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Tytuł pozycji:

Dosimetric and bremsstrahlung performance of a single convergent beam for teletherapy device.

Tytuł:
Dosimetric and bremsstrahlung performance of a single convergent beam for teletherapy device.
Autorzy:
Figueroa RG; Departamento de Ciencias Físicas, Universidad de La Frontera, Temuco, Chile; Centro de Física e Ingeniería en Medicina - CFIM, Universidad de La Frontera, Temuco, Chile. Electronic address: .
Santibáñez M; Departamento de Ciencias Físicas, Universidad de La Frontera, Temuco, Chile; Centro de Física e Ingeniería en Medicina - CFIM, Universidad de La Frontera, Temuco, Chile.
Valente M; Instituto de Física E. Gaviola, CONICET & Universidad Nacional de Córdoba, Argentina; Departamento de Ciencias Físicas, Universidad de La Frontera, Temuco, Chile; Centro de Física e Ingeniería en Medicina - CFIM, Universidad de La Frontera, Temuco, Chile.
Źródło:
Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB) [Phys Med] 2016 Dec; Vol. 32 (12), pp. 1489-1494. Date of Electronic Publication: 2016 Nov 17.
Typ publikacji:
Journal Article
Język:
English
Imprint Name(s):
Publication: Pisa : Istituti Editoriali e Poligrafici Internazionali
Original Publication: Lugano, Switzerland : Giardini editori S.A.,
MeSH Terms:
Radioisotope Teletherapy/*instrumentation
Feasibility Studies ; Monte Carlo Method ; Optics and Photonics ; Photons/therapeutic use ; Radiometry ; Radiotherapy Dosage ; Scattering, Radiation
Contributed Indexing:
Keywords: Convergent beam radiotherapy (CBRT); Dosimetry; Monte Carlo simulations
Entry Date(s):
Date Created: 20161122 Date Completed: 20170331 Latest Revision: 20170331
Update Code:
20240105
DOI:
10.1016/j.ejmp.2016.10.003
PMID:
27866897
Czasopismo naukowe
The present work investigates preliminary feasibility and characteristics of a new type of radiation therapy modality based on a single convergent beam of photons. The proposal consists of the design of a device capable of generating convergent X-ray beams useful for radiotherapy. The main goal is to achieve high concentrated dose delivery. The first step is an analytical approach in order to characterize the dosimetric performance of the hypothetical convergent photon beam. Then, the validated FLUKA Monte Carlo main code is used to perform complete radiation transport to account also for scattering effects. The proposed method for producing convergent X-rays is mainly based on the bremsstrahlung effect. Hence the operating principle of the proposed device is described in terms of bremsstrahlung production. The work is mainly devoted characterizing the effect on the bremsstrahlung yield due to accessories present in the device, like anode material and geometry, filtration and collimation systems among others. The results obtained for in-depth dose distributions, by means of analytical and stochastic approaches, confirm the presence of a high dose concentration around the irradiated target, as expected. Moreover, it is shown how this spot of high dose concentration depends upon the relevant physical properties of the produced convergent photon beam. In summary, the proposed design for producing single convergent X-rays attained satisfactory performance for achieving high dose concentration around small targets depending on beam spot size that may be used for some applications in radiotherapy, like radiosurgery.
(Copyright © 2016 Associazione Italiana di Fisica Medica. Published by Elsevier Ltd. All rights reserved.)

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