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Andrade EMR, Paixão L, Mendes BM, Fonseca TCF. RFPID: development and 3D-printing of a female physical phantom for whole-body counter. Biomed Phys Eng Express 2024; 10:045015. [PMID: 38697045 DOI: 10.1088/2057-1976/ad4650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2023] [Accepted: 05/02/2024] [Indexed: 05/04/2024]
Abstract
Whole-body counters (WBC) are used in internal dosimetry forin vivomonitoring in radiation protection. The calibration processes of a WBC set-up include the measurement of a physical phantom filled with a certificate radioactive source that usually is referred to a standard set of individuals determined by the International Commission on Radiological Protection (ICRP). The aim of this study was to develop an anthropomorphic and anthropometric female physical phantom for the calibration of the WBC systems. The reference female computational phantom of the ICRP, now called RFPID (Reference Female Phantom for Internal Dosimetry) was printed using PLA filament and with an empty interior. The goal is to use the RFPID to reduce the uncertainties associated within vivomonitoring system. The images which generated the phantom were manipulated using ImageJ®, Amide®, GIMP®and the 3D Slicer®software. RFPID was split into several parts and printed using a 3D printer in order to print the whole-body phantom. The newly printed physical phantom RFPID was successfully fabricated, and it is suitable to mimic human tissue, anatomically similar to a human body i.e., size, shape, material composition, and density.
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Affiliation(s)
- E M R Andrade
- Nuclear Engineering Department, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Nuclear Technology Development Center, Belo Horizonte, Minas Gerais, Brazil
| | - L Paixão
- Anatomy and Imaging Department, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - B M Mendes
- Nuclear Technology Development Center, Belo Horizonte, Minas Gerais, Brazil
| | - T C F Fonseca
- Nuclear Engineering Department, Federal University of Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Nuclear Technology Development Center, Belo Horizonte, Minas Gerais, Brazil
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2
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Ferreira CVG, Piedade JS, Prado MRD, Benavente J, Mendes BM, Paixão L, Fonseca TCF. Monte Carlo calculation of whole body counter efficiency factors for different computational phantoms. Appl Radiat Isot 2023; 194:110685. [PMID: 36758323 DOI: 10.1016/j.apradiso.2023.110685] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2022] [Revised: 12/28/2022] [Accepted: 01/15/2023] [Indexed: 02/09/2023]
Abstract
Individual monitoring can provide an estimate of the radioactivity present in the body of the exposed individuals. Periodic monitoring of occupationally exposed individuals is of great importance in case of accidental incorporation. Computational phantoms and Monte Carlo codes are often used to complement the calibration method of counting systems in internal dosimetry. Here, counting efficiency (CE) factors for a WBC system were calculated using MC simulations. The WBC system with a NaI(Tl) detector and the BOMAB phantom was modeled using three MC codes. After validation, the models were used to obtain CE values for a wide range of energies, and a CE curve was generated for the WBC system. To estimate the effects of anatomical differences on the measurement process, two anthropomorphic voxel phantoms were modeled using the VMC code. For the detector position with the highest CE value, the differences when comparing BOMAB results with the MaMP and Yale results were (-1 ± 6)% and (-1 ± 3)%, respectively. The results confirm that the use of the BOMAB phantom is a good approach for the calibration of the whole-body counter system. Measurements should be made at detector position with the highest CE values, and it is recommended to use the mean Monte Carlo CE values calculated in this work.
