Excellent agreement was found between the ESPS model and scatter measurements performed on phantoms for a variety of experimental conditions. Values for X s (distance from phantom exit surface to effective scatter point source) were consistently in the range 15–20 cm. Applications of the model for predictions of scatter rejection by air gaps and comparisons to other scatter rejection methods are presented.