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Van Dyck I, Vanhoudt N, Vives I Batlle J, Vargas CS, Horemans N, Van Gompel A, Nauts R, Wijgaerts A, Marchal W, Claesen J, Vangronsveld J. Differentiation between chemo- and radiotoxicity of 137Cs and 60Co on Lemna minor. J Environ Radioact 2024; 272:107351. [PMID: 38064934 DOI: 10.1016/j.jenvrad.2023.107351] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 11/13/2023] [Accepted: 11/28/2023] [Indexed: 01/29/2024]
Abstract
The uptake and effects of stable Cs and Co on L.minor were extensively studied, together with the effects of gamma radiation using a 137Cs or 60Co source. Innovative is that we combined external irradiation (from 137Cs or 60Co sources) with the direct uptake of certain amounts of stable Cs or Co to simulate the impact of the same mass of a radioisotope compared with that of the stable element. Such approach allows to differentiate between chemo- and radiotoxicity of 137Cs or 60Co, permitting to study the 137Cs and 60Co uptake by L. minor without using high concentrations of these elements in solution. Our results indicate that radiotoxicity of both 137Cs and 60Co has a greater importance compared to their chemotoxicity. This was also supported by the independent action and concentration addition concepts. Both concepts resulted in a good prediction of the dose-response curve of the combination exposure. The maximal removal of 137Cs or 60Co per gram dry matter of L. minor was lower compared with the removal of the corresponding stable isotope. The toxicity of 60Co was higher compared to 137Cs based on EC50 values and uptake data. With respect to the effects on photosynthetic pigments, starch and soluble sugars contents, only starch increased in a concentration- and dose-dependent manner.
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Affiliation(s)
- Isabelle Van Dyck
- Belgian Nuclear Research Centre (SCK CEN), Biosphere Impact Studies, Boeretang 200, 2400, Mol, Belgium; UHasselt - Hasselt University, Centre for Environmental Sciences, Agoralaan Building D, 3590, Diepenbeek, Belgium
| | - Nathalie Vanhoudt
- Belgian Nuclear Research Centre (SCK CEN), Biosphere Impact Studies, Boeretang 200, 2400, Mol, Belgium.
| | - Jordi Vives I Batlle
- Belgian Nuclear Research Centre (SCK CEN), Biosphere Impact Studies, Boeretang 200, 2400, Mol, Belgium
| | - Clarita Saldarriaga Vargas
- Belgian Nuclear Research Centre (SCK CEN), Radiation Protection Dosimetry and Calibrations, Boeretang 200, 2400, Mol, Belgium
| | - Nele Horemans
- Belgian Nuclear Research Centre (SCK CEN), Biosphere Impact Studies, Boeretang 200, 2400, Mol, Belgium; UHasselt - Hasselt University, Centre for Environmental Sciences, Agoralaan Building D, 3590, Diepenbeek, Belgium
| | - Axel Van Gompel
- Belgian Nuclear Research Centre (SCK CEN), Biosphere Impact Studies, Boeretang 200, 2400, Mol, Belgium
| | - Robin Nauts
- Belgian Nuclear Research Centre (SCK CEN), Biosphere Impact Studies, Boeretang 200, 2400, Mol, Belgium
| | - Ann Wijgaerts
- UHasselt - Hasselt University, Centre for Environmental Sciences, Agoralaan Building D, 3590, Diepenbeek, Belgium
| | - Wouter Marchal
- UHasselt - Hasselt University, Institute for Materials Research (IMO-IMOMEC), Analytical & Circular Chemistry (ACC), Agoralaan Building D, 3590, Diepenbeek, Belgium
| | - Jürgen Claesen
- Department of Epidemiology and Data Science, Amsterdam University Medical Centers, Amsterdam, Netherlands
| | - Jaco Vangronsveld
- UHasselt - Hasselt University, Centre for Environmental Sciences, Agoralaan Building D, 3590, Diepenbeek, Belgium; Maria Curie-Skłodowska University, Department of Plant Physiology and Biophysics, Institute of Biological Sciences, Akademicka 19, 20-033, Lublin, Poland
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Saldarriaga Vargas C, Andersson M, Bouvier-Capely C, Li WB, Madas B, Covens P, Struelens L, Strigari L. Heterogeneity of absorbed dose distribution in kidney tissues and dose–response modelling of nephrotoxicity in radiopharmaceutical therapy with beta-particle emitters: A review. Z Med Phys 2023:S0939-3889(23)00037-5. [PMID: 37031068 DOI: 10.1016/j.zemedi.2023.02.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 02/20/2023] [Accepted: 02/27/2023] [Indexed: 04/08/2023]
Abstract
