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Garate-Soraluze E, Marco-Sanz J, Serrano-Mendioroz I, Marrodán L, Fernandez-Rubio L, Labiano S, Rodríguez-Ruiz ME. Radiotherapy protocols for mouse cancer model. Methods Cell Biol 2024; 185:99-113. [PMID: 38556454 DOI: 10.1016/bs.mcb.2024.02.007] [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] [Indexed: 04/02/2024]
Abstract
Radiotherapy is a crucial treatment modality for cancer patients, with approximately 60% of individuals undergoing ionizing radiation as part of their disease management. In recent years, there has been a growing trend toward minimizing irradiation fields through the use of image-guided dosimetry and innovative technologies. These advancements allow for selective irradiation, delivering higher local doses while reducing the number of treatment sessions. Consequently, computer-assisted methods have significantly enhanced the effectiveness of radiotherapy in the curative and palliative treatment of various cancers. Although radiation therapy alone can effectively achieve local control in some cancer types, it may not be sufficient for others. As a result, further preclinical research is necessary to explore novel approaches including new schedules of radiotherapy treatments. Unfortunately, there is a concerning lack of correlation between clinical outcomes and experiments conducted on mouse models. We hypothesize that this disparity arises from the differences in irradiation strategies employed in preclinical studies compared to those used in clinical practice, which ultimately affects the translatability of findings to patients. In this study, we present two comprehensive radiotherapy protocols for the treatment of orthotopic melanoma and glioblastoma tumors. These protocols utilize a small animal radiation research platform, which is an ideal radiation device for delivering localized and precise X-ray doses to the tumor mass. By employing these platforms, we aim to limit the side effects associated with irradiating healthy surrounding tissues. Our detailed protocols offer a valuable framework for conducting preclinical studies that closely mimic clinical radiotherapy techniques, bridging the gap between experimental results and patient outcomes.
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Affiliation(s)
- Eneko Garate-Soraluze
- Program of Immunology and Immunotherapy, Center for Applied Medical Research (CIMA), Pamplona, Spain
| | - Javier Marco-Sanz
- Program of Solid Tumors, Center for Applied Medical Research (CIMA), Pamplona, Spain; Department of Pediatrics, University of Navarra Clinic, Pamplona, Spain; Navarra Institute for Health Research (IDISNA), Pamplona, Spain
| | - Irantzu Serrano-Mendioroz
- Program of Immunology and Immunotherapy, Center for Applied Medical Research (CIMA), Pamplona, Spain
| | - Lucía Marrodán
- Program of Solid Tumors, Center for Applied Medical Research (CIMA), Pamplona, Spain; Navarra Institute for Health Research (IDISNA), Pamplona, Spain
| | - Leticia Fernandez-Rubio
- Program of Immunology and Immunotherapy, Center for Applied Medical Research (CIMA), Pamplona, Spain
| | - Sara Labiano
- Program of Solid Tumors, Center for Applied Medical Research (CIMA), Pamplona, Spain; Department of Pediatrics, University of Navarra Clinic, Pamplona, Spain; Navarra Institute for Health Research (IDISNA), Pamplona, Spain
| | - María E Rodríguez-Ruiz
- Program of Immunology and Immunotherapy, Center for Applied Medical Research (CIMA), Pamplona, Spain; Navarra Institute for Health Research (IDISNA), Pamplona, Spain; Department of Radiation Oncology, University of Navarra Clinic, Pamplona, Spain; Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain.
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More efficient induction of genotoxicity by high-LET Fe-particle radiation than low-LET X-ray radiation at low doses. RADIATION MEDICINE AND PROTECTION 2022. [DOI: 10.1016/j.radmp.2022.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
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Rezaeifar B, Wolfs CJA, Lieuwes NG, Biemans R, Reniers B, Dubois LJ, Verhaegen F. A deep learning and Monte Carlo based framework for bioluminescence imaging center of mass-guided glioblastoma targeting. Phys Med Biol 2022; 67. [DOI: 10.1088/1361-6560/ac79f8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 06/17/2022] [Indexed: 11/11/2022]
Abstract
Abstract
Objective. Bioluminescence imaging (BLI) is a valuable tool for non-invasive monitoring of glioblastoma multiforme (GBM) tumor-bearing small animals without incurring x-ray radiation burden. However, the use of this imaging modality is limited due to photon scattering and lack of spatial information. Attempts at reconstructing bioluminescence tomography (BLT) using mathematical models of light propagation show limited progress. Approach. This paper employed a different approach by using a deep convolutional neural network (CNN) to predict the tumor’s center of mass (CoM). Transfer-learning with a sizeable artificial database is employed to facilitate the training process for, the much smaller, target database including Monte Carlo (MC) simulations of real orthotopic glioblastoma models. Predicted CoM was then used to estimate a BLI-based planning target volume (bPTV), by using the CoM as the center of a sphere, encompassing the tumor. The volume of the encompassing target sphere was estimated based on the total number of photons reaching the skin surface. Main results. Results show sub-millimeter accuracy for CoM prediction with a median error of 0.59 mm. The proposed method also provides promising performance for BLI-based tumor targeting with on average 94% of the tumor inside the bPTV while keeping the average healthy tissue coverage below 10%. Significance. This work introduced a framework for developing and using a CNN for targeted radiation studies for GBM based on BLI. The framework will enable biologists to use BLI as their main image-guidance tool to target GBM tumors in rat models, avoiding delivery of high x-ray imaging dose to the animals.
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Extraterrestrial Gynecology: Could Spaceflight Increase the Risk of Developing Cancer in Female Astronauts? An Updated Review. Int J Mol Sci 2022; 23:ijms23137465. [PMID: 35806469 PMCID: PMC9267413 DOI: 10.3390/ijms23137465] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 07/03/2022] [Accepted: 07/04/2022] [Indexed: 02/04/2023] Open
Abstract
Outer space is an extremely hostile environment for human life, with ionizing radiation from galactic cosmic rays and microgravity posing the most significant hazards to the health of astronauts. Spaceflight has also been shown to have an impact on established cancer hallmarks, possibly increasing carcinogenic risk. Terrestrially, women have a higher incidence of radiation-induced cancers, largely driven by lung, thyroid, breast, and ovarian cancers, and therefore, historically, they have been permitted to spend significantly less time in space than men. In the present review, we focus on the effects of microgravity and radiation on the female reproductive system, particularly gynecological cancer. The aim is to provide a summary of the research that has been carried out related to the risk of gynecological cancer, highlighting what further studies are needed to pave the way for safer exploration class missions, as well as postflight screening and management of women astronauts following long-duration spaceflight.
