Water versus DNA: New insights into proton track-structure modeling in radiobiology and radiotherapy
Journal Article
·
· Physics in Medicine and Biology
- Univ. de Bordeaux, CNRS/IN2P3, Gradignan (France)
- CONICET and Univ. Nacional de Rosario, Rosario (Argentina)
- 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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