Implementation of the Dosimetry Check Software Package in Computing 3D Patient Exit Dose Through Generation of a Deconvolution Kernel to be Used for Patients’ IMRT Treatment Plan QA
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| Language: | English |
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University of Toledo Health Science Campus / OhioLINK
2010
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| Online Access: | http://rave.ohiolink.edu/etdc/view?acc_num=mco1290456365 |
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ndltd-OhioLink-oai-etd.ohiolink.edu-mco12904563652021-08-03T05:38:54Z Implementation of the Dosimetry Check Software Package in Computing 3D Patient Exit Dose Through Generation of a Deconvolution Kernel to be Used for Patients’ IMRT Treatment Plan QA Bismack, Brian James Physics Radiation exit image transit image 3D dose reconstruction IMRT patient QA Using the Dosimetry Check IMRT QA package a deconvolution kernel to be used in exit image dose calculations was created. This kernel modeled Electronic Portal Imaging Device response by incorporating the various machine characteristics along with the variant patient thickness and composition. To properly achieve this, Dosimetry Check first had to accurately model the beams for the machines being used. This was done by taking a series of in air and in water measurements including central axis depth dose values at various field sizes and in-air off center ratios to model beam flatness and symmetry. A deconvolution kernel for patient CT dose computation using pre-treatment (in-air) EPID images was created. This baseline helped establish the necessary measurements for the exit image kernel. The necessary measurements for the exit image kernel included EPID images of various field sizes with various thicknesses of water in the beam as well as a characterization of off axis narrow beam transmission. The fit was performed and a report generated for its variance. The kernel was then successfully used in the evaluation of an IMRT prostate plan that was created for an anthropomorphic phantom and compared to a baseline evaluation of the same plan using in air EPID images. Volumetric, planar, and point dose comparison between measured and computed dose distributions agreed favorably indicating the validity of technique used for IMRT QA. 2010-12-28 English text University of Toledo Health Science Campus / OhioLINK http://rave.ohiolink.edu/etdc/view?acc_num=mco1290456365 http://rave.ohiolink.edu/etdc/view?acc_num=mco1290456365 unrestricted This thesis or dissertation is protected by copyright: all rights reserved. It may not be copied or redistributed beyond the terms of applicable copyright laws. |
| collection |
NDLTD |
| language |
English |
| sources |
NDLTD |
| topic |
Physics Radiation exit image transit image 3D dose reconstruction IMRT patient QA |
| spellingShingle |
Physics Radiation exit image transit image 3D dose reconstruction IMRT patient QA Bismack, Brian James Implementation of the Dosimetry Check Software Package in Computing 3D Patient Exit Dose Through Generation of a Deconvolution Kernel to be Used for Patients’ IMRT Treatment Plan QA |
| author |
Bismack, Brian James |
| author_facet |
Bismack, Brian James |
| author_sort |
Bismack, Brian James |
| title |
Implementation of the Dosimetry Check Software Package in Computing 3D Patient Exit Dose Through Generation of a Deconvolution Kernel to be Used for Patients’ IMRT Treatment Plan QA |
| title_short |
Implementation of the Dosimetry Check Software Package in Computing 3D Patient Exit Dose Through Generation of a Deconvolution Kernel to be Used for Patients’ IMRT Treatment Plan QA |
| title_full |
Implementation of the Dosimetry Check Software Package in Computing 3D Patient Exit Dose Through Generation of a Deconvolution Kernel to be Used for Patients’ IMRT Treatment Plan QA |
| title_fullStr |
Implementation of the Dosimetry Check Software Package in Computing 3D Patient Exit Dose Through Generation of a Deconvolution Kernel to be Used for Patients’ IMRT Treatment Plan QA |
| title_full_unstemmed |
Implementation of the Dosimetry Check Software Package in Computing 3D Patient Exit Dose Through Generation of a Deconvolution Kernel to be Used for Patients’ IMRT Treatment Plan QA |
| title_sort |
implementation of the dosimetry check software package in computing 3d patient exit dose through generation of a deconvolution kernel to be used for patients’ imrt treatment plan qa |
| publisher |
University of Toledo Health Science Campus / OhioLINK |
| publishDate |
2010 |
| url |
http://rave.ohiolink.edu/etdc/view?acc_num=mco1290456365 |
| work_keys_str_mv |
AT bismackbrianjames implementationofthedosimetrychecksoftwarepackageincomputing3dpatientexitdosethroughgenerationofadeconvolutionkerneltobeusedforpatientsimrttreatmentplanqa |
| _version_ |
1719422993305698304 |