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Full-Text Articles in Physical Sciences and Mathematics
Multileaf Collimator Positional Reproducibility Evaluated With A Two-Dimensional Diode Array, Kara King Ferachi
Multileaf Collimator Positional Reproducibility Evaluated With A Two-Dimensional Diode Array, Kara King Ferachi
LSU Master's Theses
When delivering the total dose via a sequence of small fields shaped by a multileaf collimator, it is important to consider leaf positional reproducibility. A small error in the leaf position can result in large dose errors to the entire field. This is true for both dynamic multileaf collimation and step and shoot delivery. The goal of this research project is to design a method of quality assurance that is easily reproducible, sensitive to small changes in leaf position, and requires minimal time on the part of the medical physicist to carry out. This paper describes a system of measurements …
Evaluation Of The Profiler As A Tool For Imrt Qa, Manuel Rodriguez
Evaluation Of The Profiler As A Tool For Imrt Qa, Manuel Rodriguez
LSU Master's Theses
The principal goal in this project is to determine if a one-dimensional diode array, the Profiler (Sun Nuclear Corporation), can be used as a tool for intensity modulated radiation therapy quality assurance (QA). A one-dimensional diode array can be used to measure dose and dose profiles for IMRT fields. IMRT fields for real cases at Mary Bird Perkins Cancer Center were used to test the Profiler model 1170 (Sun Nuclear Corporation). The main concern with the Profiler is that there is not central diode in the array. The absorbed dose displayed in the Profiler window is the average of the …