1
|
Shishkina E, Shuiskaya A, Sharagin P. Bone marrow dosimetry for mice: exposure from bone-seeking 89,90Sr. RADIATION AND ENVIRONMENTAL BIOPHYSICS 2023; 62:131-142. [PMID: 36574034 DOI: 10.1007/s00411-022-01010-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 12/10/2022] [Indexed: 06/18/2023]
Abstract
Studies of radiobiological effects in murine rodents exposed to internal radiation in the wild or in laboratory experiments require dosimetric support. The main problem of bone marrow (BM) dosimetry for bone-seeking β-emitters is dosimetric modeling, because the bone is a heterogeneous structure with complex microarchitecture. To date, there are several approaches to calculating the absorbed dose in BM, which mostly use rough geometric approximations. Recently, in the framework of studies of people exposed to 90Sr in the Urals, a new approach (SPSD) has been developed. The aim of the current study was to test for the first time the possibility of extension of the SPSD approach elaborated for humans to mice. For this, computational phantoms of femur bones of laboratory animals (C57BL/6, C57BL/6 J, BALB/c, BALB/cJ) aged 5-8 weeks (growing) and > 8 weeks (adults) were created. The dose factors DFSr-90(BM ← TBV + CBV) to convert the Sr isotope activity concentration in a bone tissue into units of dose rate absorbed in the bone marrow were 1.75 ± 0.42 and 2.57 ± 0.93 μGy day-1 per Bq g-1 for growing and adult animals, respectively, while corresponding values for DFSr-89(BM ← TBV + CBV) were 1.08 ± 0.27 and 1.66 ± 0.67 μGy day-1 per Bq g-1, respectively. These results are about 2.5 times lower than skeleton-average DFs calculated assuming homogenous bone, where source and target coincide. The results of the present study demonstrate the possibility of application of the SPSD approach elaborated for humans to non-human mammals. It is concluded that the study demonstrates the feasibility and appropriateness of application of the SPSD approach elaborated for humans to non-human mammals. This approach opens up new prospects for studying the radiobiological consequences of red bone marrow exposure for both laboratory and wildlife mammals.
Collapse
Affiliation(s)
- Elena Shishkina
- Chelyabinsk State University, 129 Bratiev Kashirinykh Str., 454001, Chelyabinsk, Russia.
- Urals Research Center for Radiation Medicine, 68A, Vorovsky Str., 454124, Chelyabinsk, Russia.
| | - Alina Shuiskaya
- Chelyabinsk State University, 129 Bratiev Kashirinykh Str., 454001, Chelyabinsk, Russia
| | - Pavel Sharagin
- Urals Research Center for Radiation Medicine, 68A, Vorovsky Str., 454124, Chelyabinsk, Russia
| |
Collapse
|
2
|
Modeling a 3-D multiscale blood-flow and heat-transfer framework for realistic vascular systems. Sci Rep 2022; 12:14610. [PMID: 36028657 PMCID: PMC9418225 DOI: 10.1038/s41598-022-18831-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 08/22/2022] [Indexed: 11/20/2022] Open
Abstract
Modeling of biological domains and simulation of biophysical processes occurring in them can help inform medical procedures. However, when considering complex domains such as large regions of the human body, the complexities of blood vessel branching and variation of blood vessel dimensions present a major modeling challenge. Here, we present a Voxelized Multi-Physics Simulation (VoM-PhyS) framework to simulate coupled heat transfer and fluid flow using a multi-scale voxel mesh on a biological domain obtained. In this framework, flow in larger blood vessels is modeled using the Hagen–Poiseuille equation for a one-dimensional flow coupled with a three-dimensional two-compartment porous media model for capillary circulation in tissue. The Dirac distribution function is used as Sphere of Influence (SoI) parameter to couple the one-dimensional and three-dimensional flow. This blood flow system is coupled with a heat transfer solver to provide a complete thermo-physiological simulation. The framework is demonstrated on a frog tongue and further analysis is conducted to study the effect of convective heat exchange between blood vessels and tissue, and the effect of SoI on simulation results.