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Affiliation(s)
- Carlos V G Ferreira
- Universidade Federal de Minas Gerais, Escola de Engenharia - Departamento de Engenharia Nuclear, Programa de Pós-graduação em Ciências e Técnicas Nucleares, Av. Pres. Antônio Carlos 6627, Belo Horizonte MG, Brazil.
| | - Jennifer S Piedade
- Universidade Federal de Minas Gerais, Faculdade de Medicina - Departamento de Anatomia e Imagem, Av. Prof. Alfredo Balena 190, Belo Horizonte, MG, Brazil
| | - Max R D Prado
- Centro universitário de Belo Horizonte, Av. Mário Werneck 1685, Belo Horizonte MG, Brazil
| | - Jhonny Benavente
- Universidade Federal de Minas Gerais, Escola de Engenharia - Departamento de Engenharia Nuclear, Programa de Pós-graduação em Ciências e Técnicas Nucleares, Av. Pres. Antônio Carlos 6627, Belo Horizonte MG, Brazil
| | - Bruno M Mendes
- Centro de Desenvolvimento da Tecnologia Nuclear - CDTN/CNEN, Av. Pres. Antônio Carlos 6627, Belo Horizonte MG, Brazil
| | - Lucas Paixão
- Universidade Federal de Minas Gerais, Faculdade de Medicina - Departamento de Anatomia e Imagem, Av. Prof. Alfredo Balena 190, Belo Horizonte, MG, Brazil
| | - Telma C F Fonseca
- Universidade Federal de Minas Gerais, Escola de Engenharia - Departamento de Engenharia Nuclear, Programa de Pós-graduação em Ciências e Técnicas Nucleares, Av. Pres. Antônio Carlos 6627, Belo Horizonte MG, Brazil.
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Akhavanallaf A, Fayad H, Salimi Y, Aly A, Kharita H, Al Naemi H, Zaidi H. An update on computational anthropomorphic anatomical models. Digit Health 2022; 8:20552076221111941. [PMID: 35847523 PMCID: PMC9277432 DOI: 10.1177/20552076221111941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 06/19/2022] [Indexed: 11/15/2022] Open
Abstract
The prevalent availability of high-performance computing coupled with validated computerized simulation platforms as open-source packages have motivated progress in the development of realistic anthropomorphic computational models of the human anatomy. The main application of these advanced tools focused on imaging physics and computational internal/external radiation dosimetry research. This paper provides an updated review of state-of-the-art developments and recent advances in the design of sophisticated computational models of the human anatomy with a particular focus on their use in radiation dosimetry calculations. The consolidation of flexible and realistic computational models with biological data and accurate radiation transport modeling tools enables the capability to produce dosimetric data reflecting actual setup in clinical setting. These simulation methodologies and results are helpful resources for the medical physics and medical imaging communities and are expected to impact the fields of medical imaging and dosimetry calculations profoundly.
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Affiliation(s)
- Azadeh Akhavanallaf
- Division of Nuclear Medicine and Molecular Imaging, Geneva University Hospital, Geneva, Switzerland
| | - Hadi Fayad
- Hamad Medical Corporation, Doha, Qatar
- Weill Cornell Medicine, Doha, Qatar
| | - Yazdan Salimi
- Division of Nuclear Medicine and Molecular Imaging, Geneva University Hospital, Geneva, Switzerland
| | - Antar Aly
- Hamad Medical Corporation, Doha, Qatar
- Weill Cornell Medicine, Doha, Qatar
| | | | - Huda Al Naemi
- Hamad Medical Corporation, Doha, Qatar
- Weill Cornell Medicine, Doha, Qatar
| | - Habib Zaidi
- Division of Nuclear Medicine and Molecular Imaging, Geneva University Hospital, Geneva, Switzerland
- Geneva University Neurocenter, Geneva University, Geneva,
Switzerland
- Department of Nuclear Medicine and Molecular Imaging, University
Medical Center Groningen, University of Groningen, Groningen, Netherlands
- Department of Nuclear Medicine, University of Southern Denmark,
Odense, Denmark
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Monte Carlo simulation and dosimetry measurements of an experimental approach for in vitro HDR brachytherapy irradiation. Appl Radiat Isot 2021; 172:109666. [PMID: 33773203 DOI: 10.1016/j.apradiso.2021.109666] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2020] [Revised: 01/09/2021] [Accepted: 02/23/2021] [Indexed: 11/20/2022]
Abstract
