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mahur, mamta, Singh, Munendra, Gurjar, Om Prakash, Semwal, Manoj Kumar. (1402). Designed and Validation of In-House Head and Neck Phantom for Quality Assurance and Radiotherapy Dose Measurements. , 20(5), 282-289. doi: 10.22038/ijmp.2022.63407.2084
mamta mahur; Munendra Singh; Om Prakash Gurjar; Manoj Kumar Semwal. "Designed and Validation of In-House Head and Neck Phantom for Quality Assurance and Radiotherapy Dose Measurements". , 20, 5, 1402, 282-289. doi: 10.22038/ijmp.2022.63407.2084
mahur, mamta, Singh, Munendra, Gurjar, Om Prakash, Semwal, Manoj Kumar. (1402). 'Designed and Validation of In-House Head and Neck Phantom for Quality Assurance and Radiotherapy Dose Measurements', , 20(5), pp. 282-289. doi: 10.22038/ijmp.2022.63407.2084
mahur, mamta, Singh, Munendra, Gurjar, Om Prakash, Semwal, Manoj Kumar. Designed and Validation of In-House Head and Neck Phantom for Quality Assurance and Radiotherapy Dose Measurements. , 1402; 20(5): 282-289. doi: 10.22038/ijmp.2022.63407.2084

Designed and Validation of In-House Head and Neck Phantom for Quality Assurance and Radiotherapy Dose Measurements

Iranian Journal of Medical Physics
دوره 20، شماره 5، آذر و دی 2023، صفحه 282-289    اصل مقاله (1.41 M)
نوع مقاله: Original Paper
شناسه دیجیتال (DOI): 10.22038/ijmp.2022.63407.2084
نویسندگان
mamta mahur* 1؛ Munendra Singh2؛ Om Prakash Gurjar3؛ Manoj Kumar Semwal4
11. Department of Radiotherapy, Delhi State Cancer Institute, Dilshad Garden, Delhi – 110095, India 2. II. Department of Physics, School of Basic Sciences & Research, Sharda University, Greater Noida, Uttar Pradesh- 201310, India
2Department of Physics, School of Basic Sciences and Research, Sharda University, Greater Noida, India
3Government Cancer Hospital, MGM Medical College, Indore
4Army Hospital (Research & Referral), Delhi Cantonment, New Delhi-110010, India
چکیده
Introduction: In radiotherapy treatment of head and neck (H&N) cancers, more complex quality assurance checks and patient-specific dosimetry are required to ensure accuracy in modern technology. In this paper, a new cost-effective human tissue equivalent H&N phantom was designed to serve as an economical and adaptable tool for assessment and assurance of precise radiotherapy dose delivery.
Material and Methods: The phantom was designed using locally available paraffin wax and tissue-equivalent materials. Computed tomography (CT) images of the phantom were acquired using a conventional CT simulator and were registered with the images of a real patient having approximately similar physical dimensions. The geometric and attenuation properties of the structures in the phantom were studied and compared to the structures of the real patient. 
Results: Hounsfield unit (HU) values of different structures of the phantom were compared to the values obtained from the CT images of a real patient and were found to be in good agreement. HU values obtained for the right, and left eye, brain, larynx, and bone shell were 7(±10) HU, 6(±9), 30(±14) HU, -984(±6) HU and 873(±214) HU in phantom. Structures simulated in phantom agreed well on comparison regarding both their design and radiation properties with respect to real patient human tissues. Gamma analysis was performed for the axial dose plane at plan isocenter for both the calculated dose distribution in H&N phantom and the patient agrees for 98.79% passing rate for 3% /3mm criteria.
Conclusion: The designed phantom depicts human anatomy and meets the requirements of tissue equivalence. The result shows that phantom has proved to be a cost-effective and valuable tool for accurate verification of dose distributions in regions of clinical and dosimetric interests.
کلیدواژه‌ها
Paraffin؛ Head and Neck Cancer؛ Phantom؛ Radiotherapy and Quality Assurance
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