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postgraduate thesis: Shielding for patient-scattered radiation from elekta precise linear accelerator by Monte Carlo simulation

TitleShielding for patient-scattered radiation from elekta precise linear accelerator by Monte Carlo simulation
Authors
Issue Date2014
PublisherThe University of Hong Kong (Pokfulam, Hong Kong)
Citation
Cheung, C. [張志偉]. (2014). Shielding for patient-scattered radiation from elekta precise linear accelerator by Monte Carlo simulation. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5303880
AbstractIn shielding design of a radiotherapy treatment room, the requirements of dose limits outside the room must be fulfilled. The primary beam from the linear accelerator, the leakage radiation from the gantry and the scattered radiation from the patient and other objects contribute to the radiation exposure outside the room. In this dissertation, we focused on the scattered radiation from the patient irradiated by the primary radiation beam including 6, 10 and 25 MV from an Elekta Precise linear accelerator. By using Monte Carlo simulations, we analysed the characteristics of the scattered radiation, so that we have better understanding of the scattered radiation when designing the shielding of a treatment room. The angular distributions and energy spectrum of the scattered radiation are presented. It was found that both the number of scatter particles and energy of the scatter particles increase with increasing primary beam energy and decreasing scatter angle. We also performed Monte Carlo simulations to collect the transmission data of scattered particles passing through the shielding wall made of the concrete commonly used in Hong Kong. The simulated results are tabulated and could be used for radiation protection purposes for the estimation of the radiation exposure behind the shielding concrete wall due to the patient scattered radiation.
DegreeMaster of Medical Sciences
Dept/ProgramMedical Sciences
Persistent Identifierhttp://hdl.handle.net/10722/206509

 

DC FieldValueLanguage
dc.contributor.authorCheung, Chi-wai-
dc.contributor.author張志偉-
dc.date.accessioned2014-11-03T23:14:51Z-
dc.date.available2014-11-03T23:14:51Z-
dc.date.issued2014-
dc.identifier.citationCheung, C. [張志偉]. (2014). Shielding for patient-scattered radiation from elekta precise linear accelerator by Monte Carlo simulation. (Thesis). University of Hong Kong, Pokfulam, Hong Kong SAR. Retrieved from http://dx.doi.org/10.5353/th_b5303880-
dc.identifier.urihttp://hdl.handle.net/10722/206509-
dc.description.abstractIn shielding design of a radiotherapy treatment room, the requirements of dose limits outside the room must be fulfilled. The primary beam from the linear accelerator, the leakage radiation from the gantry and the scattered radiation from the patient and other objects contribute to the radiation exposure outside the room. In this dissertation, we focused on the scattered radiation from the patient irradiated by the primary radiation beam including 6, 10 and 25 MV from an Elekta Precise linear accelerator. By using Monte Carlo simulations, we analysed the characteristics of the scattered radiation, so that we have better understanding of the scattered radiation when designing the shielding of a treatment room. The angular distributions and energy spectrum of the scattered radiation are presented. It was found that both the number of scatter particles and energy of the scatter particles increase with increasing primary beam energy and decreasing scatter angle. We also performed Monte Carlo simulations to collect the transmission data of scattered particles passing through the shielding wall made of the concrete commonly used in Hong Kong. The simulated results are tabulated and could be used for radiation protection purposes for the estimation of the radiation exposure behind the shielding concrete wall due to the patient scattered radiation.-
dc.languageeng-
dc.publisherThe University of Hong Kong (Pokfulam, Hong Kong)-
dc.relation.ispartofHKU Theses Online (HKUTO)-
dc.rightsThe author retains all proprietary rights, (such as patent rights) and the right to use in future works.-
dc.rightsCreative Commons: Attribution 3.0 Hong Kong License-
dc.titleShielding for patient-scattered radiation from elekta precise linear accelerator by Monte Carlo simulation-
dc.typePG_Thesis-
dc.identifier.hkulb5303880-
dc.description.thesisnameMaster of Medical Sciences-
dc.description.thesislevelMaster-
dc.description.thesisdisciplineMedical Sciences-
dc.description.naturepublished_or_final_version-
dc.identifier.doi10.5353/th_b5303880-

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