Irradiation of tumor cell lines is a useful way to investigate the effects of ionizing radiation on biological molecules. We designed an easy and reproducible approach for in vitro experimental high dose rate brachytherapy, which was simulated by a Monte Carlo code and dosimetrically characterized by experimental methods to evaluate the correspondence between planned doses and doses absorbed by the cells. This approach is an acrylic platform containing T25 tissue culture flasks and multiwell tissue culture plates. It allows nine parallel needles carrying an 192Ir source to irradiate the adherent cells. The whole system composed of the acrylic platform, tissue culture flasks and 192Ir source tracking was simulated by the Monte Carlo N-Particle transport code (MCNPX). Dosimetric measurements were taken by well ionization chamber and radiochromic films. There was a slight difference, averaging from 2% to 7%, between the MCNPX results and film dosimetry results regarding uniform radiation created by the source arrangement. The results showed different values for planned and measured doses in each cell culture plate, which was attributed to the non-equivalent water material used and to the lack of full scattering coming from the top of the platform. This last contribution was different for each tissue culture plate and an individual dose correction factor was calculated. The dose correction factor must be applied to match the planned dose and the actual doses absorbed by the cells. The designed approach is an efficient tool for in vitro brachytherapy experiments for most commercial cell culture plates.
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Abadi E, Segars WP, Tsui BMW, Kinahan PE, Bottenus N, Frangi AF, Maidment A, Lo J, Samei E. Virtual clinical trials in medical imaging: a review. J Med Imaging (Bellingham) 2020; 7:042805. [PMID: 32313817 PMCID: PMC7148435 DOI: 10.1117/1.jmi.7.4.042805] [Citation(s) in RCA: 73] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 03/23/2020] [Indexed: 12/13/2022] Open
Abstract
The accelerating complexity and variety of medical imaging devices and methods have outpaced the ability to evaluate and optimize their design and clinical use. This is a significant and increasing challenge for both scientific investigations and clinical applications. Evaluations would ideally be done using clinical imaging trials. These experiments, however, are often not practical due to ethical limitations, expense, time requirements, or lack of ground truth. Virtual clinical trials (VCTs) (also known as in silico imaging trials or virtual imaging trials) offer an alternative means to efficiently evaluate medical imaging technologies virtually. They do so by simulating the patients, imaging systems, and interpreters. The field of VCTs has been constantly advanced over the past decades in multiple areas. We summarize the major developments and current status of the field of VCTs in medical imaging. We review the core components of a VCT: computational phantoms, simulators of different imaging modalities, and interpretation models. We also highlight some of the applications of VCTs across various imaging modalities.
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Affiliation(s)
- Ehsan Abadi
- Duke University, Department of Radiology, Durham, North Carolina, United States
| | - William P. Segars
- Duke University, Department of Radiology, Durham, North Carolina, United States
| | - Benjamin M. W. Tsui
- Johns Hopkins University, Department of Radiology, Baltimore, Maryland, United States
| | - Paul E. Kinahan
- University of Washington, Department of Radiology, Seattle, Washington, United States
| | - Nick Bottenus
- Duke University, Department of Biomedical Engineering, Durham, North Carolina, United States
- University of Colorado Boulder, Department of Mechanical Engineering, Boulder, Colorado, United States
| | - Alejandro F. Frangi
- University of Leeds, School of Computing, Leeds, United Kingdom
- University of Leeds, School of Medicine, Leeds, United Kingdom
| | - Andrew Maidment
- University of Pennsylvania, Department of Radiology, Philadelphia, Pennsylvania, United States
| | - Joseph Lo
- Duke University, Department of Radiology, Durham, North Carolina, United States
| | - Ehsan Samei
- Duke University, Department of Radiology, Durham, North Carolina, United States
