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Dynamic anthropomor...
Dynamic anthropomorphic thorax phantom for quality assurance of motion management in radiotherapy
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- Abdollahi, Sara (author)
- Ferdowsi University of Mashhad,University Hospital of Zurich
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- Mowlavi, Ali Asghar (author)
- University of Montreal
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- Yazdi, Mohammad Hadi Hadizadeh (author)
- Ferdowsi University of Mashhad
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- Ceberg, Sofie (author)
- Lund University,Lunds universitet,Medicinsk strålningsfysik, Lund,Sektion V,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Radiotherapy Physics,Forskargrupper vid Lunds universitet,LUCC: Lunds universitets cancercentrum,Övriga starka forskningsmiljöer,Medical Radiation Physics, Lund,Section V,Department of Clinical Sciences, Lund,Faculty of Medicine,Lund University Research Groups,LUCC: Lund University Cancer Centre,Other Strong Research Environments
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- Aznar, Marianne Camille (author)
- University of Manchester
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Tabrizi, Fatemeh Varshoee (author)
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- Salek, Roham (author)
- Mashhad University of Medical Sciences
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- Guckenberger, Matthias (author)
- University Hospital of Zurich
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- Tanadini-Lang, Stephanie (author)
- University Hospital of Zurich
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(creator_code:org_t)
- 2024
- 2024
- English.
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In: Physics and imaging in radiation oncology. - 2405-6316. ; 30
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http://dx.doi.org/10... (free)
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
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- Background and purpose: Motion management techniques are important to spare the healthy tissue adequately. However, they are complex and need dedicated quality assurance. The aim of this study was to create a dynamic phantom designed for quality assurance and to replicate a patient's size, anatomy, and tissue density. Materials and methods: A computed tomography (CT) scan of a cancer patient was used to create molds for the lungs, heart, ribs, and vertebral column via additive manufacturing. A pump system and software were developed to simulate respiratory dynamics. The extent of respiratory motion was quantified using a 4DCT scan. End-to-end tests were conducted to evaluate two motion management techniques for lung stereotactic body radiotherapy (SBRT). Results: The chest wall moved between 4 mm and 13 mm anteriorly and 2 mm to 7 mm laterally during the breathing. The diaphragm exhibited superior-inferior movement ranging from 5 mm to 16 mm in the left lung and 10 mm to 36 mm in the right lung. The left lung tumor displaced ± 7 mm superior-inferiorly and anterior-posteriorly. The CT numbers were for lung: −716 ± 108 HU (phantom) and −713 ± 70 HU (patient); bone: 460 ± 20 HU (phantom) and 458 ± 206 HU (patient); soft tissue: 92 ± 9 HU (phantom) and 60 ± 25 HU (patient). The end-to-end testing showed an excellent agreement between the measured and the calculated dose for ion chamber and film dosimetry. Conclusions: The phantom is recommended for quality assurance, evaluating the institution's specific planning and motion management strategies either through end-to-end testing or as an external audit phantom.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Radiologi och bildbehandling (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Radiology, Nuclear Medicine and Medical Imaging (hsv//eng)
Keyword
- Dynamic anthropomorphic phantom
- End-to-end test
- Lung SBRT
Publication and Content Type
- art (subject category)
- ref (subject category)
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