This study investigates the Monte Carlo calculations of cell survival in metastatic subcutaneous melanoma cancer tumours. To achieve this goal, a Monte Carlo program called SLAB.FOR was developed by Prof. David Charlton. The program randomly places alphas from 213Bi in the medium, which is a cancer cell sized micro dosimeter with a SiO2 converter on the top and Si as the sensitive volume. Then the Monte Carlo program calculates the energy deposited by alphas and their chord length and also the dose deposited in the sensitive volume. To be able to use this program, some information was taken from phase one of a clinical trial conducted by the Centre of Experimental Radiation Oncology (CERO) in 2001. During the course of this study the administered activities on tumours with different diameters are determined. Using this information the number of alpha particles going through each m3 of the tumour was found. Based on this number, the program SLAB.FOR was run for different administered activities in the tumours. The output of the program yielded the energy deposited and the number of hits by the alpha particles as they go through the tumours. The output data was also used to calculate the cell survival values, energy and hit distribution probabilities. The cell survival values were then used to plot the cell survival curves. They were plotted against dose, number of hits and injected activity per volume of the tumours. These data were also used to plot the energy and hit distribution probability curves. Our results show that survival is dependent on the diameter of the cell and decreases when the dose deposited in the tumour increases. The survival also has a relationship with the number of hits that a cell receives and it also depends on the injected activity to the volume. The survival decreases as the number of hits and injected activity increases. Our results confirmed what was stated in the clinical trial conducted by the Centre of Experimental Radiation Oncology (CERO) in 2001.
| Identifer | oai:union.ndltd.org:ADTP/187061 |
| Date | January 2006 |
| Creators | Pashaeinejad, Masoumeh, Physics, Faculty of Science, UNSW |
| Publisher | Awarded by:University of New South Wales. Physics |
| Source Sets | Australiasian Digital Theses Program |
| Language | English |
| Detected Language | English |
| Rights | Copyright Masoumeh Pashaeinejad, http://unsworks.unsw.edu.au/copyright |
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