Absorbed dose heterogeneity in kidney tissues is an important issue in radiopharmaceutical therapy. The effect of absorbed dose heterogeneity in nephrotoxicity is, however, not fully understood yet, which hampers the implementation of treatment optimization by obscuring the interpretation of clinical response data and the selection of optimal treatment options. Although some dosimetry methods have been developed for kidney dosimetry to the level of microscopic renal substructures, the clinical assessment of the microscopic distribution of radiopharmaceuticals in kidney tissues currently remains a challenge. This restricts the anatomical resolution of clinical dosimetry, which hinders a thorough clinical investigation of the impact of absorbed dose heterogeneity. The potential of absorbed dose-response modelling to support individual treatment optimization in radiopharmaceutical therapy is recognized and gaining attraction. However, biophysical modelling is currently underexplored for the kidney, where particular modelling challenges arise from the convolution of a complex functional organization of renal tissues with the function-mediated dose distribution of radiopharmaceuticals. This article reviews and discusses the heterogeneity of absorbed dose distribution in kidney tissues and the absorbed dose-response modelling of nephrotoxicity in radiopharmaceutical therapy. The review focuses mainly on the peptide receptor radionuclide therapy with beta-particle emitting somatostatin analogues, for which the scientific literature reflects over two decades of clinical experience. Additionally, detailed research perspectives are proposed to address various identified challenges to progress in this field.
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Vargas CS, Struelens L, D'Huyvetter M, Caveliers V, Covens P. A Realistic Multiregion Mouse Kidney Dosimetry Model to Support the Preclinical Evaluation of Potential Nephrotoxicity of Radiopharmaceutical Therapy. J Nucl Med 2023; 64:493-499. [PMID: 36229185 DOI: 10.2967/jnumed.122.264453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 09/01/2022] [Accepted: 09/01/2022] [Indexed: 11/16/2022] Open
Abstract
Suborgan absorbed dose estimates in mouse kidneys are crucial to support preclinical nephrotoxicity analyses of α- and β-particle-emitting radioligands exhibiting a heterogeneous activity distribution in the kidneys. This is, however, limited by the scarcity of reference dose factors (S values) available in the literature for specific mouse kidney tissues. Methods: A computational multiregion model of a mouse kidney based on high-resolution MRI data from a healthy mouse kidney was developed. The model was used to calculate S values for 5 kidney tissues (cortex, outer and inner stripes of outer medulla, inner medulla, and papilla and pelvis) for a wide range of β- or α-emitting radionuclides (45 in total) of interest for radiopharmaceutical therapy, using Monte Carlo calculations. Additionally, regional S values were applied for a 131I-labeled single-domain antibody fragment with predominant retention in the outer stripe of the renal outer medulla. Results: The heterogeneous activity distribution in kidneys of considered α- and low- to medium-energy β-emitters considerably affected the absorbed dose estimation in specific suborgan regions. The suborgan tissue doses resulting from the nonuniform distribution of the 131I-labeled antibody fragment largely deviated (from -40% to 57%) from the mean kidney dose resulting from an assumed uniform activity distribution throughout the whole kidney. The absorbed dose in the renal outer stripe was about 2.0 times higher than in the cortex and in the inner stripe and about 2.6 times higher than in inner tissues. Conclusion: The use of kidney regional S values allows a more realistic estimation of the absorbed dose in different renal tissues from therapeutic radioligands with a heterogeneous uptake in the kidneys. This constitutes an improvement from the simplistic (less accurate) renal dose estimates assuming a uniform distribution of activity throughout kidney tissues. Such improvement in dosimetry is expected to support preclinical studies essential for a better understanding of nephrotoxicity in humans. The dosimetric database has added value in the development of new molecular vectors for radiopharmaceutical therapy.