Collapse
|
3
|
Martinčík J, Čechák T, Urban T, Tamášová J, Siková L, Jakubcová I, Balogová Z. COMPARISON OF TWO TYPES EYE LENS DOSEMETERS USED IN INTERVENTIONAL CARDIOLOGY AND RADIOLOGY. RADIATION PROTECTION DOSIMETRY 2022; 198:580-585. [PMID: 36005993 DOI: 10.1093/rpd/ncac101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The aim of this contribution is to provide an overview of comparison of two types of eye lens dosemeter systems. The comparison was performed at the Department of Intravenous Cardiology using patient and physician phantoms and supplemented by dose simulation using the Monte Carlo method. The tests were performed in several specific geometries and in addition to eye lens dosemeters the value of a personal dosemeter located at the reference point was also monitored. The value of Hp(3) and Hp(10) was monitored. It is clear from the results that film dosemeters achieve more correct results in most cases. It is probably due to a better correction for the angle of exposure. This assumption must be verified by more detailed measurements in laboratory conditions.
Collapse
Affiliation(s)
- Jiří Martinčík
- Department of Dosimetry and Application of Ionizing Radiation, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 115 19, Prague, Czech Republic
| | - Tomáš Čechák
- Department of Dosimetry and Application of Ionizing Radiation, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 115 19, Prague, Czech Republic
| | - Tomáš Urban
- Department of Dosimetry and Application of Ionizing Radiation, Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Břehová 7, 115 19, Prague, Czech Republic
| | - Jana Tamášová
- Department of Radiation Protection, Nemocnice Na Homolce, Roentgenova 37/2, 150 30, Prague, Czech Republic
| | - Lenka Siková
- Department of Radiation Protection, Nemocnice Na Homolce, Roentgenova 37/2, 150 30, Prague, Czech Republic
| | - Iva Jakubcová
- Department of Radiation Protection, Nemocnice Na Homolce, Roentgenova 37/2, 150 30, Prague, Czech Republic
| | - Zdenka Balogová
- Department of Radiation Protection, Nemocnice Na Homolce, Roentgenova 37/2, 150 30, Prague, Czech Republic
| |
Collapse
|
4
|
Tillery H, Moore M, Gallagher KJ, Taddei PJ, Leuro E, Argento DC, Moffitt GB, Kranz M, Carey M, Heymsfield S, Newhauser WD. Personalized 3D-printed anthropomorphic whole-body phantom irradiated by protons, photons, and neutrons. Biomed Phys Eng Express 2022; 8. [PMID: 35045408 DOI: 10.1088/2057-1976/ac4d04] [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: 10/24/2021] [Accepted: 01/19/2022] [Indexed: 11/12/2022]
Abstract
The objective of this study was to confirm the feasibility of three-dimensionally-printed (3D-printed), personalized whole-body anthropomorphic phantoms for radiation dose measurements in a variety of charged and uncharged particle radiation fields. We 3D-printed a personalized whole-body phantom of an adult female with a height of 154.8 cm, mass of 90.7 kg, and body mass index of 37.8 kg/m2. The phantom comprised of a hollow plastic shell filled with water and included a watertight access conduit for positioning dosimeters. It is compatible with a wide variety of radiation dosimeters, including ionization chambers that are suitable for uncharged and charged particles. Its mass was 6.8 kg empty and 98 kg when filled with water. Watertightness and mechanical robustness were confirmed after multiple experiments and transportations between institutions. The phantom was irradiated to the cranium with therapeutic beams of 170-MeV protons, 6-MV photons, and fast neutrons. Radiation absorbed dose was measured from the cranium to the pelvis along the longitudinal central axis of the phantom. The dose measurements were made using established dosimetry protocols and well-characterized instruments. For the therapeutic environments considered in this study, stray radiation from intracranial treatment beams was the lowest for proton therapy, intermediate for photon therapy, and highest for neutron therapy. An illustrative example set of measurements at the location of the thyroid for a square field of 5.3 cm per side resulted in 0.09, 0.59, and 1.93 cGy/Gy from proton, photon, and neutron beams, respectively. In this study, we found that 3D-printed personalized phantoms are feasible, inherently reproducible, and well-suited for therapeutic radiation measurements. The measurement methodologies we developed enabled the direct comparison of radiation exposures from neutron, proton, and photon beam irradiations.