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Brown KH, Ghita M, Dubois LJ, de Ruysscher D, Prise KM, Verhaegen F, Butterworth KT. A scoping review of small animal image-guided radiotherapy research: Advances, impact and future opportunities in translational radiobiology. Clin Transl Radiat Oncol 2022; 34:112-119. [PMID: 35496817 PMCID: PMC9046563 DOI: 10.1016/j.ctro.2022.04.004] [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: 03/25/2022] [Accepted: 04/04/2022] [Indexed: 11/18/2022] Open
Abstract
Background and purpose To provide a scoping review of published studies using small animal irradiators and highlight the progress in preclinical radiotherapy (RT) studies enabled by these platforms since their development and commercialization in 2007. Materials and methods PubMed searches and manufacturer records were used to identify 907 studies that were screened with 359 small animal RT studies included in the analyses. These articles were classified as biology or physics contributions and into subgroups based on research aims, experimental models and other parameters to identify trends in the preclinical RT research landscape. Results From 2007 to 2021, most published articles were biology contributions (62%) whilst physics contributions accounted for 38% of the publications. The main research areas of physics articles were in dosimetry and calibration (24%), treatment planning and simulation (22%), and imaging (22%) and the studies predominantly used phantoms (41%) or in vivo models (34%). The majority of biology contributions were tumor studies (69%) with brain being the most commonly investigated site. The most frequently investigated areas of tumor biology were evaluating radiosensitizers (33%), model development (30%) and imaging (21%) with cell-line derived xenografts the most common model (82%). 31% of studies focused on normal tissue radiobiology and the lung was the most investigated site. Conclusions This study captures the trends in preclinical RT research using small animal irradiators from 2007 to 2021. Our data show the increased uptake and outputs from preclinical RT studies in important areas of biology and physics research that could inform translation to clinical trials.
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Affiliation(s)
- Kathryn H. Brown
- Patrick G. Johnston Centre for Cancer Research, Queen’s University Belfast, Belfast, United Kingdom
- Corresponding author at: Patrick G. Johnston Centre for Cancer Research, Queen’s University Belfast, 97 Lisburn Road, Belfast BT9 7AE, United Kingdom.
| | - Mihaela Ghita
- Patrick G. Johnston Centre for Cancer Research, Queen’s University Belfast, Belfast, United Kingdom
| | - Ludwig J. Dubois
- The M-Lab, Department of Precision Medicine, GROW – School for Oncology, Maastricht University, Maastricht, The Netherlands
| | - Dirk de Ruysscher
- Department of Radiation Oncology (MAASTRO), GROW – School for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Kevin M. Prise
- Patrick G. Johnston Centre for Cancer Research, Queen’s University Belfast, Belfast, United Kingdom
| | - Frank Verhaegen
- Department of Radiation Oncology (MAASTRO), GROW – School for Oncology and Developmental Biology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Karl T. Butterworth
- Patrick G. Johnston Centre for Cancer Research, Queen’s University Belfast, Belfast, United Kingdom
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6
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Lappas G, Staut N, Lieuwes NG, Biemans R, Wolfs CJ, van Hoof SJ, Dubois LJ, Verhaegen F. Inter-observer variability of organ contouring for preclinical studies with cone beam Computed Tomography imaging. Phys Imaging Radiat Oncol 2022; 21:11-17. [PMID: 35111981 PMCID: PMC8790504 DOI: 10.1016/j.phro.2022.01.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 01/05/2022] [Accepted: 01/12/2022] [Indexed: 12/28/2022] Open
Abstract
Background and purpose In preclinical radiation studies, there is great interest in quantifying the radiation response of healthy tissues. Manual contouring has significant impact on the treatment-planning because of variation introduced by human interpretation. This results in inconsistencies when assessing normal tissue volumes. Evaluation of these discrepancies can provide a better understanding on the limitations of the current preclinical radiation workflow. In the present work, interobserver variability (IOV) in manual contouring of rodent normal tissues on cone-beam Computed Tomography, in head and thorax regions was evaluated. Materials and methods Two animal technicians performed manually (assisted) contouring of normal tissues located within the thorax and head regions of rodents, 20 cases per body site. Mean surface distance (MSD), displacement of center of mass (ΔCoM), DICE similarity coefficient (DSC) and the 95th percentile Hausdorff distance (HD95) were calculated between the contours of the two observers to evaluate the IOV. Results For the thorax organs, right lung had the lowest IOV (ΔCoM: 0.08 ± 0.04 mm, DSC: 0.96 ± 0.01, MSD:0.07 ± 0.01 mm, HD95:0.20 ± 0.03 mm) while spinal cord, the highest IOV (ΔCoM:0.5 ± 0.3 mm, DSC:0.81 ± 0.05, MSD:0.14 ± 0.03 mm, HD95:0.8 ± 0.2 mm). Regarding head organs, right eye demonstrated the lowest IOV (ΔCoM:0.12 ± 0.08 mm, DSC: 0.93 ± 0.02, MSD: 0.15 ± 0.04 mm, HD95: 0.29 ± 0.07 mm) while complete brain, the highest IOV (ΔCoM: 0.2 ± 0.1 mm, DSC: 0.94 ± 0.02, MSD: 0.3 ± 0.1 mm, HD95: 0.5 ± 0.1 mm). Conclusions Our findings reveal small IOV, within the sub-mm range, for thorax and head normal tissues in rodents. The set of contours can serve as a basis for developing an automated delineation method for e.g., treatment planning.
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Affiliation(s)
- Georgios Lappas
- Department of Radiation Oncology (MAASTRO), GROW – School for Oncology and Developmental Biology, Maastricht University Medical Centre+, Maastricht, the Netherlands
| | - Nick Staut
- Department of Radiation Oncology (MAASTRO), GROW – School for Oncology and Developmental Biology, Maastricht University Medical Centre+, Maastricht, the Netherlands
- The M-Lab, Department of Precision Medicine, GROW – School for Oncology and Developmental Biology, Maastricht University, Maastricht, the Netherlands
| | | | - Rianne Biemans
- SmART Scientific Solutions BV, Maastricht, the Netherlands
| | - Cecile J.A. Wolfs
- Department of Radiation Oncology (MAASTRO), GROW – School for Oncology and Developmental Biology, Maastricht University Medical Centre+, Maastricht, the Netherlands
| | - Stefan J. van Hoof
- The M-Lab, Department of Precision Medicine, GROW – School for Oncology and Developmental Biology, Maastricht University, Maastricht, the Netherlands
| | | | - Frank Verhaegen
- Department of Radiation Oncology (MAASTRO), GROW – School for Oncology and Developmental Biology, Maastricht University Medical Centre+, Maastricht, the Netherlands
- The M-Lab, Department of Precision Medicine, GROW – School for Oncology and Developmental Biology, Maastricht University, Maastricht, the Netherlands
- Corresponding author at: Department of Radiation Oncology (MAASTRO), GROW – School for Oncology and Developmental Biology, Maastricht University Medical Centre+, Maastricht, the Netherlands.