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Affiliation(s)
- Clarita Saldarriaga Vargas
- Radiation Protection Dosimetry and Calibrations, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium; and .,Department of Medical Imaging, Laboratory for In Vivo Cellular and Molecular Imaging, Vrije Universiteit Brussel, Brussels, Belgium
| | - Lara Struelens
- Radiation Protection Dosimetry and Calibrations, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium; and
| | - Matthias D'Huyvetter
- Department of Medical Imaging, Laboratory for In Vivo Cellular and Molecular Imaging, Vrije Universiteit Brussel, Brussels, Belgium
| | - Vicky Caveliers
- Department of Medical Imaging, Laboratory for In Vivo Cellular and Molecular Imaging, Vrije Universiteit Brussel, Brussels, Belgium
| | - Peter Covens
- Department of Medical Imaging, Laboratory for In Vivo Cellular and Molecular Imaging, Vrije Universiteit Brussel, Brussels, Belgium
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Li WB, Bouvier-Capely C, Saldarriaga Vargas C, Andersson M, Madas B. Heterogeneity of dose distribution in normal tissues in case of radiopharmaceutical therapy with alpha-emitting radionuclides. Radiat Environ Biophys 2022; 61:579-596. [PMID: 36239799 PMCID: PMC9630198 DOI: 10.1007/s00411-022-01000-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 10/06/2022] [Indexed: 05/10/2023]
Abstract
Heterogeneity of dose distribution has been shown at different spatial scales in diagnostic nuclear medicine. In cancer treatment using new radiopharmaceuticals with alpha-particle emitters, it has shown an extensive degree of dose heterogeneity affecting both tumour control and toxicity of organs at risk. This review aims to provide an overview of generalized internal dosimetry in nuclear medicine and highlight the need of consideration of the dose heterogeneity within organs at risk. The current methods used for patient dosimetry in radiopharmaceutical therapy are summarized. Bio-distribution and dose heterogeneities of alpha-particle emitting pharmaceutical 223Ra (Xofigo) within bone tissues are presented as an example. In line with the strategical research agendas of the Multidisciplinary European Low Dose Initiative (MELODI) and the European Radiation Dosimetry Group (EURADOS), future research direction of pharmacokinetic modelling and dosimetry in patient radiopharmaceutical therapy are recommended.
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Affiliation(s)
- Wei Bo Li
- Helmholtz Zentrum München-German Research Center for Environmental Health (GmbH), Institute of Radiation Medicine, Neuherberg, Germany.
| | - Céline Bouvier-Capely
- Institut de Radioprotection et Sûreté Nucléaire (IRSN), PSE-SANTE/SESANE/LRSI, Fontenay-aux-Roses, France
| | - Clarita Saldarriaga Vargas
- Radiation Protection Dosimetry and Calibrations, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
- In Vivo Cellular and Molecular Imaging Laboratory, Vrije Universiteit Brussel, Brussels, Belgium
| | - Michelle Andersson
- Radiation Protection Dosimetry and Calibrations, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
- Medical Physics Department, Jules Bordet Institute, Université Libre de Bruxelles, Brussels, Belgium
| | - Balázs Madas
- Environmental Physics Department, Centre for Energy Research, Budapest, Hungary
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Castillo Seoane D, De Saint-Hubert M, Ahenkorah S, Saldarriaga Vargas C, Ooms M, Struelens L, Koole M. Gamma counting protocols for the accurate quantification of 225Ac and 213Bi without the need for a secular equilibrium between parent and gamma-emitting daughter. EJNMMI Radiopharm Chem 2022; 7:28. [PMID: 36274098 PMCID: PMC9588853 DOI: 10.1186/s41181-022-00174-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 08/22/2022] [Indexed: 11/22/2022] Open
Abstract
BACKGROUND Quantification of actinium-225 through gamma counter measurements, when there is no secular equilibrium between actinium-225 and its gamma emitting daughters bismuth-213 and/or francium-221, can provide valuable information regarding the possible relocation of recoiled daughters such that related radiotoxicity effects can be evaluated. This study proposes a multiple time-point protocol using the bismuth-213 photopeak with measurements before secular equilibrium between actinium-225 and bismuth-213, and a single time-point protocol using both the francium-221 and bismuth-213 photopeak while assuming secular equilibrium between actinium-225 and francium-221 but not between bismuth-213 and actinium-225. RESULTS Good agreement (i.e. 3% accuracy) was obtained when relying on a multiple time-points measurement of bismuth-213 to quantify both actinium-225 and excess of bismuth-213. Following scatter correction, actinium-225 can be accurately quantified using the francium-221 in a single time-point measurement within 3% of accuracy. The analysis performed on the stability data of [225Ac]Ac-DEPA and [225Ac]Ac-DOTA complexes, before secular equilibrium between bismuth-213 and actinium-225 was formed, revealed considerable amounts of unbound bismuth-213 (i.e. more than 90%) after 24 h of the radiolabeling most likely due to the recoiled daughter effect. CONCLUSION Both protocols were able to accurately estimate 225Ac-activities provided the francium-221 energy window was corrected for the down scatter of the higher-energy gamma-emissions by bismuth-213. This could prove beneficial to study the recoiled daughter effect and redistribution of free bismuth-213 by monitoring the accumulation or clearance of bismuth-213 in different tissues during biodistribution studies or in patient samples during clinical studies. On the other hand, the single gamma counter measurement protocol, although required a 30 min waiting time, is more time and cost efficient and therefore more appropriate for standardized quality control procedures of 225Ac-labeled radiopharmaceuticals.