Collapse
Affiliation(s)
- Hunter Tillery
- Radiation Medicine, Oregon Health & Science University, 3181 S.W. Sam Jackson Park Road, KPV4, Portland, Oregon, 97239-3098, UNITED STATES
| | - Meagan Moore
- Louisiana State University, 439-B Nicholson Hall, Tower Dr., Baton Rouge, Louisiana, 70803-4001, UNITED STATES
| | - Kyle Joseph Gallagher
- Radiation Medicine, Oregon Health & Science University, 3181 S.W. Sam Jackson Park Road, KPV4, Portland, Oregon, 97239-3098, UNITED STATES
| | - Phillip J Taddei
- Department of Radiation Oncology, Mayo Clinic, 200 First St. SW, Rochester, Minnesota, 55905, UNITED STATES
| | - Eric Leuro
- Seattle Cancer Care Alliance, 1570 N 115th St, Seattle, Washington, 98133, UNITED STATES
| | - David C Argento
- Radiation Oncology, University of Washington School of Medicine, 1959 NE Pacific St, Seattle, Washington, 98195, UNITED STATES
| | - Gregory B Moffitt
- Radiation Oncology, University of Washington School of Medicine, 1959 NE Pacific St, Seattle, Washington, 98195, UNITED STATES
| | - Marissa Kranz
- University of Washington School of Medicine, 1959 NE Pacific St, Seattle, Washington, 98195, UNITED STATES
| | - Margaret Carey
- Louisiana State University, 439-B Nicholson Hall, Tower Dr., Baton Rouge, Louisiana, 70803-4001, UNITED STATES
| | - Steven Heymsfield
- Louisiana State University, 439-B Nicholson Hall, Tower Dr., Baton Rouge, Louisiana, 70803-4001, UNITED STATES
| | - Wayne David Newhauser
- Louisiana State University, 439-B Nicholson Hall, Tower Dr., Baton Rouge, Louisiana, 70803-4001, UNITED STATES
| |
Collapse
|
5
|
Halloran A, Newhauser W, Chu C, Donahue W. Personalized 3D-printed anthropomorphic phantoms for dosimetry in charged particle fields. Phys Med Biol 2021; 66. [PMID: 34654002 DOI: 10.1088/1361-6560/ac3047] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 10/15/2021] [Indexed: 11/11/2022]
Abstract
Anthropomorphic phantoms used for radiation dose measurements are designed to mimic human tissue in shape, size, and tissue composition. Reference phantoms are widely available and are sufficiently similar to many, but not all, human subjects. 3D printing has the potential to overcome some of these shortcomings by enabling rapid fabrication of personalized phantoms for individual human subjects based on radiographic imaging data.Objective. The objective of this study was to test the efficacy of personalized 3D printed phantoms for charged particle therapy. To accomplish this, we measured dose distributions from 6 to 20 MeV electron beams, incident on printed and molded slices of phantoms.Approach. Specifically, we determined the radiological properties of 3D printed phantoms, including beam penetration range. Additionally, we designed and printed a personalized head phantom to compare results obtained with a commercial, reference head phantom for quality assurance of therapeutic electron beam dose calculations.Main Results. For regions of soft tissue, gamma index analyses revealed a 3D printed slice was able to adequately model the same electron beam penetration ranges as the molded reference slice. The printed, personalized phantom provided superior dosimetric accuracy compared to the molded reference phantom for electron beam dose calculations at all electron beam energies. However, current limitations in the ability to print high-density structures, such as bone, limited pass rates of 60% or better at 16 and 20 MeV electron beam energies.Significance. This study showed that creating personalized phantoms using 3D printing techniques is a feasible way to substantially improve the accuracy of dose measurements of therapeutic electron beams, but further improvements in printing techniques are necessary in order to increase the printable density in phantoms.
