Suitability Assessment of an Indigenous Heterogeneous Thoracic Phantom for Patient-Specific Quality Assurance in Radiotherapy
Introduction: Patient-specific quality assurance (PSQA) assumes a vital role in precise and accurate radiation delivery to cancer patients. Since the patient body comprises heterogeneous media, the present study aimed to fabricate a heterogeneous thoracic phantom for PSQA.Material and Methods: Heter...
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| Format: | Article |
| Language: | English |
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Mashhad University of Medical Sciences
2022-03-01
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| Series: | Iranian Journal of Medical Physics |
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| Online Access: | https://ijmp.mums.ac.ir/article_18359_cdbec76c88e20aa6a007039af7e9f2ad.pdf |
| _version_ | 1797209662668406784 |
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| author | Vinod Gangwar Avinash Agarwal Om Prakash Gurjar Lalit Kumar Vineet Kumar Mishra Surendra Mishra |
| author_facet | Vinod Gangwar Avinash Agarwal Om Prakash Gurjar Lalit Kumar Vineet Kumar Mishra Surendra Mishra |
| author_sort | Vinod Gangwar |
| collection | DOAJ |
| description | Introduction: Patient-specific quality assurance (PSQA) assumes a vital role in precise and accurate radiation delivery to cancer patients. Since the patient body comprises heterogeneous media, the present study aimed to fabricate a heterogeneous thoracic phantom for PSQA.Material and Methods: Heterogeneous thoracic (HT) phantom was fabricated using rib cage madeup of bone equivalent material, kailwood to mimic lungs and wax to mimic various body parts. Physical density of all these materials used in phantom fabrication was measured and compared with that of the corresponding part of actual human thorax. One beam was planned on the computed tomography (CT) images of phantom and actual patient thorax region. Dose distribution in both the plans was measured and analyzed.Results:The estimated densities of heart, lung, ribs, scapula, spine, and chest wall tissues were 0.804±0.007, 0.186±0.010, 1.796±0.061, 2.017±0.026, 2.106±0.029 and 0.739±0.028 respectively in case of HT phantom while 1.038±0.010, 0.199±0.031, 1.715±0.040, 2.006±0.019, 1.929±0.065 and 0.816±0.028 g/cc, respectively in case of actual human thorax region.The depths of isodose curves in HT phantom were also comparable to the isodose curve’s depths inreal patient. PSQA results were within ±3% for flat beam (FB) and flattening filtered free beam (FFFB) of 6 megavolts (MV) energy.Conclusion: Density and dose distribution pattern in HT phantom were similar to that in actual human thorax region. Thus, fabricated HT phantom can be utilized for radiation dosimetry in thoracic cancer patients. The materials used to develop HT phantom are easily available in market at an affordable price and easy to craft. |
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| institution | Directory Open Access Journal |
| issn | 2345-3672 |
| language | English |
| last_indexed | 2024-04-24T09:58:16Z |
| publishDate | 2022-03-01 |
| publisher | Mashhad University of Medical Sciences |
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| series | Iranian Journal of Medical Physics |
| spelling | doaj.art-fc267150bf9e4195a4ae48d94cfac5f12024-04-14T06:28:29ZengMashhad University of Medical SciencesIranian Journal of Medical Physics2345-36722022-03-01192859010.22038/ijmp.2021.52426.186218359Suitability Assessment of an Indigenous Heterogeneous Thoracic Phantom for Patient-Specific Quality Assurance in RadiotherapyVinod Gangwar0Avinash Agarwal1Om Prakash Gurjar2Lalit Kumar3Vineet Kumar Mishra4Surendra Mishra5Department of Physics Bareilly College Bareilly, Uttar Pradesh Medical Physics Division & Radiation Oncology Department, Apollo Medics Hospital, LucknowDepartment of Physics Bareilly College Bareilly, Uttar PradeshGovernment Cancer Hospital, Mahatma Gandhi Memorial Medical College, IndoreDepartment of Medical Physics, Rajiv Gandhi Cancer Institute and Research Center, New DelhiMedical Physics Division & Radiation Oncology Department, Apollo Medics Hospital, LucknowDepartment of Radiation Oncology, Dr. Ram Manohar Lohia Institute of Medical sciences, Lucknow, IndiaIntroduction: Patient-specific quality assurance (PSQA) assumes a vital role in precise and accurate radiation delivery to cancer patients. Since the patient body comprises heterogeneous media, the present study aimed to fabricate a heterogeneous thoracic phantom for PSQA.Material and Methods: Heterogeneous thoracic (HT) phantom was fabricated using rib cage madeup of bone equivalent material, kailwood to mimic lungs and wax to mimic various body parts. Physical density of all these materials used in phantom fabrication was measured and compared with that of the corresponding part of actual human thorax. One beam was planned on the computed tomography (CT) images of phantom and actual patient thorax region. Dose distribution in both the plans was measured and analyzed.Results:The estimated densities of heart, lung, ribs, scapula, spine, and chest wall tissues were 0.804±0.007, 0.186±0.010, 1.796±0.061, 2.017±0.026, 2.106±0.029 and 0.739±0.028 respectively in case of HT phantom while 1.038±0.010, 0.199±0.031, 1.715±0.040, 2.006±0.019, 1.929±0.065 and 0.816±0.028 g/cc, respectively in case of actual human thorax region.The depths of isodose curves in HT phantom were also comparable to the isodose curve’s depths inreal patient. PSQA results were within ±3% for flat beam (FB) and flattening filtered free beam (FFFB) of 6 megavolts (MV) energy.Conclusion: Density and dose distribution pattern in HT phantom were similar to that in actual human thorax region. Thus, fabricated HT phantom can be utilized for radiation dosimetry in thoracic cancer patients. The materials used to develop HT phantom are easily available in market at an affordable price and easy to craft.https://ijmp.mums.ac.ir/article_18359_cdbec76c88e20aa6a007039af7e9f2ad.pdfalgorithmheterogeneous phantomquality assurance |
| spellingShingle | Vinod Gangwar Avinash Agarwal Om Prakash Gurjar Lalit Kumar Vineet Kumar Mishra Surendra Mishra Suitability Assessment of an Indigenous Heterogeneous Thoracic Phantom for Patient-Specific Quality Assurance in Radiotherapy Iranian Journal of Medical Physics algorithm heterogeneous phantom quality assurance |
| title | Suitability Assessment of an Indigenous Heterogeneous Thoracic Phantom for Patient-Specific Quality Assurance in Radiotherapy |
| title_full | Suitability Assessment of an Indigenous Heterogeneous Thoracic Phantom for Patient-Specific Quality Assurance in Radiotherapy |
| title_fullStr | Suitability Assessment of an Indigenous Heterogeneous Thoracic Phantom for Patient-Specific Quality Assurance in Radiotherapy |
| title_full_unstemmed | Suitability Assessment of an Indigenous Heterogeneous Thoracic Phantom for Patient-Specific Quality Assurance in Radiotherapy |
| title_short | Suitability Assessment of an Indigenous Heterogeneous Thoracic Phantom for Patient-Specific Quality Assurance in Radiotherapy |
| title_sort | suitability assessment of an indigenous heterogeneous thoracic phantom for patient specific quality assurance in radiotherapy |
| topic | algorithm heterogeneous phantom quality assurance |
| url | https://ijmp.mums.ac.ir/article_18359_cdbec76c88e20aa6a007039af7e9f2ad.pdf |
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