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Affiliation(s)
- Dayana Castillo Seoane
- Unit of Nuclear Medicine and Molecular Imaging, Department of Imaging and Pathology, Katholieke Universiteit Leuven (KUL), Louvain, Belgium.
- Research Unit in Dosimetric Applications, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium.
| | - Marijke De Saint-Hubert
- Research Unit in Dosimetric Applications, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
| | - Stephen Ahenkorah
- NURA Research Group, Belgian Nuclear Research Center (SCK CEN), Mol, Belgium
- Unit of Radiopharmaceutical Research, Department of Pharmaceutical and Pharmacological Sciences, Katholieke Universiteit Leuven (KUL), Louvain, Belgium
| | - Clarita Saldarriaga Vargas
- Research Unit in Dosimetric Applications, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
- Department of Medical Imaging, Laboratory for In Vivo Cellular and Molecular Imaging, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Maarten Ooms
- NURA Research Group, Belgian Nuclear Research Center (SCK CEN), Mol, Belgium
| | - Lara Struelens
- Research Unit in Dosimetric Applications, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium
| | - Michel Koole
- Unit of Nuclear Medicine and Molecular Imaging, Department of Imaging and Pathology, Katholieke Universiteit Leuven (KUL), Louvain, Belgium
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Živanović M, Vukanac I, Samac J, Antić V, Jeremić M, Janković D, Kandić A, Vargas CS, Struelens L, Ciraj-Bjelac O. Intercomparison and performance assessment of radionuclide calibrators used in nuclear medicine departments in Serbia. Appl Radiat Isot 2021; 179:110013. [PMID: 34741955 DOI: 10.1016/j.apradiso.2021.110013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 10/26/2021] [Accepted: 10/27/2021] [Indexed: 11/16/2022]
Abstract
The purpose of this work is to assess accuracy and compare the performance of radionuclide calibrators (RNCs) used in nuclear medicine departments in Serbia. Testing of the RNCs included verification of measurement accuracy, as well as analysis of routinely used quality control protocols, by using the certified radioactivity standards (57Co, 137Cs). RNCs performances were assessed with 99mTc through comparison of reference value for radionuclide activity and RNC measurements. Results of the intercomparison revealed that RNCs, 15 in total, are accurate within 10% in vial geometry and within 15% in syringe geometry. Most of them showed similar performance. The results revealed that container geometry is an important influencing parameter in the accuracy of activity measurement. Obtained results indicate a need for regular calibration and implementation of Quality Control program in order to achieve and maintain the accuracy of activity measurements in nuclear medicine.
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Affiliation(s)
- Miloš Živanović
- "VINCA" Institute of Nuclear Sciences - National Institute of Thе Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Ivana Vukanac
- "VINCA" Institute of Nuclear Sciences - National Institute of Thе Republic of Serbia, University of Belgrade, Belgrade, Serbia.
