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Corrections to absorbed dose calculations for tissue inhomogeneities
Author(s) -
Sontag Marc R.,
Cunningham J. R.
Publication year - 1977
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 - 10.1118/1.594329
Subject(s) - dosimetry , absorbed dose , materials science , physics , computational physics , optics , nuclear medicine , medicine
Traditional methods for correcting for the presence of tissue inhomogeneities may produce errors as great as 10% at points within or close to the inhomogeneity. A more accurate method is presented which employs tissue–air ratios raised to some power dependent on the relative electron densities of the inhomogeneities involved. Corrections may be made for points that lie within or below an inhomogeneity as well as for multiple inhomogeneities. Measurements were made in phantoms containing aluminum or cork inhomogeneities. Agreement between measured and predicted results was usually within 2%–3%.