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Dose calculations algorithm for narrow heavy charged-particle beams

Abstract

The dose distributional advantages of the heavy charged-particles can be fully exploited by using very efficient and accurate dose calculation algorithms, which can generate optimal three-dimensional scanning patterns. An inverse therapy planning algorithm for dynamically scanned, narrow heavy charged-particle beams is presented in this paper. The irradiation `start point` is defined at the distal end of the target volume, right-down, in a beam`s eye view. The peak-dose of the first elementary beam is set to be equal to the prescribed dose in the target volume, and is defined as the reference dose. The weighting factor of any Bragg-peak is determined by the residual dose at the point of irradiation, calculated as the difference between the reference dose and the cumulative dose delivered at that point of irradiation by all the previous Bragg-peaks. The final pattern consists of the weighted Bragg-peaks irradiation density. Dose distributions were computed using two different scanning steps equal to 0.5 mm, and 1 mm respectively. Very accurate and precise localized dose distributions, conform to the target volume, were obtained. (authors) 6 refs., 3 figs.
Authors:
Barna, E A; Kappas, C; [1]  Scarlat, F [2] 
  1. Department of Medical Physics, School of Medicine, University of Patras (Greece)
  2. National Institute for Laser and Plasma Physics, Bucharest (Romania)
Publication Date:
Dec 31, 1998
Product Type:
Conference
Report Number:
INIS-CY-0004; CONF-9806202-
Reference Number:
SCA: 550603; PA: AIX-30:017101; EDB-99:043431; SN: 99002082144
Resource Relation:
Conference: 8. Mediterranean conference on medical and biological engineering and computing (Medicon `98), Lemesos (Cyprus), 14-17 Jun 1998; Other Information: DN: 6 refs., 3 figs. The proceedings of this meeting are available on CD-ROM in PDF, at the price of US$50, from the Cyprus Association of Medical Physics and Biomedical Engineering, P.O.Box 24039, 1700 Nicosia, Cyprus. The CD-ROM makes use of Abode Acrobat PDF (Portable Document Format). To read the files the Abode Acrobat reader has to be installed on your system. A copy is provided with the CD-ROM; PBD: 1998; Related Information: Is Part Of Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon `98); Christofides, Stelios; Pattichis, Constantinos; Schizas, Christos; Keravnou-Papailiou, Elpida; Kaplanis, Prodromos; Spyros, Spyrou; Christodoulides, George; Theodoulou, Yiannis [eds.]; PB: 220 p.
Subject:
55 BIOLOGY AND MEDICINE, BASIC STUDIES; ALGORITHMS; CHARGED PARTICLES; HEAVY IONS; ION BEAMS; RADIATION DOSE DISTRIBUTIONS; RADIOTHERAPY
OSTI ID:
331908
Research Organizations:
Cyprus Association of Medical Physics and Biomedical Engineering (CAMPBE), Nicosia (Cyprus); The Department of Computer Science, University of Cyprus, Nicosia (Cyprus)
Country of Origin:
Cyprus
Language:
English
Other Identifying Numbers:
Other: ON: DE99619912; ISBN 9963-607-14-4; TRN: CY9900024017101
Availability:
INIS; OSTI as DE99619912
Submitting Site:
INIS
Size:
pp. 147
Announcement Date:

Citation Formats

Barna, E A, Kappas, C, and Scarlat, F. Dose calculations algorithm for narrow heavy charged-particle beams. Cyprus: N. p., 1998. Web.
Barna, E A, Kappas, C, & Scarlat, F. Dose calculations algorithm for narrow heavy charged-particle beams. Cyprus.
Barna, E A, Kappas, C, and Scarlat, F. 1998. "Dose calculations algorithm for narrow heavy charged-particle beams." Cyprus.
@misc{etde_331908,
title = {Dose calculations algorithm for narrow heavy charged-particle beams}
author = {Barna, E A, Kappas, C, and Scarlat, F}
abstractNote = {The dose distributional advantages of the heavy charged-particles can be fully exploited by using very efficient and accurate dose calculation algorithms, which can generate optimal three-dimensional scanning patterns. An inverse therapy planning algorithm for dynamically scanned, narrow heavy charged-particle beams is presented in this paper. The irradiation `start point` is defined at the distal end of the target volume, right-down, in a beam`s eye view. The peak-dose of the first elementary beam is set to be equal to the prescribed dose in the target volume, and is defined as the reference dose. The weighting factor of any Bragg-peak is determined by the residual dose at the point of irradiation, calculated as the difference between the reference dose and the cumulative dose delivered at that point of irradiation by all the previous Bragg-peaks. The final pattern consists of the weighted Bragg-peaks irradiation density. Dose distributions were computed using two different scanning steps equal to 0.5 mm, and 1 mm respectively. Very accurate and precise localized dose distributions, conform to the target volume, were obtained. (authors) 6 refs., 3 figs.}
place = {Cyprus}
year = {1998}
month = {Dec}
}