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7
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Ravichandran A, Clegg J, Adams MN, Hampson M, Fielding A, Bray LJ. 3D Breast Tumor Models for Radiobiology Applications. Cancers (Basel) 2021; 13:5714. [PMID: 34830869 PMCID: PMC8616164 DOI: 10.3390/cancers13225714] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 10/28/2021] [Accepted: 11/07/2021] [Indexed: 12/17/2022] Open
Abstract
Breast cancer is a leading cause of cancer-associated death in women. The clinical management of breast cancers is normally carried out using a combination of chemotherapy, surgery and radiation therapy. The majority of research investigating breast cancer therapy until now has mainly utilized two-dimensional (2D) in vitro cultures or murine models of disease. However, there has been significant uptake of three-dimensional (3D) in vitro models by cancer researchers over the past decade, highlighting a complimentary model for studies of radiotherapy, especially in conjunction with chemotherapy. In this review, we underline the effects of radiation therapy on normal and malignant breast cells and tissues, and explore the emerging opportunities that pre-clinical 3D models offer in improving our understanding of this treatment modality.
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Affiliation(s)
- Akhilandeshwari Ravichandran
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; (A.R.); (J.C.); (M.H.)
- ARC Training Centre for Cell and Tissue Engineering Technologies, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia;
| | - Julien Clegg
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; (A.R.); (J.C.); (M.H.)
- ARC Training Centre for Cell and Tissue Engineering Technologies, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia;
| | - Mark N. Adams
- ARC Training Centre for Cell and Tissue Engineering Technologies, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia;
- School of Biomedical Sciences, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Madison Hampson
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; (A.R.); (J.C.); (M.H.)
| | - Andrew Fielding
- School of Chemistry and Physics, Queensland University of Technology, Brisbane, QLD 4000, Australia;
| | - Laura J. Bray
- School of Mechanical, Medical and Process Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia; (A.R.); (J.C.); (M.H.)
- ARC Training Centre for Cell and Tissue Engineering Technologies, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia;
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Tuieng RJ, Cartmell SH, Kirwan CC, Sherratt MJ. The Effects of Ionising and Non-Ionising Electromagnetic Radiation on Extracellular Matrix Proteins. Cells 2021; 10:3041. [PMID: 34831262 PMCID: PMC8616186 DOI: 10.3390/cells10113041] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/28/2021] [Accepted: 10/30/2021] [Indexed: 02/07/2023] Open
Abstract
Exposure to sub-lethal doses of ionising and non-ionising electromagnetic radiation can impact human health and well-being as a consequence of, for example, the side effects of radiotherapy (therapeutic X-ray exposure) and accelerated skin ageing (chronic exposure to ultraviolet radiation: UVR). Whilst attention has focused primarily on the interaction of electromagnetic radiation with cells and cellular components, radiation-induced damage to long-lived extracellular matrix (ECM) proteins has the potential to profoundly affect tissue structure, composition and function. This review focuses on the current understanding of the biological effects of ionising and non-ionising radiation on the ECM of breast stroma and skin dermis, respectively. Although there is some experimental evidence for radiation-induced damage to ECM proteins, compared with the well-characterised impact of radiation exposure on cell biology, the structural, functional, and ultimately clinical consequences of ECM irradiation remain poorly defined.
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Affiliation(s)
- Ren Jie Tuieng
- Division of Cell Matrix Biology & Regenerative Medicine, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, UK;
| | - Sarah H. Cartmell
- Department of Materials, School of Natural Sciences, Faculty of Science and Engineering and The Henry Royce Institute, Royce Hub Building, University of Manchester, Manchester M13 9PL, UK;
| | - Cliona C. Kirwan
- Division of Cancer Sciences and Manchester Breast Centre, Oglesby Cancer Research Building, Manchester Cancer Research Centre, School of Medical Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M20 4BX, UK;
| | - Michael J. Sherratt
- Division of Cell Matrix Biology & Regenerative Medicine and Manchester Breast Centre, Faculty of Biology, Medicine and Health, University of Manchester, Manchester M13 9PT, UK
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Sudha T, Rehman MU, Darwish NHE, Coskun MD, Satti JA, Davis PJ, Mousa SA. Nano-Targeting of Thyrointegrin αvβ3 Receptor in Solid Tumors and Impact on Radiosensitization. Radiat Res 2021; 196:375-385. [PMID: 34260732 DOI: 10.1667/rade-21-00031.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Accepted: 06/21/2021] [Indexed: 11/03/2022]
Abstract
Tetraiodothyroacetic acid is a ligand of thyrointegrin αvβ3, a protein that is highly expressed in various solid tumors and surrounding neovascular regions. Its nano derivative, Nano-diamino-tetrac (NDAT), has anticancer properties in preclinical models, enhances radiosensitivity, and inhibits cancer cell growth in vitro after X-ray irradiation. Using a novel experimental system developed to deliver accurate radiation dose to tumors under sterile conditions, this study establishes NDAT's radiosensitizing effect in SUIT-2 pancreatic cancer and H1299 non-small cell lung carcinoma xenografts in athymic mice for tumor-targeted radiation. In this work, low-melting-point Lipowitz alloy was used to shield normal organs and allow accurate tumor-targeted irradiation. Over a three-week period, mice with SUIT-2 xenografts received daily NDAT treatment at different doses (0, 1, 3, or 10 mg/kg body weight) and tumor-targeted irradiation (1 or 5 Gy). Validation was performed with a test dose of 30 Gy to mice bearing SUIT-2 xenografts and resulted in more than 80% reduction in tumor weight, compared to nonirradiated tumor weight. The results of this work showed that NDAT had a radiosensitizing effect in a dose-dependent manner in decreasing tumor growth and viability. An enhanced anticancer effect of NDAT (1 mg/kg body weight) was observed in mice with H1299 xenografts receiving 5 Gy tumor-targeted irradiation, indicated by decreased tumor weight and increased necrosis, compared to nonirradiated tumors. This technique demonstrated accurate tumor-targeted irradiation with new shielding methodology, and combined with thyrointegrin antagonist NDAT treatment, showed anticancer efficacy in pancreatic cancer and non-small cell lung carcinoma.