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Development of a physical head phantom using of a solid brain equivalent tissue for the calibration of the 18F-FDG internal monitoring system. Radiat Phys Chem Oxf Engl 1993 2019. [DOI: 10.1016/j.radphyschem.2018.08.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Kainz W, Neufeld E, Bolch WE, Graff CG, Kim CH, Kuster N, Lloyd B, Morrison T, Segars P, Yeom YS, Zankl M, Xu XG, Tsui BMW. Advances in Computational Human Phantoms and Their Applications in Biomedical Engineering - A Topical Review. IEEE TRANSACTIONS ON RADIATION AND PLASMA MEDICAL SCIENCES 2019; 3:1-23. [PMID: 30740582 PMCID: PMC6362464 DOI: 10.1109/trpms.2018.2883437] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Over the past decades, significant improvements have been made in the field of computational human phantoms (CHPs) and their applications in biomedical engineering. Their sophistication has dramatically increased. The very first CHPs were composed of simple geometric volumes, e.g., cylinders and spheres, while current CHPs have a high resolution, cover a substantial range of the patient population, have high anatomical accuracy, are poseable, morphable, and are augmented with various details to perform functionalized computations. Advances in imaging techniques and semi-automated segmentation tools allow fast and personalized development of CHPs. These advances open the door to quickly develop personalized CHPs, inherently including the disease of the patient. Because many of these CHPs are increasingly providing data for regulatory submissions of various medical devices, the validity, anatomical accuracy, and availability to cover the entire patient population is of utmost importance. The article is organized into two main sections: the first section reviews the different modeling techniques used to create CHPs, whereas the second section discusses various applications of CHPs in biomedical engineering. Each topic gives an overview, a brief history, recent developments, and an outlook into the future.
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Affiliation(s)
- Wolfgang Kainz
- Food and Drug Administration (FDA), Center for Devices and Radiological Health (CDRH), Silver Spring, MD 20993 USA
| | - Esra Neufeld
- Foundation for Research on Information Technologies in Society (IT'IS), Zurich, Switzerland
| | | | - Christian G Graff
- Food and Drug Administration (FDA), Center for Devices and Radiological Health (CDRH), Silver Spring, MD 20993 USA
| | | | - Niels Kuster
- Swiss Federal Institute of Technology, ETH Zürich, and the Foundation for Research on Information Technologies in Society (IT'IS), Zürich, Switzerland
| | - Bryn Lloyd
- Foundation for Research on Information Technologies in Society (IT'IS), Zurich, Switzerland
| | - Tina Morrison
- Food and Drug Administration (FDA), Center for Devices and Radiological Health (CDRH), Silver Spring, MD 20993 USA
| | | | | | - Maria Zankl
- Helmholtz Zentrum München German Research Center for Environmental Health, Munich, Germany
| | - X George Xu
- Rensselaer Polytechnic Institute, Troy, NY, USA
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Fonseca T, Mendes B, Hunt J. Simulation of internal contamination screening with dose rate meters. Radiat Phys Chem Oxf Engl 1993 2017. [DOI: 10.1016/j.radphyschem.2017.03.047] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Alves MC, Galeano DC, Santos WS, Lee C, Bolch WE, Hunt JG, da Silva AX, Carvalho AB. Comparison of the effective dose rate to aircrew members using hybrid computational phantoms in standing and sitting postures. JOURNAL OF RADIOLOGICAL PROTECTION : OFFICIAL JOURNAL OF THE SOCIETY FOR RADIOLOGICAL PROTECTION 2016; 36:885-901. [PMID: 27798410 DOI: 10.1088/0952-4746/36/4/885] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Aircraft crew members are occupationally exposed to considerable levels of cosmic radiation at flight altitudes. Since aircrew (pilots and passengers) are in the sitting posture for most of the time during flight, and up to now there has been no data on the effective dose rate calculated for aircrew dosimetry in flight altitude using a sitting phantom, we therefore calculated the effective dose rate using a phantom in the sitting and standing postures in order to compare the influence of the posture on the radiation protection of aircrew members. We found that although the better description of the posture in which the aircrews are exposed, the results of the effective dose rate calculated with the phantom in the sitting posture were very similar to the results of the phantom in the standing posture. In fact we observed only a 1% difference. These findings indicate the adequacy of the use of dose conversion coefficients for the phantom in the standing posture in aircrew dosimetry. We also validated our results comparing the effective dose rate obtained using the standing phantom with values reported in the literature. It was observed that the results presented in this study are in good agreement with other authors (the differences are below 30%) who have measured and calculated effective dose rates using different phantoms.
