منابع مشابه
AbstractID: 1109 Title: Integral Dose in External Beam Photon Radiotherapy
ID: 1109 Title: Integral Dose in External Beam Photon Radiotherapy Integral dose is the volume integral of the dose deposited in the patient and is equal to the mean dose times the volume. The integral dose is also the area under the curve of a differential dose absolute-volume histogram. It is widely believed that IMRT increases the integral dose to normal tissues as compared to conventional r...
متن کاملThe effect of high energy photon beam in dose- volume parameters and integral dose of normal structures in Head and neck IMRT
Introduction: The aim of this study is to investigate the effect of partially used high photon energies on dosimetric parameters and integral doses of nasopharynx IMRT plans. Materials and Methods: Two 7 coplanar IMRT plan were created for eleven patients (6 MV only IMRT plan in both phase1 and phase2 and 6 MV phase1-mixed energies (6 MV and 15 MV) phase2...
متن کامل4D in-beam PET of moving targets for different irradiation scenarios
Introduction Ion therapy allows a high precision, tumor conformal dose application but it is very sensitive to density changes along the beam path. Intra-fractional tumor motion due to respiration increases the risk of an incorrect irradiation and thus requires a reliable dosimetry as it was done by means of 3D in-beam PET for more than 400 patients at the experimental heavy ion treatment facil...
متن کاملElectron Beam Irradiation Applications
The irradiation of materials with electron beams or X rays is used extensively to enhance or modify their physical, chemical or biological properties. These electron beam “irradiators” cover a very wide range of accelerators technology, beam current and energies to produce a wide variety of products, mostly with polymers. They also are used for curing ink, coatings, and adhesives as well as for...
متن کاملAnalysis of a Beam under Moving Loads
Abstract: It is assumed that a beam made of material has a physical nonlinear behavior. This beam is analyzed under the moving concentrated and distributed continuous loads. The vibration equations of motion are derived from the Hamilton's Principle and Euler–Lagrange Equation. In this study, the amplitude of vibration, circular frequency, bending moment, stress and deflection of the beam has b...
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ژورنال
عنوان ژورنال: Acta Radiologica
سال: 1959
ISSN: 0001-6926
DOI: 10.3109/00016925909171100