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Chuang HD, Lin YH, Lin CH, Lai YC, Wu CH, Hsu SM. Radiation Safety Assessment in Prostate Cancer Treatment: A Predictive Approach for I-125 Brachytherapy. Cancers (Basel) 2024; 16:1790. [PMID: 38791869 PMCID: PMC11120066 DOI: 10.3390/cancers16101790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 05/05/2024] [Accepted: 05/06/2024] [Indexed: 05/26/2024] Open
Abstract
This study uses Monte Carlo simulation and experimental measurements to develop a predictive model for estimating the external dose rate associated with permanent radioactive source implantation in prostate cancer patients. The objective is to estimate the accuracy of the patient's external dose rate measurement. First, I-125 radioactive sources were implanted into Mylar window water phantoms to simulate the permanent implantation of these sources in patients. Water phantom experimental measurement was combined with Monte Carlo simulation to develop predictive equations, whose performance was verified against external clinical data. The model's accuracy in predicting the external dose rate in patients with permanently implanted I-125 radioactive sources was high (R2 = 0.999). A comparative analysis of the experimental measurements and the Monte Carlo simulations revealed that the maximum discrepancy between the measured and calculated values for the water phantom was less than 5.00%. The model is practical for radiation safety assessments, enabling the evaluation of radiation exposure risks to individuals around patients with permanently implanted I-125 radioactive sources.
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Affiliation(s)
- Ho-Da Chuang
- Medical Physics and Radiation Measurements Laboratory, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan; (H.-D.C.); (C.-H.L.)
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan
- Department of Medical Physics, Koo Foundation Sun Yat-sen Cancer Center, Taipei 11259, Taiwan
| | - Yu-Hung Lin
- Department of Urology, Koo Foundation Sun Yat-sen Cancer Center, Taipei 11259, Taiwan;
| | - Chin-Hsiung Lin
- Medical Physics and Radiation Measurements Laboratory, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan; (H.-D.C.); (C.-H.L.)
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan
- Department of Medical Physics, Koo Foundation Sun Yat-sen Cancer Center, Taipei 11259, Taiwan
| | - Yuan-Chun Lai
- Department of Radiation Oncology, Changhua Christian Hospital, Changhua 50006, Taiwan;
- Department of Medical Imaging and Radiological Sciences, Central Taiwan University of Science and Technology, Taichung 40601, Taiwan
| | - Chin-Hui Wu
- Department of Medical Imaging and Radiological Sciences, Tzu-Chi University of Science and Technology, Hualien 97005, Taiwan
| | - Shih-Ming Hsu
- Medical Physics and Radiation Measurements Laboratory, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan; (H.-D.C.); (C.-H.L.)
- Department of Biomedical Imaging and Radiological Sciences, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan
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Neutron conversion coefficients of ambient dose equivalent and personal dose equivalent. POLISH JOURNAL OF MEDICAL PHYSICS AND ENGINEERING 2022. [DOI: 10.2478/pjmpe-2022-0006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Abstract
Introduction: This work aims to calculate the ambient and personal dose equivalent conversion coefficients.
Material and methods: The conversion coefficients have been calculated using MC simulation. Additionally, this paper proposes a new method that depends on an analytical approach.
Results: The obtained results in good agreement between MC and an analytical approach were observed. The obtained results were compared to those published in ICRU 57 report.
Conclusions: We deduced that the analytical approach is as effective and suitable as the MC simulation to calculate the operational quantity conversion coefficients.
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