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Interaction of ionizing radiation with matter
Stockholm University. (Department of physics)ORCID iD: 0000-0002-2766-5235
Karolinska institutet. (Department of Oncology-Pathology)
2014 (English)In: Comprehensive biomedical physics: vol. 9: radiation therapy physics and treatment optimization / [ed] Anders Brahme, Paris: Elsevier, 2014, 1, 1-36 p.Chapter in book (Other academic)
Abstract [en]

The aim of this chapter is to give an overview and try to show how the different interaction probabilities will influence the transport of ionizing radiation through matter. This knowledge is important in different aspects of medical applications of radiation. It has an impact in designing an optimal treatment gantry, in the choice of radiation quality, and of course when determining the absorbed dose distribution in the body. It is also important in diagnostic radiology when optimizing the image quality. Knowledge of the interaction of radiation with matter is also fundamental for understanding the biological effect of radiation and its variation with ionization density. The focus will not be on the basic physics and deriving the different cross sections but on the impact of these cross sections on imaging and therapy in medical physics applications.

Ionizing radiation is normally divided into charged particles (previously called directly ionizing radiation) such as leptons, α-particles, protons and other light ions, and uncharged particles (previously called indirectly ionizing radiation) such as photons (x-rays or γ-rays) and neutrons. This chapter will concentrate on radiation qualities used in radiotherapy, and the main part will be dedicated to electrons and photons with energies up to around 50 MeV and light ions with energies up to 900 MeV per nucleon. The presentation is divided into two main sections, charged particles and photons.

Place, publisher, year, edition, pages
Paris: Elsevier, 2014, 1. 1-36 p.
Keyword [en]
Ionizing radiation, interaction, photons, charged particles
National Category
Physical Sciences
URN: urn:nbn:se:su:diva-106994ISBN: 0444536329OAI: diva2:742411
Available from: 2014-09-01 Created: 2014-09-01 Last updated: 2016-05-04

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Nilsson, Bo
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