The Enhanced Dynamic Wedge (EDW) is an intensity modulated radiation therapy technique found in certain linear accelerators used in radiation oncology. Invoking the EDW causes one collimating jaw to move across the field to produce a predefined wedged dose distribution. Measured dose profiles were compared with plans calculated by a treatment planning system for various fields. EDW fields were examined for various wedge angles currently available for clinical use. EDW fields for non-clinical angles, which are not currently available, were also produced by applying the ratio of tangents method and delivered with the use of the Dynamic Beam Delivery (DBD) utility. The measured dose profiles correspond to the generated treatment plans within acceptable tolerance limits. Wedge factors were measured for EDW angles (clinical and non-clinical) for asymmetric fields. The production of the non-clinical angles serves as a validation of the current methodology used to generate wedge profiles, and extends the capabilities ofthe current EDW system. Lastly, a comprehensive set of quality assurance tests for the EDW were developed and are presented in this thesis.
| Identifer | oai:union.ndltd.org:LACETR/oai:collectionscanada.gc.ca:QMM.19431 |
| Date | January 2003 |
| Creators | Yuen, Conrad F. |
| Publisher | McGill University |
| Source Sets | Library and Archives Canada ETDs Repository / Centre d'archives des thèses électroniques de Bibliothèque et Archives Canada |
| Language | English |
| 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: 002010135, Theses scanned by McGill Library. |
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