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Affiliation(s)
- Thangirala Sudha
- The Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, New York
| | - Mahboob Ur Rehman
- Department of Physics, University of Central Florida, Orlando, Florida
| | - Noureldien H E Darwish
- The Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, New York
- Hematology Unit, Clinical Pathology Department, Mansoura Faculty of Medicine, Mansoura University, Egypt
| | - Melis Debreli Coskun
- The Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, New York
| | | | - Paul J Davis
- The Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, New York
- Departments of Medicine, Albany Medical College, Albany, New York
| | - Shaker A Mousa
- The Pharmaceutical Research Institute, Albany College of Pharmacy and Health Sciences, Rensselaer, New York
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Deep Learning Based Automated Orthotopic Lung Tumor Segmentation in Whole-Body Mouse CT-Scans. Cancers (Basel) 2021; 13:cancers13184585. [PMID: 34572813 PMCID: PMC8471805 DOI: 10.3390/cancers13184585] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 09/03/2021] [Accepted: 09/08/2021] [Indexed: 11/17/2022] Open
Abstract
Lung cancer is the leading cause of cancer related deaths worldwide. The development of orthotopic mouse models of lung cancer, which recapitulates the disease more realistically compared to the widely used subcutaneous tumor models, is expected to critically aid the development of novel therapies to battle lung cancer or related comorbidities such as cachexia. However, follow-up of tumor take, tumor growth and detection of therapeutic effects is difficult, time consuming and requires a vast number of animals in orthotopic models. Here, we describe a solution for the fully automatic segmentation and quantification of orthotopic lung tumor volume and mass in whole-body mouse computed tomography (CT) scans. The goal is to drastically enhance the efficiency of the research process by replacing time-consuming manual procedures with fast, automated ones. A deep learning algorithm was trained on 60 unique manually delineated lung tumors and evaluated by four-fold cross validation. Quantitative performance metrics demonstrated high accuracy and robustness of the deep learning algorithm for automated tumor volume analyses (mean dice similarity coefficient of 0.80), and superior processing time (69 times faster) compared to manual segmentation. Moreover, manual delineations of the tumor volume by three independent annotators was sensitive to bias in human interpretation while the algorithm was less vulnerable to bias. In addition, we showed that besides longitudinal quantification of tumor development, the deep learning algorithm can also be used in parallel with the previously published method for muscle mass quantification and to optimize the experimental design reducing the number of animals needed in preclinical studies. In conclusion, we implemented a method for fast and highly accurate tumor quantification with minimal operator involvement in data analysis. This deep learning algorithm provides a helpful tool for the noninvasive detection and analysis of tumor take, tumor growth and therapeutic effects in mouse orthotopic lung cancer models.
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Hasan N, Sham NFR, Karim MKA, Fuad SBSA, Hasani NAH, Omar E, Ibahim MJ. Development of custom lead shield and strainer for targeted irradiation for mice in the gamma cell chamber. Sci Rep 2021; 11:14559. [PMID: 34267293 PMCID: PMC8282798 DOI: 10.1038/s41598-021-93964-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 07/05/2021] [Indexed: 11/09/2022] Open
Abstract
We presented a development of a custom lead shield and mouse strainer for targeted irradiation from the gamma-cell chamber. This study was divided into two parts i.e., to (i) fabricate the shield and strainer from a lead (Pb) and (ii) optimize the irradiation to the mice-bearing tumour model with 2 and 8 Gy absorbed doses. The lead shielding was fabricated into a cuboid shape with a canal on the top and a hole on the vertical side for the beam path. Respective deliveries doses of 28 and 75 Gy from gamma-cell were used to achieve 2 and 8 Gy absorbed doses at the tumour sites.
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Affiliation(s)
- Nurhaslina Hasan
- Faculty of Medicine, Universiti Teknologi MARA, 47200, Sungai Buloh, Selangor, Malaysia
- Faculty of Dentistry, Universiti Teknologi MARA, 47200, Sungai Buloh, Selangor, Malaysia
| | | | | | | | | | - Effat Omar
- Faculty of Medicine, Universiti Teknologi MARA, 47200, Sungai Buloh, Selangor, Malaysia
| | - Mohammad Johari Ibahim
- Faculty of Medicine, Universiti Teknologi MARA, 47200, Sungai Buloh, Selangor, Malaysia.
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Turner AC, Powers SA, Odom MR, Pak ES, Ashcraft KA, Koontz BF, Hannan JL. Impact of prostatic radiation therapy on bladder contractility and innervation. Neurourol Urodyn 2021; 40:1470-1478. [PMID: 34015163 DOI: 10.1002/nau.24705] [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: 04/20/2021] [Revised: 05/03/2021] [Accepted: 05/06/2021] [Indexed: 11/10/2022]
Abstract
AIMS To determine the effect of prostatic radiation therapy (RT) on bladder contractility and morphology, and axon, or neuron profiles within the detrusor and major pelvic ganglia (MPG) in male rats. METHODS Male Sprague-Dawley rats (8 weeks) received a single dose of prostatic RT (0 or 22 Gy). Bladders and MPG were collected 2- and 10-weeks post-RT. Detrusor contractile responses to carbachol and electrical field stimulation (EFS) were measured. Bladders were stained with Masson's trichrome, and antibodies for nonspecific neuronal marker, cholinergic nerve marker choline acetyltransferase (ChAT), and alpha-smooth muscle actin. MPG gene expression was assessed by quantitative polymerase chain reaction for ubiquitin carboxy-terminal hydrolase L1 (Uchl1) and Chat. RESULTS At 2 weeks post-RT, bladder smooth muscle, detrusor cholinergic axon profiles, and MPG Chat gene expression were increased (p < .05), while carbachol and EFS-mediated contractions were decreased (p < .05). In contrast, at 10 weeks post-RT, nerve-mediated contractions were increased compared with control (p < .05), while bladder smooth muscle, detrusor cholinergic axon profiles, MPG Chat expression, and carbachol contractions had normalized. At both 2- and 10-weeks post-RT, there was no change in detrusor nonspecific axon profiles and MPG Uchl1 expression. CONCLUSION In a rat model, RT of the prostate and MPG was associated with early changes in MPG Chat gene expression, and bladder cholinergic axon profiles and smooth muscle content which resolved over time. After RT recovery, bladder contractility decreased early and increased by 10 weeks. Long-term changes to the MPG and increased bladder cholinergic axons may contribute to RT-induced bladder dysfunction in prostate cancer survivors.
