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- W2378911704 abstract "Objective: To evaluate the effect of different sized block on high electron beam.Methods: we measure the field output factors at 4 MeV~18 MeV nominal electron energies for 5 different applicators and different sized blocking fields at 95 cm~115 cm SSD on Elekta Precise linear accelerator and analyse relationships between output factors and field size for different energies.Results: ① It shows there is no determined field-size dependence of output factors for standard applicators,because the X-ray jaw's setting varies from each energy and applicator in order to achieve uniform dose distribution of electron beam.②The output of blocking field drcreases rapidly as the field size is reduced to a very small one.And when the field dimension is smaller than the range of electron,the output will be effected.③The output factors for same size blocking field with different applicators become larger at lower energy and for larger applicator.④Ihe measurement at different SSD shows similar results,but the output at larger air gaps decreases more sharply at smaller field size and lower energies." @default.
- W2378911704 created "2016-06-24" @default.
- W2378911704 creator A5009334041 @default.
- W2378911704 date "2005-01-01" @default.
- W2378911704 modified "2023-09-27" @default.
- W2378911704 title "Output doses Characteristics of High Energy Electron Beam of Elekta Precise Linear Accelerator" @default.
- W2378911704 hasPublicationYear "2005" @default.
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