Space constraints often present the greatest challenge in determining the lay-out of specific radiotherapy installations. To fulfill these constraints high density concrete is often employed in construction. We have undertaken a study to establish the transmission of primary, leakage and scatter radiation through a particular type of high density concrete. In the course of this study various characteristics of leakage and scatter radiation from a 10 MV linac have also been investigated. The results of these studies are reported in this thesis. / To establish the correct chamber configuration required for the characterization of the transmission factors for primary, leakage and scatter radiation and to determine the scatter-to-incidence dose ratio a, we have measured the build-up curves and verified the validity of the inverse square law for these different radiations. The build-up data for the radiation scattered from a humanoid phantom at different angles from the primary axis have shown that even at low scatter angles little to no build-up is required for scatter radiation measurements.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.23398 |
| Date | January 1995 |
| Creators | Frenière, Normand |
| Contributors | Schreiner, L. John (advisor), Podgorsak, Ervin B. (advisor) |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | French |
| Detected Language | English |
| Type | Electronic Thesis or Dissertation |
| Format | application/pdf |
| Coverage | Master of Science (Department of Medical Radiation Physics.) |
| Rights | All items in eScholarship@McGill are protected by copyright with all rights reserved unless otherwise indicated. |
| Relation | alephsysno: 001481435, proquestno: MM12195, Theses scanned by UMI/ProQuest. |
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