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Affiliation(s)
- Alexander C Turner
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA
| | - Shelby A Powers
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA.,Department of Psychiatry & Behavioral Sciences, Duke University, Durham, North Carolina, USA
| | - Michael R Odom
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA.,Division of Urology, Department of Surgery, Duke University, Durham, North Carolina, USA
| | - Elena S Pak
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA
| | - Kathleen A Ashcraft
- Department of Radiation Oncology, Duke University, Durham, North Carolina, USA
| | - Bridget F Koontz
- Department of Radiation Oncology, Duke University, Durham, North Carolina, USA
| | - Johanna L Hannan
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA
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Vatner R, James CD, Sathiaseelan V, Bondra KM, Kalapurakal JA, Houghton PJ. Radiation therapy and molecular-targeted agents in preclinical testing for immunotherapy, brain tumors, and sarcomas: Opportunities and challenges. Pediatr Blood Cancer 2021; 68 Suppl 2:e28439. [PMID: 32827353 DOI: 10.1002/pbc.28439] [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: 01/12/2020] [Revised: 04/24/2020] [Accepted: 05/07/2020] [Indexed: 01/07/2023]
Abstract
Despite radiation therapy (RT) being an integral part of the treatment of most pediatric cancers and the recent discovery of novel molecular-targeted agents (MTAs) in this era of precision medicine with the potential to improve the therapeutic ratio of modern chemoradiotherapy regimens, there are only a few preclinical trials being conducted to discover novel radiosensitizers and radioprotectors. This has resulted in a paucity of translational clinical trials combining RT and novel MTAs. This report describes the opportunities and challenges of investigating RT together with MTAs in preclinical testing for immunotherapy, brain tumors, and sarcomas in pediatric oncology. We discuss the need for improving the collaboration between radiation oncologists, biologists, and physicists to improve the reliability, reproducibility, and translational potential of RT-based preclinical research. Current translational clinical trials using RT and MTAs for immunotherapy, brain tumors, and sarcomas are described. The technologic advances in experimental RT, availability of novel experimental tumor models, advances in immunology and tumor biology, and the discovery of novel MTAs together hold considerable promise for good quality preclinical and clinical multimodality research to improve the current rates of survival and toxicity in children afflicted with cancer.
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Affiliation(s)
- Ralph Vatner
- Radiation Oncology, University of Cincinnati and Cincinnati Children's Hospital, Cincinnati, Ohio
| | | | | | - Kathryn M Bondra
- Greehey Children's Cancer Research Institute, University of Texas, San Antonio, Texas
| | | | - Peter J Houghton
- Greehey Children's Cancer Research Institute, University of Texas, San Antonio, Texas
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14
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Lagerweij T, Sewing C, van Battum L, Koken P, Heukelom S. Inhalation anesthesia and shielding devices to allow accurate preclinical irradiation of mice with clinical linac-based systems: Design and dosimetric characteristics. Clin Transl Radiat Oncol 2021; 26:92-97. [PMID: 33367118 PMCID: PMC7749295 DOI: 10.1016/j.ctro.2020.11.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Revised: 11/17/2020] [Accepted: 11/21/2020] [Indexed: 11/29/2022] Open
Abstract
This technical note describes two devices to enable accurate irradiation of mice on clinical linac-based systems. To study the effects of radiation in murine, preclinical animal models, controlled and accurate dosing is important. This is not only important when specific volumes need to be irradiated, but also when the whole animal body is irradiated. To enable both purposes, we designed two devices. One device to administer Total Body Irradiation (TBI) simultaneously to six, free walking mice, and a second device, denoted as target box, in which we irradiate specific parts of the mice whilst organs-at-risk (OAR) are protected. In this latter device, we can position the mice in multiple ways. One configuration allows to sedate twelve mice simultaneously by isoflurane inhalation anesthesia and protect the body by lead shielding to allow radiation of the head only. Alternatively, the target box can be used to sedate maximal 4 mice simultaneously to irradiate the flank or paws only. All these setups allow high experimental throughput and thus a minimal occupation of the clinical equipment. As measured, the delivered radiation dosages in the regions of interest were accurate for both devices. In this technical note, we describe the design and build of these devices.
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Affiliation(s)
- Tonny Lagerweij
- Department of Neurosurgery, Cancer Center Amsterdam, Amsterdam University Medical Centers, Location VUmc, Amsterdam, the Netherlands
| | - Charlotte Sewing
- Department of Paediatric Oncology, Cancer Center Amsterdam, Amsterdam University Medical Centers, Location VUmc, Amsterdam, the Netherlands
| | - Leo van Battum
- Department of Radiation Oncology, Amsterdam University Medical Centers, Location VUmc, Amsterdam, the Netherlands
| | - Phil Koken
- Department of Radiation Oncology, Amsterdam University Medical Centers, Location VUmc, Amsterdam, the Netherlands
| | - Stan Heukelom
- Department of Radiation Oncology, Amsterdam University Medical Centers, Location VUmc, Amsterdam, the Netherlands
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15
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Vanneste BG, Van Limbergen EJ, Dubois L, Samarska IV, Wieten L, Aarts MJ, Marcelissen T, De Ruysscher D. Immunotherapy as sensitizer for local radiotherapy. Oncoimmunology 2020; 9:1832760. [PMID: 33194319 PMCID: PMC7605354 DOI: 10.1080/2162402x.2020.1832760] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 09/30/2020] [Accepted: 10/02/2020] [Indexed: 12/28/2022] Open
Abstract
The purpose of this report was to systematically review the radiation enhancement factor (REF) effects of immunotherapy on radiotherapy (RT) to the local tumor in comparison with other traditional radiation sensitizers such as cisplatin. PubMed and Medline databases were searched until February 2019. Reports with abscopal effect in the results were excluded. Graphs of the selected papers were digitized using Plot Digitizer (Sourceforge.net) in order to calculate the tumor growth delay (TGD) caused by immunotherapy. To enable comparison between different studies,the TGD were used to define the REF between RT versus the RT/immunotherapy combination. Thirty-two preclinical papers, and nine clinical series were selected. Different mouse models were exposed to RT doses ranging from 1 to 10 fractions of 1.8 to 20 Gray (Gy) per fraction. Endpoints were heterogeneous, ranging from regression to complete local response. No randomized clinical studies were identified. The median preclinical REF effect of different immunotherapy was varying from 1.7 to 9.1. There was no relationship observed either with subclasses of immunotherapy orRT doses. In the clinical studies, RT doses ranged from 1 to 37 fractions of 1.8 to 24 Gy per fraction. Most clinical trials used ipilimumab and interleukin-2. Local control rate in the clinical series ranged from 66% to 100%. A strong REF of immunotherapy (1.7 to 9.1) was observed, this being higher than traditionally sensitizers such as cisplatin (1.1). This result implies that for the same RT dose, a higher local control was achieved with a combination of immunotherapy and RT in preclinical settings. This study therefore supports the use of combined RT and immunotherapy to improve local tumor control in clinical settings without exacerbation of toxicities.