| | - Jelena Samac
- Clinical Center of Vojvodina, Center of Laboratory Medicine, Novi Sad, Serbia; University of Novi Sad, Faculty of Sciences, Department of Physics, Novi Sad, Serbia
| | | | - Marija Jeremić
- Department of Nuclear Medicine, Clinical Centre Kragujevac, Kragujevac, Serbia
| | - Drina Janković
- "VINCA" Institute of Nuclear Sciences - National Institute of Thе Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | - Aleksandar Kandić
- "VINCA" Institute of Nuclear Sciences - National Institute of Thе Republic of Serbia, University of Belgrade, Belgrade, Serbia
| | | | - Lara Struelens
- Belgian Nuclear Research Centre (SCK CEN), Boeretang 200, 2400, Mol, Belgium
| | - Olivera Ciraj-Bjelac
- "VINCA" Institute of Nuclear Sciences - National Institute of Thе Republic of Serbia, University of Belgrade, Belgrade, Serbia; School of Electrical Engineering, University of Belgrade, Belgrade, Serbia
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Saldarriaga Vargas C, Bauwens M, Pooters INA, Pommé S, Peters SMB, Segbers M, Jentzen W, Vogg A, van Velden FHP, Meyer Viol SL, Gotthardt M, Mottaghy FM, Wildberger JE, Covens P, Wierts R. An international multi-center investigation on the accuracy of radionuclide calibrators in nuclear medicine theragnostics. EJNMMI Phys 2020; 7:69. [PMID: 33226485 PMCID: PMC7683758 DOI: 10.1186/s40658-020-00338-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 11/10/2020] [Indexed: 01/20/2023] Open
Abstract
Background Personalized molecular radiotherapy based on theragnostics requires accurate quantification of the amount of radiopharmaceutical activity administered to patients both in diagnostic and therapeutic applications. This international multi-center study aims to investigate the clinical measurement accuracy of radionuclide calibrators for 7 radionuclides used in theragnostics: 99mTc, 111In, 123I, 124I, 131I, 177Lu, and 90Y. Methods In total, 32 radionuclide calibrators from 8 hospitals located in the Netherlands, Belgium, and Germany were tested. For each radionuclide, a set of four samples comprising two clinical containers (10-mL glass vial and 3-mL syringe) with two filling volumes were measured. The reference value of each sample was determined by two certified radioactivity calibration centers (SCK CEN and JRC) using two secondary standard ionization chambers. The deviation in measured activity with respect to the reference value was determined for each radionuclide and each measurement geometry. In addition, the combined systematic deviation of activity measurements in a theragnostic setting was evaluated for 5 clinically relevant theragnostic pairs: 131I/123I, 131I/124I, 177Lu/111In, 90Y/99mTc, and 90Y/111In. Results For 99mTc, 131I, and 177Lu, a small minority of measurements were not within ± 5% range from the reference activity (percentage of measurements not within range: 99mTc, 6%; 131I, 14%; 177Lu, 24%) and almost none were outside ± 10% range. However, for 111In, 123I, 124I, and 90Y, more than half of all measurements were not accurate within ± 5% range (111In, 51%; 123I, 83%; 124I, 63%; 90Y, 61%) and not all were within ± 10% margin (111In, 22%; 123I, 35%; 124I, 15%; 90Y, 25%). A large variability in measurement accuracy was observed between radionuclide calibrator systems, type of sample container (vial vs syringe), and source-geometry calibration/correction settings used. Consequently, we observed large combined deviations (percentage deviation > ± 10%) for the investigated theragnostic pairs, in particular for 90Y/111In, 131I/123I, and 90Y/99mTc. Conclusions Our study shows that substantial over- or underestimation of therapeutic patient doses is likely to occur in a theragnostic setting due to errors in the assessment of radioactivity with radionuclide calibrators. These findings underline the importance of thorough validation of radionuclide calibrator systems for each clinically relevant radionuclide and sample geometry. Supplementary Information The online version contains supplementary material available at 10.1186/s40658-020-00338-3.
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Affiliation(s)
- Clarita Saldarriaga Vargas
- Radiation Protection Dosimetry and Calibrations, Belgian Nuclear Research Centre (SCK CEN), Mol, Belgium.,In vivo Cellular and Molecular Imaging, Vrije Universiteit Brussel, Jette, Belgium
| | - Matthias Bauwens
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, P.O. Box 5800, 6202, AZ, Maastricht, The Netherlands
| | - Ivo N A Pooters
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, P.O. Box 5800, 6202, AZ, Maastricht, The Netherlands
| | - Stefaan Pommé
- European Commission, Joint Research Centre (JRC), Geel, Belgium
| | - Steffie M B Peters
- Department of Radiology, Nuclear Medicine and Anatomy, Radboudumc, Nijmegen, The Netherlands
| | - Marcel Segbers
- Department of Radiology and Nuclear Medicine, Erasmus MC, Rotterdam, The Netherlands
| | - Walter Jentzen
- Department of Nuclear Medicine, University of Duisburg-Essen, Essen, Germany
| | - Andreas Vogg
- Department of Nuclear Medicine, University Hospital RWTH Aachen University, Aachen, Germany
| | | | - Sebastiaan L Meyer Viol
- Department of Radiology and Nuclear Medicine, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Martin Gotthardt
- Department of Radiology, Nuclear Medicine and Anatomy, Radboudumc, Nijmegen, The Netherlands
| | - Felix M Mottaghy
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, P.O. Box 5800, 6202, AZ, Maastricht, The Netherlands.,Department of Nuclear Medicine, University Hospital RWTH Aachen University, Aachen, Germany
| | - Joachim E Wildberger
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, P.O. Box 5800, 6202, AZ, Maastricht, The Netherlands
| | - Peter Covens
- In vivo Cellular and Molecular Imaging, Vrije Universiteit Brussel, Jette, Belgium
| | - Roel Wierts
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, P.O. Box 5800, 6202, AZ, Maastricht, The Netherlands.
