| Subject | Predicate | Object | Context |
|---|---|---|---|
| pubmed-article:7643788 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:7643788 | lifeskim:mentions | umls-concept:C0439742 | lld:lifeskim |
| pubmed-article:7643788 | lifeskim:mentions | umls-concept:C0032863 | lld:lifeskim |
| pubmed-article:7643788 | lifeskim:mentions | umls-concept:C1441506 | lld:lifeskim |
| pubmed-article:7643788 | lifeskim:mentions | umls-concept:C0936012 | lld:lifeskim |
| pubmed-article:7643788 | lifeskim:mentions | umls-concept:C1551075 | lld:lifeskim |
| pubmed-article:7643788 | pubmed:issue | 5 | lld:pubmed |
| pubmed-article:7643788 | pubmed:dateCreated | 1995-9-15 | lld:pubmed |
| pubmed-article:7643788 | pubmed:abstractText | Values of electron mass scattering power, T/p, for various materials have been calculated by using the EGS4 Monte Carlo system and by integration of the Molière multiple-scattering distribution. The energy range covered is 0.5-100 MeV. Monte Carlo calculations test the concept of T/p "experimentally" and assess the contribution to electron mass scattering power from effects such as Moller scatter and energy-loss straggling. The Monte Carlo results agree within 2% with the analytical results calculated from Molière multiple-scattering theory at energies less than 20 MeV for high-Z materials and for energies less than 50 MeV for low-Z materials. At higher energies the Monte Carlo calculations include the effects of bremsstrahlung production which can significantly increase values of T/p. For low-Z materials and electron energies less than 60 MeV, the Monte Carlo calculated T/p values are generally 22% higher than those given by ICRU Report 35, while those for high-Z materials and energies less than 25 MeV are found to be consistent (within 1%) with ICRU Report 35. The effects of Moller scatter, which significantly affect T/p for low-Z materials, as well as bremsstrahlung effects, are included in the present Monte Carlo calculations. If the tabulated T/p data of ICRU Report 35 are modified to include the Moller scatter effect, then for energies less than 60 MeV they are generally 6% less than the present Monte Carlo data for low-Z materials as well as for copper. It is shown that T/p is a well-defined constant over an appropriate range of slab thickness except when bremsstrahlung effects are significant. It is found that T/p is proportional to E-n, where n is in the range of 1.5-2.0 for the energies considered here. The Monte Carlo calculations are shown to agree well with various relevant experimental measurements. Accurate T/p data, which should include the effect of Moller scatter, are necessary in electron-beam treatment planning, especially for a small field size. The choice of the depth step in the implementation of pencil-beam codes should not violate the slab-thickness limits for T/p data. | lld:pubmed |
| pubmed-article:7643788 | pubmed:language | eng | lld:pubmed |
| pubmed-article:7643788 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:7643788 | pubmed:citationSubset | IM | lld:pubmed |
| pubmed-article:7643788 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:7643788 | pubmed:month | May | lld:pubmed |
| pubmed-article:7643788 | pubmed:issn | 0094-2405 | lld:pubmed |
| pubmed-article:7643788 | pubmed:author | pubmed-author:RogersD WDW | lld:pubmed |
| pubmed-article:7643788 | pubmed:author | pubmed-author:LiX AXA | lld:pubmed |
| pubmed-article:7643788 | pubmed:issnType | lld:pubmed | |
| pubmed-article:7643788 | pubmed:volume | 22 | lld:pubmed |
| pubmed-article:7643788 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:7643788 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:7643788 | pubmed:pagination | 531-41 | lld:pubmed |
| pubmed-article:7643788 | pubmed:dateRevised | 2006-11-15 | lld:pubmed |
| pubmed-article:7643788 | pubmed:meshHeading | pubmed-meshheading:7643788-... | lld:pubmed |
| pubmed-article:7643788 | pubmed:meshHeading | pubmed-meshheading:7643788-... | lld:pubmed |
| pubmed-article:7643788 | pubmed:meshHeading | pubmed-meshheading:7643788-... | lld:pubmed |
| pubmed-article:7643788 | pubmed:meshHeading | pubmed-meshheading:7643788-... | lld:pubmed |
| pubmed-article:7643788 | pubmed:meshHeading | pubmed-meshheading:7643788-... | lld:pubmed |
| pubmed-article:7643788 | pubmed:meshHeading | pubmed-meshheading:7643788-... | lld:pubmed |
| pubmed-article:7643788 | pubmed:meshHeading | pubmed-meshheading:7643788-... | lld:pubmed |
| pubmed-article:7643788 | pubmed:meshHeading | pubmed-meshheading:7643788-... | lld:pubmed |
| pubmed-article:7643788 | pubmed:year | 1995 | lld:pubmed |
| pubmed-article:7643788 | pubmed:articleTitle | Electron mass scattering powers: Monte Carlo and analytical calculations. | lld:pubmed |
| pubmed-article:7643788 | pubmed:affiliation | Institute for National Measurement Standards, National Research Council, Canada, Ottawa. | lld:pubmed |
| pubmed-article:7643788 | pubmed:publicationType | Journal Article | lld:pubmed |
| pubmed-article:7643788 | pubmed:publicationType | Comparative Study | lld:pubmed |
| pubmed-article:7643788 | pubmed:publicationType | Research Support, Non-U.S. Gov't | lld:pubmed |
| http://linkedlifedata.com/r... | pubmed:referesTo | pubmed-article:7643788 | lld:pubmed |