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Affiliation(s)
- Ben G.L. Vanneste
- Department of Radiation Oncology (MAASTRO Clinic), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Evert J Van Limbergen
- Department of Radiation Oncology (MAASTRO Clinic), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Ludwig Dubois
- The M-Lab, Department of Precision Medicine, GROW - School for Oncology and Developmental Biology, Maastricht University, Maastricht, The Netherlands
| | - Iryna V. Samarska
- Department of Pathology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - L. Wieten
- Department of Transplantation Immunology, Tissue Typing Laboratory, GROW School for Oncology and Developmental Biology, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - M. J.B. Aarts
- Department of Medical Oncology, GROW - School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - T. Marcelissen
- Department of Urology, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Dirk De Ruysscher
- Department of Radiation Oncology (MAASTRO Clinic), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, The Netherlands
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16
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Plavc G, Jesenko T, Oražem M, Strojan P. Challenges in Combining Immunotherapy with Radiotherapy in Recurrent/Metastatic Head and Neck Cancer. Cancers (Basel) 2020; 12:E3197. [PMID: 33143094 PMCID: PMC7692120 DOI: 10.3390/cancers12113197] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2020] [Accepted: 10/28/2020] [Indexed: 12/14/2022] Open
Abstract
Immunotherapy with immune checkpoint inhibitors (ICI) has recently become a standard part of the treatment of recurrent or metastatic head and neck squamous cell carcinoma (R/M HNSCC), although the response rates are low. Numerous preclinical and clinical studies have now illuminated several mechanisms by which radiotherapy (RT) enhances the effect of ICI. From RT-induced immunogenic cancer cell death to its effect on the tumor microenvironment and vasculature, the involved mechanisms are diverse and intertwined. Moreover, the research of these interactions is challenging because of the thin line between immunostimulatory and the immunosuppressive effect of RT. In the era of active research of immunoradiotherapy combinations, the significance of treatment and host-related factors that were previously seen as being less important is being revealed. The impact of dose and fractionation of RT is now well established, whereas selection of the number and location of the lesions to be irradiated in a multi-metastatic setting is something that is only now beginning to be understood. In addition to spatial factors, the timing of irradiation is as equally important and is heavily dependent on the type of ICI used. Interestingly, using smaller-than-conventional RT fields or even partial tumor volume RT could be beneficial in this setting. Among host-related factors, the role of the microbiome on immunotherapy efficacy must not be overlooked nor can we neglect the role of gut irradiation in a combined RT and ICI setting. In this review we elaborate on synergistic mechanisms of immunoradiotherapy combinations, in addition to important factors to consider in future immunoradiotherapy trial designs in R/M HNSCC.
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Affiliation(s)
- Gaber Plavc
- Department of Radiation Oncology, Institute of Oncology Ljubljana, 1000 Ljubljana, Slovenia; (M.O.); (P.S.)
- Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia;
| | - Tanja Jesenko
- Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia;
- Department of Experimental Oncology, Institute of Oncology Ljubljana, 1000 Ljubljana, Slovenia
| | - Miha Oražem
- Department of Radiation Oncology, Institute of Oncology Ljubljana, 1000 Ljubljana, Slovenia; (M.O.); (P.S.)
- Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia;
| | - Primož Strojan
- Department of Radiation Oncology, Institute of Oncology Ljubljana, 1000 Ljubljana, Slovenia; (M.O.); (P.S.)
- Faculty of Medicine, University of Ljubljana, 1000 Ljubljana, Slovenia;
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Evaluation of a Novel Liquid Fiducial Marker, BioXmark ®, for Small Animal Image-Guided Radiotherapy Applications. Cancers (Basel) 2020; 12:cancers12051276. [PMID: 32443537 PMCID: PMC7280978 DOI: 10.3390/cancers12051276] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 05/12/2020] [Accepted: 05/14/2020] [Indexed: 12/17/2022] Open
Abstract
BioXmark® (Nanovi A/S, Denmark) is a novel fiducial marker based on a liquid, iodine-based and non-metallic formulation. BioXmark® has been clinically validated and reverse translated to preclinical models to improve cone-beam CT (CBCT) target delineation in small animal image-guided radiotherapy (SAIGRT). However, in phantom image analysis and in vivo evaluation of radiobiological response after the injection of BioXmark® are yet to be reported. In phantom measurements were performed to compare CBCT imaging artefacts with solid fiducials and determine optimum imaging parameters for BioXmark®. In vivo stability of BioXmark® was assessed over a 5-month period, and the impact of BioXmark® on in vivo tumour response from single-fraction and fractionated X-ray exposures was investigated in a subcutaneous syngeneic tumour model. BioXmark® was stable, well tolerated and detectable on CBCT at volumes ≤10 µL. Our data showed imaging artefacts reduced by up to 84% and 89% compared to polymer and gold fiducial markers, respectively. BioXmark® was shown to have no significant impact on tumour growth in control animals, but changes were observed in irradiated animals injected with BioXmark® due to alterations in dose calculations induced by the sharp contrast enhancement. BioXmark® is superior to solid fiducials with reduced imaging artefacts on CBCT. With minimal impact on the tumour growth delay, BioXmark® can be implemented in SAIGRT to improve target delineation and reduce set-up errors.
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18
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Selvaraj J, Rhall G, Ibrahim M, Mahmood T, Freeman N, Gromek Z, Buchanan G, Syed F, Elsaleh H, Quah BJC. Custom-designed Small Animal focal iRradiation Jig (SARJ): design, manufacture and dosimetric evaluation. BJR Open 2020; 2:20190045. [PMID: 33178966 PMCID: PMC7594899 DOI: 10.1259/bjro.20190045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 01/02/2020] [Accepted: 02/16/2020] [Indexed: 12/15/2022] Open
Abstract
OBJECTIVE Preclinical animal models allow testing and refinement of novel therapeutic strategies. The most common preclinical animal irradiators are fixed source cabinet irradiators, which are vastly inferior to clinical linear accelerators capable of delivering highly conformal and precise treatments. The purpose of this study was to design, manufacture and test an irradiation jig (small animal focal irradiation jig, SARJ) that would enable focal irradiation of subcutaneous tumours in a standard fixed source cabinet irradiator. METHODS AND MATERIALS A lead shielded SARJ was designed to rotate animal holders about the longitudinal axis and slide vertically from the base plate. Radiation dosimetry was undertaken using the built-in ion chamber and GAFChromic RTQA2 and EBT-XD films. Treatment effectiveness was determined by irradiating mice with subcutaneous melanoma lesions using a dose of 36 Gy in three fractions (12 Gy x 3) over three consecutive days. RESULTS The SARJ was tested for X-ray shielding effectiveness, verification of dose rate, total dose delivered to tumour and dose uniformity. Accurate and uniform delivery of X-ray dose was achieved. X-ray doses were limited to the tumour site when animal holders were rotated around their longitudinal axis to 15o and 195o, allowing sequential dose delivery using parallel-opposed tangential beams. Irradiation of subcutaneous melanoma tumour established on the flanks of mice showed regression. CONCLUSION SARJ enabled delivery of tangential parallel-opposed radiation beams to subcutaneous tumours in up to five mice simultaneously. SARJ allowed high throughput testing of clinically relevant dose delivery using a standard cabinet-style fixed source irradiator. ADVANCES IN KNOWLEDGE A custom designed jig has been manufactured to fit into conventional cabinet irradiators and is dosimetrically validated to deliver clinically relevant dose distributions to subcutaneous tumours in mice for preclinical studies.
