2004
DOI: 10.1259/bjr/32409995
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Evaluation of the use of six diagnostic X-ray spectra computer codes

Abstract: A knowledge of photon energy spectra emitted from X-ray tubes in radiology is crucial for many research domains in the medical field. Since spectrometry is difficult because of high photon fluence rates, a convenient solution is to use computational models. This paper describes the use of six computer codes based on semiempirical or empirical models. The use of the codes was assessed, notably by comparing theoretical half value layers and air kerma with measurements on five different X-ray tubes used in a rese… Show more

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Cited by 57 publications
(32 citation statements)
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“…The model-based methods usually generate spectra from empirical or semiempirical physical models [1][2][3][4][5][6] and the measurement-based methods reconstruct spectra from measured data, essentially making an indirect measurement of the spectra. [7][8][9][10][11][12][13][14][15][16] The transmission method is one of the measurement-based methods.…”
Section: Introductionmentioning
confidence: 99%
“…The model-based methods usually generate spectra from empirical or semiempirical physical models [1][2][3][4][5][6] and the measurement-based methods reconstruct spectra from measured data, essentially making an indirect measurement of the spectra. [7][8][9][10][11][12][13][14][15][16] The transmission method is one of the measurement-based methods.…”
Section: Introductionmentioning
confidence: 99%
“…[5][6][7][8][9][10] Some of these models, [7][8][9] amongst other approaches, 11 have been applied in a healthcare setting. 12 The values for the Thomson-Whiddington constants used in these latter cases were those calculated by Birch and Marshall, 7 using the extrapolated 45 transmission range data of Katz and Penfold. 13 The distribution in the energies of electrons at depth was ignored and backscatter was neglected.…”
Section: Introductionmentioning
confidence: 99%
“…The entire OBI CBCT system, which includes the X‐ray tube, beam defining system, the phantom, and the flat‐panel detector, was simulated (17) . The X‐ray spectrum was obtained from the Institute of Physics and Engineering in Medicine (IPEM) Report 78 (18) . A typical X‐ray energy spectrum was generated from a tungsten target at 125 kVp after Al filtering.…”
Section: Methodsmentioning
confidence: 99%