Independent tps dose verification for photon beam shaped with multileaf collimator: evidence from single-institution study
This study was conducted to initiate the IAEA's fourth sequential of remote dosimetry auditing steps, which involves the treatment planning system (TPS) dose verification for photon beams shaped with multileaf collimators (MLC). A dosimetry package containing plastic capsules, a TLD holder, an...
| Main Authors: | , , , , , , , |
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| Format: | Article |
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Elsevier BV
2023
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| Online Access: | http://psasir.upm.edu.my/id/eprint/110541/ |
| _version_ | 1848865543773224960 |
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| author | Ab Rahim, Rohaizah Mohamad Ahmad Fadzil, Muhammad Safwan Azmi, Nor Aniza Sabarudin, Akmal Mohd Saparudin, Abdul Khaliq Dollah, Mohd Taufik Min, Ung Ngie Mohd Noor, Noramaliza |
| author_facet | Ab Rahim, Rohaizah Mohamad Ahmad Fadzil, Muhammad Safwan Azmi, Nor Aniza Sabarudin, Akmal Mohd Saparudin, Abdul Khaliq Dollah, Mohd Taufik Min, Ung Ngie Mohd Noor, Noramaliza |
| author_sort | Ab Rahim, Rohaizah Mohamad |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | This study was conducted to initiate the IAEA's fourth sequential of remote dosimetry auditing steps, which involves the treatment planning system (TPS) dose verification for photon beams shaped with multileaf collimators (MLC). A dosimetry package containing plastic capsules, a TLD holder, an instruction booklet, and datasheets were mailed to the radiotherapy center. Plastic capsules filled with TLD-100 were prepared for irradiation to check the dose variation with field size and shape for a range of MLC-shaped regular and irregular fields, including wedged fields. Each capsule was irradiated to 2 Gy of absorbed dose utilizing 6 MV and 10 MV beams. The dose calculated by the TPS (DTPS) was compared to the dose measured by the ionization chamber (DIC) and TLD-100 (DTLD). RESULTS All 14 measurements point within ±5 of the TPS dose. For 6 MV and 10 MV beams, the percentage deviation between DTPS to DIC and DTLD was between 0.10 to 3.75 and 0.05 to 4.40, respectively. The mean ratio of DIC/DTPS exposed to 6 MV and 10 MV beams was 1.003 ± 0.004 and 1.007 ± 0.014, respectively, whereas the mean ratio of DTLD/DTPS was 1.032± 0.006 and 1.029 ± 0.016 for 6 MV and 10 MV beams. The dose verification for TPS was successfully commenced to check dosimetric data related to a radiotherapy treatment unit equipped with MLC. The recommendation was to extend the postal dosimetry audit to the national scale to improve treatment accuracy. |
| first_indexed | 2025-11-15T14:06:23Z |
| format | Article |
| id | upm-110541 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-15T14:06:23Z |
| publishDate | 2023 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-1105412024-05-27T03:06:39Z http://psasir.upm.edu.my/id/eprint/110541/ Independent tps dose verification for photon beam shaped with multileaf collimator: evidence from single-institution study Ab Rahim, Rohaizah Mohamad Ahmad Fadzil, Muhammad Safwan Azmi, Nor Aniza Sabarudin, Akmal Mohd Saparudin, Abdul Khaliq Dollah, Mohd Taufik Min, Ung Ngie Mohd Noor, Noramaliza This study was conducted to initiate the IAEA's fourth sequential of remote dosimetry auditing steps, which involves the treatment planning system (TPS) dose verification for photon beams shaped with multileaf collimators (MLC). A dosimetry package containing plastic capsules, a TLD holder, an instruction booklet, and datasheets were mailed to the radiotherapy center. Plastic capsules filled with TLD-100 were prepared for irradiation to check the dose variation with field size and shape for a range of MLC-shaped regular and irregular fields, including wedged fields. Each capsule was irradiated to 2 Gy of absorbed dose utilizing 6 MV and 10 MV beams. The dose calculated by the TPS (DTPS) was compared to the dose measured by the ionization chamber (DIC) and TLD-100 (DTLD). RESULTS All 14 measurements point within ±5 of the TPS dose. For 6 MV and 10 MV beams, the percentage deviation between DTPS to DIC and DTLD was between 0.10 to 3.75 and 0.05 to 4.40, respectively. The mean ratio of DIC/DTPS exposed to 6 MV and 10 MV beams was 1.003 ± 0.004 and 1.007 ± 0.014, respectively, whereas the mean ratio of DTLD/DTPS was 1.032± 0.006 and 1.029 ± 0.016 for 6 MV and 10 MV beams. The dose verification for TPS was successfully commenced to check dosimetric data related to a radiotherapy treatment unit equipped with MLC. The recommendation was to extend the postal dosimetry audit to the national scale to improve treatment accuracy. Elsevier BV 2023-09 Article PeerReviewed Ab Rahim, Rohaizah Mohamad and Ahmad Fadzil, Muhammad Safwan and Azmi, Nor Aniza and Sabarudin, Akmal and Mohd Saparudin, Abdul Khaliq and Dollah, Mohd Taufik and Min, Ung Ngie and Mohd Noor, Noramaliza (2023) Independent tps dose verification for photon beam shaped with multileaf collimator: evidence from single-institution study. JOURNAL OF MEDICAL IMAGING AND RADIATION SCIENCES, 54 (3). pp. 1-10. ISSN 1939-8654 https://linkinghub.elsevier.com/retrieve/pii/S1939865423017083 10.1016/j.jmir.2023.06.059 |
| spellingShingle | Ab Rahim, Rohaizah Mohamad Ahmad Fadzil, Muhammad Safwan Azmi, Nor Aniza Sabarudin, Akmal Mohd Saparudin, Abdul Khaliq Dollah, Mohd Taufik Min, Ung Ngie Mohd Noor, Noramaliza Independent tps dose verification for photon beam shaped with multileaf collimator: evidence from single-institution study |
| title | Independent tps dose verification for photon beam shaped with multileaf collimator: evidence from single-institution study |
| title_full | Independent tps dose verification for photon beam shaped with multileaf collimator: evidence from single-institution study |
| title_fullStr | Independent tps dose verification for photon beam shaped with multileaf collimator: evidence from single-institution study |
| title_full_unstemmed | Independent tps dose verification for photon beam shaped with multileaf collimator: evidence from single-institution study |
| title_short | Independent tps dose verification for photon beam shaped with multileaf collimator: evidence from single-institution study |
| title_sort | independent tps dose verification for photon beam shaped with multileaf collimator: evidence from single-institution study |
| url | http://psasir.upm.edu.my/id/eprint/110541/ http://psasir.upm.edu.my/id/eprint/110541/ http://psasir.upm.edu.my/id/eprint/110541/ |