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Affiliation(s)
- M C Alves
- Departamento de Física, Universidade Federal de Sergipe; Campus Prof. José Aloísio de Campos, 49.100-000, São Cristóvão, SE, Brazil
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Paiva FG, Oliveira AHD, Mendes BM, Pinto JR, Filho NDNA, Dantas BM, Dantas ALA, Silva TAD, Lacerda MADS, Fonseca TCF. Improvement of the WBC calibration of the Internal Dosimetry Laboratory of the CDTN/CNEN using the physical phantom BOMAB and MCNPX code. Appl Radiat Isot 2016; 117:123-127. [PMID: 26778764 DOI: 10.1016/j.apradiso.2015.12.059] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 12/23/2015] [Accepted: 12/29/2015] [Indexed: 10/22/2022]
Abstract
The Laboratory of Internal Dosimetry of the Center for Development of Nuclear Technology (LDI/CDTN) is responsible for routine internal monitoring of occupationally exposed individuals. The determination of photon emitting radionuclides in the human body requires calibration of the detector in specific counting geometries. The calibration process uses physical phantoms containing certified activities of the radionuclides of interest. The objective of this work was to obtain calibration efficiency curves of the Whole Body Counter in operation at the LDI/CDTN using a BOMAB physical phantom and Monte Carlo simulations.
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Affiliation(s)
- Fernanda Guerra Paiva
- Departamento de Engenharia Nuclear - Programa de Pós Graduação em Ciências e Técnicas Nucleares, Universidade Federal de Minas Gerais, Av. Pres. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Arno Heeren de Oliveira
- Departamento de Engenharia Nuclear - Programa de Pós Graduação em Ciências e Técnicas Nucleares, Universidade Federal de Minas Gerais, Av. Pres. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Bruno Melo Mendes
- Centro de Desenvolvimento da Tecnologia Nuclear - CDTN/CNEN, Av. Pres. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Jacqueline Rosária Pinto
- Centro de Desenvolvimento da Tecnologia Nuclear - CDTN/CNEN, Av. Pres. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Nelson do Nascimento A Filho
- Centro de Desenvolvimento da Tecnologia Nuclear - CDTN/CNEN, Av. Pres. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG, Brazil
| | - Bernardo Maranhão Dantas
- Instituto de Radioproteção e Dosimetria - IRD/CNEN, Av. Salvador Allende s/n-Barra da Tijuca, 22783-127 Rio de Janeiro, RJ, Brazil
| | - Ana Letícia A Dantas
- Instituto de Radioproteção e Dosimetria - IRD/CNEN, Av. Salvador Allende s/n-Barra da Tijuca, 22783-127 Rio de Janeiro, RJ, Brazil
| | - Teógenes Augusto da Silva
- Programa de Pós Graduação do Centro de Desenvolvimento da Tecnologia Nuclear - CDTN/CNEN, Av. Pres. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG Brazil
| | - Marco Aurélio de Sousa Lacerda
- Programa de Pós Graduação do Centro de Desenvolvimento da Tecnologia Nuclear - CDTN/CNEN, Av. Pres. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG Brazil
| | - Telma Cristina Ferreira Fonseca
- Programa de Pós Graduação do Centro de Desenvolvimento da Tecnologia Nuclear - CDTN/CNEN, Av. Pres. Antônio Carlos, 6627, 31270-901 Belo Horizonte, MG Brazil.
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