Collapse
Affiliation(s)
- Andrew Halloran
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana, United States of America
| | - Wayne Newhauser
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana, United States of America.,Department of Radiation Physics, Mary Bird Perkins Cancer Center, Baton Rouge, Louisiana, United States of America
| | - Connel Chu
- Department of Radiation Physics, Mary Bird Perkins Cancer Center, Baton Rouge, Louisiana, United States of America
| | - William Donahue
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, Louisiana, United States of America
| |
Collapse
|
6
|
Fum WKS, Wong JHD, Tan LK. Monte Carlo-based patient internal dosimetry in fluoroscopy-guided interventional procedures: A review. Phys Med 2021; 84:228-240. [PMID: 33849785 DOI: 10.1016/j.ejmp.2021.03.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 02/18/2021] [Accepted: 03/03/2021] [Indexed: 11/27/2022] Open
Abstract
PURPOSE This systematic review aims to understand the dose estimation approaches and their major challenges. Specifically, we focused on state-of-the-art Monte Carlo (MC) methods in fluoroscopy-guided interventional procedures. METHODS All relevant studies were identified through keyword searches in electronic databases from inception until September 2020. The searched publications were reviewed, categorised and analysed based on their respective methodology. RESULTS Hundred and one publications were identified which utilised existing MC-based applications/programs or customised MC simulations. Two outstanding challenges were identified that contribute to uncertainties in the virtual simulation reconstruction. The first challenge involves the use of anatomical models to represent individuals. Currently, phantom libraries best balance the needs of clinical practicality with those of specificity. However, mismatches of anatomical variations including body size and organ shape can create significant discrepancies in dose estimations. The second challenge is that the exact positioning of the patient relative to the beam is generally unknown. Most dose prediction models assume the patient is located centrally on the examination couch, which can lead to significant errors. CONCLUSION The continuing rise of computing power suggests a near future where MC methods become practical for routine clinical dosimetry. Dynamic, deformable phantoms help to improve patient specificity, but at present are only limited to adjustment of gross body volume. Dynamic internal organ displacement or reshaping is likely the next logical frontier. Image-based alignment is probably the most promising solution to enable this, but it must be automated to be clinically practical.
Collapse
Affiliation(s)
- Wilbur K S Fum
- Department of Biomedical Imaging, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia; Division of Radiological Sciences, Singapore General Hospital, Outram Rd, Singapore 169608, Singapore.
| | - Jeannie Hsiu Ding Wong
- Department of Biomedical Imaging, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia.
| | - Li Kuo Tan
- Department of Biomedical Imaging, Faculty of Medicine, University of Malaya, Kuala Lumpur 50603, Malaysia.
| |
Collapse
|
7
|
Shishkina EA, Timofeev YS, Volchkova AY, Sharagin PA, Zalyapin VI, Degteva MO, Smith MA, Napier BA. Trabecula: A Random Generator of Computational Phantoms for Bone Marrow Dosimetry. HEALTH PHYSICS 2020; 118:53-59. [PMID: 31764420 DOI: 10.1097/hp.0000000000001127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
This study was motivated by the efforts to evaluate radiation risk for leukemia incidence in the Techa River cohort, where the main bone marrow dose contributors were Sr (bone-seeking beta emitters). Energy deposition in bone marrow targets was evaluated by simulating radiation particle transport using computational phantoms. The present paper describes the computer program Trabecula implementing an algorithm for parametric generation of computational phantoms, which serve as the basis for calculating bone marrow doses. Trabecula is a user-friendly tool that automatically converts analytical models into voxelized representations that are directly compatible as input to Monte Carlo N Particle code.