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Affiliation(s)
| | - Graham Rhall
- The John Curtin School of Medical Research, Australian National University, Canberra, ACT, Australia
| | - Mounir Ibrahim
- Medical Physics and Radiation Engineering, Canberra Health Services, Canberra, ACT, Australia
| | - Talat Mahmood
- Medical Physics and Radiation Engineering, Canberra Health Services, Canberra, ACT, Australia
| | - Nigel Freeman
- Medical Physics and Radiation Engineering, Canberra Health Services, Canberra, ACT, Australia
| | - Zennon Gromek
- Medical Physics and Radiation Engineering, Canberra Health Services, Canberra, ACT, Australia
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19
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Rajab Bolookat E, Malhotra H, Rich LJ, Sexton S, Curtin L, Spernyak JA, Singh AK, Seshadri M. Development and Validation of a Clinically Relevant Workflow for MR-Guided Volumetric Arc Therapy in a Rabbit Model of Head and Neck Cancer. Cancers (Basel) 2020; 12:cancers12030572. [PMID: 32121562 PMCID: PMC7139631 DOI: 10.3390/cancers12030572] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2020] [Revised: 02/26/2020] [Accepted: 02/26/2020] [Indexed: 01/09/2023] Open
Abstract
There is increased interest in the use of magnetic resonance imaging (MRI) for guiding radiation therapy (RT) in the clinical setting. In this regard, preclinical studies can play an important role in understanding the added value of MRI in RT planning. In the present study, we developed and validated a clinically relevant integrated workflow for MRI-guided volumetric arc therapy (VMAT) in a VX2 rabbit neck tumor model of HNSCC. In addition to demonstrating safety and feasibility, we examined the therapeutic impact of MR-guided VMAT using a single high dose to obtain proof-of-concept and compared the response to conventional 2D-RT. Contrast-enhanced MRI (CE-MRI) provided excellent soft tissue contrast for accurate tumor segmentation for VMAT. Notably, MRI-guided RT enabled improved tumor targeting ability and minimal dose to organs at risk (OAR) compared to 2D-RT, which resulted in notable morbidity within a few weeks of RT. Our results highlight the value of integrating MRI into the workflow for VMAT for improved delineation of tumor anatomy and optimal treatment planning. The model combined with the multimodal imaging approach can serve as a valuable platform for the conduct of preclinical RT trials.
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Affiliation(s)
- Eftekhar Rajab Bolookat
- Laboratory for Translational Imaging, Center for Oral Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA; (E.R.B.); (L.J.R.)
- Department of Radiology—Medical Physics Program, University at Buffalo—Jacobs School of Medicine and Biomedical Sciences, 955 Main Street, Buffalo, NY 14203, USA; (H.M.); (J.A.S.)
| | - Harish Malhotra
- Department of Radiology—Medical Physics Program, University at Buffalo—Jacobs School of Medicine and Biomedical Sciences, 955 Main Street, Buffalo, NY 14203, USA; (H.M.); (J.A.S.)
- Department of Radiation Medicine, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA;
| | - Laurie J. Rich
- Laboratory for Translational Imaging, Center for Oral Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA; (E.R.B.); (L.J.R.)
| | - Sandra Sexton
- Laboratory Animal Shared Resource, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA; (S.S.); (L.C.)
| | - Leslie Curtin
- Laboratory Animal Shared Resource, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA; (S.S.); (L.C.)
| | - Joseph A. Spernyak
- Department of Radiology—Medical Physics Program, University at Buffalo—Jacobs School of Medicine and Biomedical Sciences, 955 Main Street, Buffalo, NY 14203, USA; (H.M.); (J.A.S.)
- Department of Cell Stress Biology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
| | - Anurag K. Singh
- Department of Radiation Medicine, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA;
| | - Mukund Seshadri
- Laboratory for Translational Imaging, Center for Oral Oncology, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA; (E.R.B.); (L.J.R.)
- Department of Radiology—Medical Physics Program, University at Buffalo—Jacobs School of Medicine and Biomedical Sciences, 955 Main Street, Buffalo, NY 14203, USA; (H.M.); (J.A.S.)
- Department of Dentistry and Maxillofacial Prosthetics, Roswell Park Comprehensive Cancer Center, Buffalo, NY 14263, USA
- Correspondence:
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20
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De Ruysscher D, Faivre-Finn C, Nackaerts K, Jordan K, Arends J, Douillard J, Ricardi U, Peters S. Recommendation for supportive care in patients receiving concurrent chemotherapy and radiotherapy for lung cancer. Ann Oncol 2020; 31:41-49. [DOI: 10.1016/j.annonc.2019.10.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 09/06/2019] [Accepted: 10/08/2019] [Indexed: 12/13/2022] Open
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Sridharan V, Schoenfeld JD. Immunotherapy and Radiation: Charting a Path Forward Together. Hematol Oncol Clin North Am 2019; 33:1057-1069. [PMID: 31668206 DOI: 10.1016/j.hoc.2019.08.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Preclinical studies combining immunotherapy and radiation therapy have suggested promising synergy, prompting translation into clinical trials. Radiation has been shown to significantly alter the tumor microenvironment, cause immunogenic cell death, and potentiate anti-tumor immune responses. Several radiation parameters may modulate these effects. Clinical data to date have suggested that combination therapy is largely well tolerated, but additional study is warranted to better estimate both short-term and long-term risks of combination treatment and extend these data to new immunotherapy agents. Ensuring proper radiation access and quality is critical to the success of future trials.
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Affiliation(s)
- Vishwajith Sridharan
- Department of Medicine, Massachusetts General Hospital, 75 Fruit Street, Boston, MA 02114, USA
| | - Jonathan D Schoenfeld
- Department of Radiation Oncology, Brigham and Women's Hospital/Dana-Farber Cancer Institute, 75 Francis Street, L2, Boston, MA 02115, USA.
