Characterization of Gafchromic HD-V2 Film for dose verification in stereotactic radiosurgery (SRS) / Muhammad Taufiq Azman
The purpose of this study was to characterize specific dosimetric properties of Gafchromic HD-V2 film and to investigate its feasibility in the dosimetric verification for Stereotactic Radiosurgery (SRS). Basic dosimeter properties including energy and dose rate dependencies were investigated and...
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2018
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| Online Access: | http://studentsrepo.um.edu.my/11570/4/taufiq.pdf http://studentsrepo.um.edu.my/11570/ |
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| _version_ | 1831435844076961792 |
|---|---|
| author | Muhammad Taufiq, Azman |
| author_facet | Muhammad Taufiq, Azman |
| author_sort | Muhammad Taufiq, Azman |
| building | UM Library |
| collection | Institutional Repository |
| content_provider | Universiti Malaya |
| content_source | UM Student Repository |
| continent | Asia |
| country | Malaysia |
| description | The purpose of this study was to characterize specific dosimetric properties of
Gafchromic HD-V2 film and to investigate its feasibility in the dosimetric verification for
Stereotactic Radiosurgery (SRS). Basic dosimeter properties including energy and dose
rate dependencies were investigated and HD-V2 film showed energy and dose rate
dependencies of less than 9.5% and 4.94% respectively. The HD-V2 film has very low
dependency on scanning orientation in portrait versus landscape as well as “face-up”
versus “face-down” scanning orientation. The percentage differences recorded were less
than 2.7% for portrait versus landscape and less than 2.5% for “face-up” versus “facedown” orientation. In terms of angular dependency, there was no significant influence on
net optical density, with deviations less than 4.3% for films irradiated at selected gantry
angles ranging from 0° (which film is perpendicular to the irradiation beam) to 180°. Two
treatment plans using SRS technique were created and irradiated using HD-V2 film for
dosimetric verification. The dose distributions were calculated using a treatment planning
system to obtain point doses at specified positions within a phantom. The calculated doses
from TPS were compared to dose distributions delivered to HD-V2 film. The results of
the point dose measurements for SRS treatment irradiations showed that the deviations
between the TPS predicted dose and HD-V2 film measurements were less 4% which were
within the recommended values by ICRU. This study shows that Gafchromic HD-V2 film
can be used as dosimetric verification for SRS and for radiotherapy clinical practices that
involves high range of doses of 10 to 1000 Gy |
| format | Thesis |
| id | my.um.stud-11570 |
| institution | Universiti Malaya |
| publishDate | 2018 |
| record_format | eprints |
| spelling | my.um.stud-115702020-08-25T18:57:57Z Characterization of Gafchromic HD-V2 Film for dose verification in stereotactic radiosurgery (SRS) / Muhammad Taufiq Azman Muhammad Taufiq, Azman R Medicine (General) The purpose of this study was to characterize specific dosimetric properties of Gafchromic HD-V2 film and to investigate its feasibility in the dosimetric verification for Stereotactic Radiosurgery (SRS). Basic dosimeter properties including energy and dose rate dependencies were investigated and HD-V2 film showed energy and dose rate dependencies of less than 9.5% and 4.94% respectively. The HD-V2 film has very low dependency on scanning orientation in portrait versus landscape as well as “face-up” versus “face-down” scanning orientation. The percentage differences recorded were less than 2.7% for portrait versus landscape and less than 2.5% for “face-up” versus “facedown” orientation. In terms of angular dependency, there was no significant influence on net optical density, with deviations less than 4.3% for films irradiated at selected gantry angles ranging from 0° (which film is perpendicular to the irradiation beam) to 180°. Two treatment plans using SRS technique were created and irradiated using HD-V2 film for dosimetric verification. The dose distributions were calculated using a treatment planning system to obtain point doses at specified positions within a phantom. The calculated doses from TPS were compared to dose distributions delivered to HD-V2 film. The results of the point dose measurements for SRS treatment irradiations showed that the deviations between the TPS predicted dose and HD-V2 film measurements were less 4% which were within the recommended values by ICRU. This study shows that Gafchromic HD-V2 film can be used as dosimetric verification for SRS and for radiotherapy clinical practices that involves high range of doses of 10 to 1000 Gy 2018 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/11570/4/taufiq.pdf Muhammad Taufiq, Azman (2018) Characterization of Gafchromic HD-V2 Film for dose verification in stereotactic radiosurgery (SRS) / Muhammad Taufiq Azman. Masters thesis, University of Malaya. http://studentsrepo.um.edu.my/11570/ |
| spellingShingle | R Medicine (General) Muhammad Taufiq, Azman Characterization of Gafchromic HD-V2 Film for dose verification in stereotactic radiosurgery (SRS) / Muhammad Taufiq Azman |
| title | Characterization of Gafchromic HD-V2 Film for dose verification in stereotactic radiosurgery (SRS) / Muhammad Taufiq Azman |
| title_full | Characterization of Gafchromic HD-V2 Film for dose verification in stereotactic radiosurgery (SRS) / Muhammad Taufiq Azman |
| title_fullStr | Characterization of Gafchromic HD-V2 Film for dose verification in stereotactic radiosurgery (SRS) / Muhammad Taufiq Azman |
| title_full_unstemmed | Characterization of Gafchromic HD-V2 Film for dose verification in stereotactic radiosurgery (SRS) / Muhammad Taufiq Azman |
| title_short | Characterization of Gafchromic HD-V2 Film for dose verification in stereotactic radiosurgery (SRS) / Muhammad Taufiq Azman |
| title_sort | characterization of gafchromic hd-v2 film for dose verification in stereotactic radiosurgery (srs) / muhammad taufiq azman |
| topic | R Medicine (General) |
| url | http://studentsrepo.um.edu.my/11570/4/taufiq.pdf http://studentsrepo.um.edu.my/11570/ |
| url_provider | http://studentsrepo.um.edu.my/ |