Collapse
Affiliation(s)
| | - Y S Timofeev
- Urals Research Centre for Radiation Medicine (URCRM), Chelyabinsk, Russia
| | - A Y Volchkova
- Urals Research Centre for Radiation Medicine (URCRM), Chelyabinsk, Russia
| | - P A Sharagin
- Urals Research Centre for Radiation Medicine (URCRM), Chelyabinsk, Russia
| | - V I Zalyapin
- Southern Urals State University (SUSU), Chelyabinsk, Russia
| | - M O Degteva
- Urals Research Centre for Radiation Medicine (URCRM), Chelyabinsk, Russia
| | - M A Smith
- Pacific Northwest National Laboratory, Richland, WA
| | - B A Napier
- Pacific Northwest National Laboratory, Richland, WA
| |
Collapse
|
8
|
López MA, Nogueira P, Vrba T, Tanner RJ, Rühm W, Tolmachev SY. Measurements and Monte Carlo Simulations of 241Am Activities in Three Skull Phantoms: EURADOS-USTUR Collaboration. HEALTH PHYSICS 2019; 117:193-201. [PMID: 31022011 DOI: 10.1097/hp.0000000000001080] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
An international intercomparison was organized by Working Group 7, Internal Dosimetry, of the European Radiation Dosimetry Group in collaboration with Working Group 6, Computational Dosimetry, for measurement and Monte Carlo simulation of Am in three skull phantoms. The main objectives of this combined exercise were (1) comparison of the results of counting efficiency in fixed positions over each head phantom using different germanium detector systems, (2) calculation of the activity of Am in the skulls, (3) comparison of Monte Carlo simulations with measurements (spectrum and counting efficiency), and (4) comparison of phantom performance. This initiative collected knowledge on equipment, detector arrangements, calibration procedures, and phantoms used around the world for in vivo monitoring of Am in exposed persons, as well as on the Monte Carlo skills and tools of participants. Three skull phantoms (BfS, USTUR, and CSR phantoms) were transported from Europe (10 laboratories) to North America (United States and Canada). The BfS skull was fabricated with real human bone artificially labeled with Am. The USTUR skull phantom was made from the US Transuranium and Uranium Registries whole-body donor (case 0102) who was contaminated due to an occupational intake of Am; one-half of the skull corresponds to real contaminated bone, the other half is real human bone from a noncontaminated person. Finally, the CSR phantom was fabricated as a simple hemisphere of equivalent bone and tissue material. The three phantoms differ in weight, size, and shape, which made them suitable for an efficiency study. Based on their own skull calibration, the participants calculated the activity in the three European Radiation Dosimetry Group head phantoms. The Monte Carlo intercomparison was organized in parallel with the measurement exercise using the voxel representations of the three physical phantoms; there were 16 participants. Three tasks were identified with increasing difficulty: (1) Monte Carlo simulation of the simple CSR hemisphere and the Helmholz Zentrum München high-purity germanium detector for calculating the counting efficiency for the 59.54 keV photons of Am, in established measurement geometry; (2) Monte Carlo simulation of particular measurement geometries using the BfS and USTUR voxel phantoms and the Helmholz Zentrum München high-purity germanium detector detector; and (3) application of Monte Carlo methodology to calculate the calibration factor of each participant for the detector system and counting geometry (single or multidetector arrangement) to be used for monitoring a person in each in vivo facility, using complex skull phantoms. The results of both exercises resulted in the conclusion that none of the three available head phantoms is appropriate as a reference phantom for the calibration of germanium detection systems for measuring Am in exposed adult persons. The main reasons for this are: (1) lack of homogeneous activity distribution in the bone material, or (2) inadequate shape/size for simulating an adult skull. Good agreement was found between Monte Carlo results and measurements, which supports Monte Carlo calibration of body counters as an alternative method when appropriate physical phantoms are not available and the detector and source are well known.
Collapse
Affiliation(s)
- María Antonia López
- CIEMAT, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, Radiation Dosimetry Unit, Madrid, Spain
| | | | - Tomas Vrba
- Czech Technical University in Prague, Czech Republic
| | | | - Werner Rühm
- HMGU, Helmholtz ZentrumMünchen, National Research Center for Environmental Health, Institute of Radiation Protection, Neuherberg, Germany
| | - Sergei Y Tolmachev
- USTUR, US Transuranium and Uranium Registries, College of Pharmacy, Washington State University
| |
Collapse
|
9
|
Yeom YS, Han H, Choi C, Nguyen TT, Shin B, Lee C, Kim CH. Posture-dependent dose coefficients of mesh-type ICRP reference computational phantoms for photon external exposures. ACTA ACUST UNITED AC 2019; 64:075018. [DOI: 10.1088/1361-6560/ab0917] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|