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Water versus DNA: New insights into proton track-structure modeling in radiobiology and radiotherapy

Journal Article · · Physics in Medicine and Biology
 [1];  [1];  [2];  [2];  [3];  [2];  [2];  [2]
  1. Univ. de Bordeaux, CNRS/IN2P3, Gradignan (France)
  2. CONICET and Univ. Nacional de Rosario, Rosario (Argentina)
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Water is a common surrogate of DNA for modelling the charged particle-induced ionizing processes in living tissue exposed to radiations. The present study aims at scrutinizing the validity of this approximation and then revealing new insights into proton-induced energy transfers by a comparative analysis between water and realistic biological medium. In this context, a self-consistent quantum mechanical modelling of the ionization and electron capture processes is reported within the continuum distorted wave-eikonal initial state framework for both isolated water molecules and DNA components impacted by proton beams. Their respective probability of occurrence-expressed in terms of total cross sections-as well as their energetic signature (potential and kinetic) are assessed in order to clearly emphasize the differences existing between realistic building blocks of living matter and the controverted water-medium surrogate. Thus the consequences in radiobiology and radiotherapy will be discussed in particular in view of treatment planning refinement aiming at better radiotherapy strategies.
Research Organization:
Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC04-94AL85000
OSTI ID:
1236225
Alternate ID(s):
OSTI ID: 22505166
Report Number(s):
SAND--2015-1838J; 579662
Journal Information:
Physics in Medicine and Biology, Journal Name: Physics in Medicine and Biology Journal Issue: 20 Vol. 60; ISSN 0031-9155
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (7)

Proton transport modeling in a realistic biological environment by using TILDA-V journal October 2019
Electron Nuclear Dynamics Simulations of Proton Cancer Therapy Reactions: Water Radiolysis and Proton- and Electron-Induced DNA Damage in Computational Prototypes journal May 2018
Auger electron emission in proton‐induced interactions in living matter: A TILDA‐V Monte Carlo tracking journal April 2019
Electron capture by swift ions from molecules of biological interest journal July 2018
The role of multiple ionization of H 2 O in heavy ion collisions journal October 2019
Double ionization of water molecules by proton impact: the role of the direct ionization mechanism journal June 2018
Exploring water radiolysis in proton cancer therapy: Time-dependent, non-adiabatic simulations of H+ + (H2O)1-6 journal April 2017

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