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Saldarriaga Vargas C, Rodríguez Pérez S, Baete K, Pommé S, Paepen J, Van Ammel R, Struelens L. Intercomparison of 99m Tc, 18 F and 111 In activity measurements with radionuclide calibrators in Belgian hospitals. Phys Med 2018; 45:134-142. [DOI: 10.1016/j.ejmp.2017.12.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Revised: 12/12/2017] [Accepted: 12/15/2017] [Indexed: 10/18/2022] Open
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Vargas CS, Struelens L, Vanhavere F. Abstract ID: 73 Design of a personal dosimeter for estimating the effective dose of medical staff when wearing radioprotective garments using Monte Carlo simulations. Phys Med 2017. [DOI: 10.1016/j.ejmp.2017.09.035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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De Smet V, De Saint-Hubert M, Dinar N, Manessi GP, Aza E, Cassell C, Saldarriaga Vargas C, Van Hoey O, Mathot G, Stichelbaut F, De Lentdecker G, Gerardy I, Silari M, Vanhavere F. Secondary neutrons inside a proton therapy facility: MCNPX simulations compared to measurements performed with a Bonner Sphere Spectrometer and neutron H*(10) monitors. RADIAT MEAS 2017. [DOI: 10.1016/j.radmeas.2017.03.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kong Y, Struelens L, Vanhavere F, Vargas CS, Schoonjans W, Zhuo WH. Influence of standing positions and beam projections on effective dose and eye lens dose of anaesthetists in interventional procedures. Radiat Prot Dosimetry 2015; 163:181-187. [PMID: 24795393 DOI: 10.1093/rpd/ncu148] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
More and more anaesthetists are getting involved in interventional radiology procedures and so it is important to know the radiation dose and to optimise protection for anaesthetists. In this study, based on Monte Carlo simulations and field measurements, both the whole-body doses and eye lens dose of anaesthetists were studied. The results showed that the radiation exposure to anaesthetists not only depends on their workload, but also largely varies with their standing positions and beam projections during interventional procedures. The simulation results showed that the effective dose to anaesthetists may vary with their standing positions and beam projections to more than a factor of 10, and the eye lens dose may vary with the standing positions and beam projections to more than a factor of 200. In general, a close position to the bed and the left lateral (LLAT) beam projection will bring a high exposure to anaesthetists. Good correlations between the eye lens dose and the doses at the neck, chest and waist over the apron were observed from the field measurements. The results indicate that adequate arrangements of anaesthesia device or other monitoring equipment in the fluoroscopy rooms are useful measures to reduce the radiation exposure to anaesthetists, and anaesthetists should be aware that they will receive the highest doses under left lateral beam projection.
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Affiliation(s)
- Y Kong
- Institute of Radiation Medicine, Fudan University, Xietu Road 2094, Shanghai 200032, China
| | - L Struelens
- Radiation Protection Dosimetry and Calibration, Belgian Nuclear Research Centre, SCK·CEN, Boeretang 200, Mol 2400, Belgium
| | - F Vanhavere
- Radiation Protection Dosimetry and Calibration, Belgian Nuclear Research Centre, SCK·CEN, Boeretang 200, Mol 2400, Belgium
| | - C S Vargas
- Radiation Protection Dosimetry and Calibration, Belgian Nuclear Research Centre, SCK·CEN, Boeretang 200, Mol 2400, Belgium
| | - W Schoonjans
- Radiation Protection Dosimetry and Calibration, Belgian Nuclear Research Centre, SCK·CEN, Boeretang 200, Mol 2400, Belgium
| | - W H Zhuo
- Institute of Radiation Medicine, Fudan University, Xietu Road 2094, Shanghai 200032, China
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