Please use this identifier to cite or link to this item: http://gukir.inflibnet.ac.in:8080/jspui/handle/123456789/4454
Title: Energy absorption buildup factors of human organs and tissues at energies and penetration depths relevant for radiotherapy and diagnostics
Authors: Manohara S.R
Hanagodimath S.M
Gerward L.
Keywords: Buildup factor
Effective atomic number
Gamma radiation
GP fitting formula
Human organs and tissues
Interaction of gamma/X-ray radiation with matter
Tissue equivalence
Issue Date: 2011
Citation: Journal of Applied Clinical Medical Physics , Vol. 12 , 4 , p. 296 - 312
Abstract: Energy absorption geometric progression (GP) fitting parameters and the corresponding buildup factors have been computed for human organs and tissues, such as adipose tissue, blood (whole), cortical bone, brain (grey/white matter), breast tissue, eye lens, lung tissue, skeletal muscle, ovary, testis, soft tissue, and soft tissue (4-component), for the photon energy range 0.015-15 MeV and for penetration depths up to 40 mfp (mean free path). The chemical composition of human organs and tissues is seen to influence the energy absorption buildup factors. It is also found that the buildup factor of human organs and tissues changes significantly with the change of incident photon energy and effective atomic number, Zeff. These changes are due to the dominance of different photon interaction processes in different energy regions and different chemical compositions of human organs and tissues. With the proper knowledge of buildup factors of human organs and tissues, energy absorption in the human body can be carefully controlled. The present results will help in estimating safe dose levels for radiotherapy patients and also useful in diagnostics and dosimetry. The tissue-equivalent materials for skeletal muscle, adipose tissue, cortical bone, and lung tissue are also discussed. It is observed that water and MS20 are good tissue equivalent materials for skeletal muscle in the extended energy range.
URI: 10.1120/jacmp.v12i4.3557
http://gukir.inflibnet.ac.in:8080/jspui/handle/123456789/4454
Appears in Collections:1. Journal Articles

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