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

Stefan Johnsson; Crister Ceberg; Tommy Knöös; Per Nilsson

doi:10.1088/0031-9155/45/10/301

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

Stefan Johnsson, Crister Ceberg, Tommy Knöös, Per Nilsson

Medical Radiation Physics, Lund

Research output: Contribution to journal › Article › peer-review

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).

Original language	English
Pages (from-to)	2733-2745
Journal	Physics in Medicine and Biology
Volume	45
Issue number	10
DOIs	https://doi.org/10.1088/0031-9155/45/10/301
Publication status	Published - 2000

Subject classification (UKÄ)

Radiology and Medical Imaging

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10.1088/0031-9155/45/10/301

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title = "On beam quality and stopping power ratios for high-energy x-rays",

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 = "Stefan Johnsson and Crister Ceberg and Tommy Kn{\"o}{\"o}s and Per Nilsson",

year = "2000",

doi = "10.1088/0031-9155/45/10/301",

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T1 - On beam quality and stopping power ratios for high-energy x-rays

AU - Johnsson, Stefan

AU - Ceberg, Crister

AU - Knöös, Tommy

AU - Nilsson, Per

PY - 2000

Y1 - 2000

N2 - 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).

AB - 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).

U2 - 10.1088/0031-9155/45/10/301

DO - 10.1088/0031-9155/45/10/301

M3 - Article

SN - 1361-6560

VL - 45

SP - 2733

EP - 2745

JO - Physics in Medicine and Biology

JF - Physics in Medicine and Biology

IS - 10

ER -

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

Abstract

Subject classification (UKÄ)

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