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On beam quality and stopping power ratios for high-energy x-rays

Johnsson, Stefan LU ; Ceberg, Crister LU ; Knöös, Tommy LU and Nilsson, Per LU (2000) In Physics in Medicine and Biology 45(10). p.2733-2745
Abstract
The aim of this work is to quantitatively compare two commonly used beam quality indices, IPR(20/10) and %dd(10)x, with respect to their ability to predict stopping power ratios (water to air), s(w,air), for high-energy x-rays. In particular, effects due to a varied amount of filtration of the photon beam will be studied. A new method for characterizing beam quality is also presented, where the information we strive to obtain is the moments of the spectral distribution. We will show how the moments enter into a general description of the transmission curve and that it is possible to correlate the moments to s(w,air) with a unique and simple relationship. Comparisons with TPR(20/10) and %dd(10), show that the moments are well suited for... (More)
The aim of this work is to quantitatively compare two commonly used beam quality indices, IPR(20/10) and %dd(10)x, with respect to their ability to predict stopping power ratios (water to air), s(w,air), for high-energy x-rays. In particular, effects due to a varied amount of filtration of the photon beam will be studied. A new method for characterizing beam quality is also presented, where the information we strive to obtain is the moments of the spectral distribution. We will show how the moments enter into a general description of the transmission curve and that it is possible to correlate the moments to s(w,air) with a unique and simple relationship. Comparisons with TPR(20/10) and %dd(10), show that the moments are well suited for beam quality specification in terms of choosing the correct s(w,air). (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physics in Medicine and Biology
volume
45
issue
10
pages
2733 - 2745
publisher
IOP Publishing
external identifiers
  • pmid:11049168
  • scopus:0033776436
ISSN
1361-6560
DOI
10.1088/0031-9155/45/10/301
language
English
LU publication?
yes
id
30594be8-3ee7-4550-91be-bc05716afc82 (old id 1116901)
date added to LUP
2008-07-02 11:53:05
date last changed
2017-01-01 04:57:42
@article{30594be8-3ee7-4550-91be-bc05716afc82,
  abstract     = {The aim of this work is to quantitatively compare two commonly used beam quality indices, IPR(20/10) and %dd(10)x, with respect to their ability to predict stopping power ratios (water to air), s(w,air), for high-energy x-rays. In particular, effects due to a varied amount of filtration of the photon beam will be studied. A new method for characterizing beam quality is also presented, where the information we strive to obtain is the moments of the spectral distribution. We will show how the moments enter into a general description of the transmission curve and that it is possible to correlate the moments to s(w,air) with a unique and simple relationship. Comparisons with TPR(20/10) and %dd(10), show that the moments are well suited for beam quality specification in terms of choosing the correct s(w,air).},
  author       = {Johnsson, Stefan and Ceberg, Crister and Knöös, Tommy and Nilsson, Per},
  issn         = {1361-6560},
  language     = {eng},
  number       = {10},
  pages        = {2733--2745},
  publisher    = {IOP Publishing},
  series       = {Physics in Medicine and Biology},
  title        = {On beam quality and stopping power ratios for high-energy x-rays},
  url          = {http://dx.doi.org/10.1088/0031-9155/45/10/301},
  volume       = {45},
  year         = {2000},
}