Rat trachea dose distribution model using MCNPTM /
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| Other Authors: | |
| Format: | Thesis eBook |
| Language: | English |
| Published: |
[College Station, Tex.] :
[Texas A&M University],
[2010]
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| Subjects: | |
| Online Access: | Link to OAK Trust copy |
| Abstract: | The effects of high levels of radiation are frequently studied, but the effects of very low dose irradiation are still unknown even in todays technology-driven world. A study recently carried out at Texas A&M University attempts to bridge that gap by studying the effects of low-dose x rays on rat tracheas maintained ex vivo. While this study focused on the biological effects of this radiation at the level of gene expression, the microscopic dose distribution received by the trachea during this experiment was ill defined. Therefore, a computer model was developed to estimate this dose distribution. The Monte Carlo N-Particle (MCNPTM) code was used to construct a model of the experiment and to calculate the dose deposited within the trachea based on two billion histories. The code yielded a dose of 15.7 Gy with the tungsten target at a 22° angle with the copper exit window, and 15.6 Gy with the tungsten target at a 45° angle with the copper exit window. Both calculations had approximately 0.016 photons/source particle exiting the lower portion of the copper exit window. Furthermore, the flux averaged over the trachea was found to be approximately 6 E-08 particle/cm2 for both the 22° and 45° angle. With these values, it was concluded that the angle of tungsten iv target with the exit window was negligible, yielding very little difference in the dose deposited within the rat trachea. |
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| Item Description: | "Major Subject: Health Physics" Title from author supplied metadata (automated record created 2010-03-12 12:08:51). Electronic resource. |
| Physical Description: | 1 online resource. |
| Bibliography: | Includes bibliographical references. |