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22
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Dünker N, Jendrossek V. Implementation of the Chick Chorioallantoic Membrane (CAM) Model in Radiation Biology and Experimental Radiation Oncology Research. Cancers (Basel) 2019; 11:cancers11101499. [PMID: 31591362 PMCID: PMC6826367 DOI: 10.3390/cancers11101499] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2019] [Revised: 09/19/2019] [Accepted: 09/20/2019] [Indexed: 02/07/2023] Open
Abstract
Radiotherapy (RT) is part of standard cancer treatment. Innovations in treatment planning and increased precision in dose delivery have significantly improved the therapeutic gain of radiotherapy but are reaching their limits due to biologic constraints. Thus, a better understanding of the complex local and systemic responses to RT and of the biological mechanisms causing treatment success or failure is required if we aim to define novel targets for biological therapy optimization. Moreover, optimal treatment schedules and prognostic biomarkers have to be defined for assigning patients to the best treatment option. The complexity of the tumor environment and of the radiation response requires extensive in vivo experiments for the validation of such treatments. So far in vivo investigations have mostly been performed in time- and cost-intensive murine models. Here we propose the implementation of the chick chorioallantoic membrane (CAM) model as a fast, cost-efficient model for semi high-throughput preclinical in vivo screening of the modulation of the radiation effects by molecularly targeted drugs. This review provides a comprehensive overview on the application spectrum, advantages and limitations of the CAM assay and summarizes current knowledge of its applicability for cancer research with special focus on research in radiation biology and experimental radiation oncology.
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Affiliation(s)
- Nicole Dünker
- Institute for Anatomy II, Department of Neuroanatomy, University of Duisburg-Essen, University Medicine Essen, 45122 Essen, Germany.
| | - Verena Jendrossek
- Institute of Cell Biology (Cancer Research), University of Duisburg-Essen, University Medicine Essen, 45122 Essen, Germany.
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Narayanan JSS, Ray P, Hayashi T, Whisenant TC, Vicente D, Carson DA, Miller AM, Schoenberger SP, White RR. Irreversible Electroporation Combined with Checkpoint Blockade and TLR7 Stimulation Induces Antitumor Immunity in a Murine Pancreatic Cancer Model. Cancer Immunol Res 2019; 7:1714-1726. [PMID: 31409607 DOI: 10.1158/2326-6066.cir-19-0101] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 04/26/2019] [Accepted: 08/09/2019] [Indexed: 12/14/2022]
Abstract
Irreversible electroporation (IRE) is a nonthermal ablation technique that is used clinically in selected patients with locally advanced pancreatic cancer, but most patients develop recurrent distant metastatic disease. We hypothesize that IRE can induce an in situ vaccination effect by releasing tumor neoantigens in an inflammatory context. Using an immunocompetent mouse model, we demonstrated that IRE alone produced complete regression of subcutaneous tumors in approximately 20% to 30% of mice. IRE was not effective in immunodeficient mice. Mice with complete response to IRE demonstrated prophylactic immunity and remained tumor free when rechallenged with secondary tumors on the contralateral flank. CD8+ T cells from IRE-responsive mice were reactive against peptides representing model-inherent alloantigens and conferred protection against tumor challenge when adoptively transferred into immunocompromised, tumor-naïve mice. Combining IRE with intratumoral Toll-like receptor-7 (TLR7) agonist (1V270) and systemic anti-programmed death-1 receptor (PD)-1 checkpoint blockade resulted in improved treatment responses. This combination also resulted in elimination of untreated concomitant distant tumors (abscopal effects), an effect not seen with IRE alone. These results suggest that the systemic antitumor immune response triggered by IRE can be enhanced by stimulating the innate immune system with a TLR7 agonist and the adaptive immune system with anti-PD-1 checkpoint blockade simultaneously. Combinatorial approaches such as this may help overcome the immunosuppressive pancreatic cancer microenvironment.
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Affiliation(s)
| | - Partha Ray
- Moores Cancer Center, University of California San Diego, San Diego, California
| | - Tomoko Hayashi
- Moores Cancer Center, University of California San Diego, San Diego, California
| | - Thomas C Whisenant
- Department of Computational Biology, University of California San Diego, San Diego, California
| | - Diego Vicente
- Moores Cancer Center, University of California San Diego, San Diego, California
| | - Dennis A Carson
- Moores Cancer Center, University of California San Diego, San Diego, California
| | - Aaron M Miller
- Moores Cancer Center, University of California San Diego, San Diego, California.,La Jolla Institute of Allergy and Immunology, La Jolla, California
| | | | - Rebekah R White
- Moores Cancer Center, University of California San Diego, San Diego, California.
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24
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DuRoss AN, Neufeld MJ, Rana S, Thomas CR, Sun C. Integrating nanomedicine into clinical radiotherapy regimens. Adv Drug Deliv Rev 2019; 144:35-56. [PMID: 31279729 PMCID: PMC6745263 DOI: 10.1016/j.addr.2019.07.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 07/02/2019] [Accepted: 07/02/2019] [Indexed: 01/06/2023]
Abstract
While the advancement of clinical radiotherapy was driven by technological innovations throughout the 20th century, continued improvement relies on rational combination therapies derived from biological insights. In this review, we highlight the importance of combination radiotherapy in the era of precision medicine. Specifically, we survey and summarize the areas of research where improved understanding in cancer biology will propel the field of radiotherapy forward by allowing integration of novel nanotechnology-based treatments.
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Affiliation(s)
- Allison N DuRoss
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Portland, OR 97201, USA
| | - Megan J Neufeld
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Portland, OR 97201, USA
| | - Shushan Rana
- Department of Radiation Medicine, School of Medicine, Oregon Health & Science University, Portland, OR 97239, USA
| | - Charles R Thomas
- Department of Radiation Medicine, School of Medicine, Oregon Health & Science University, Portland, OR 97239, USA
| | - Conroy Sun
- Department of Pharmaceutical Sciences, College of Pharmacy, Oregon State University, Portland, OR 97201, USA; Department of Radiation Medicine, School of Medicine, Oregon Health & Science University, Portland, OR 97239, USA.
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25
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Ghita M, Dunne VL, McMahon SJ, Osman SO, Small DM, Weldon S, Taggart CC, McGarry CK, Hounsell AR, Graves EE, Prise KM, Hanna GG, Butterworth KT. Preclinical Evaluation of Dose-Volume Effects and Lung Toxicity Occurring In and Out-of-Field. Int J Radiat Oncol Biol Phys 2019; 103:1231-1240. [PMID: 30552964 DOI: 10.1016/j.ijrobp.2018.12.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2017] [Revised: 11/29/2018] [Accepted: 12/06/2018] [Indexed: 12/11/2022]
Abstract
PURPOSE The aim of this study was to define the dose and dose-volume relationship of radiation-induced pulmonary toxicities occurring in and out-of-field in mouse models of early inflammatory and late fibrotic response. MATERIALS AND METHODS Early radiation-induced inflammation and fibrosis were investigated in C3H/NeJ and C57BL/6J mice, respectively. Animals were irradiated with 20 Gy delivered to the upper region of the right lung as a single fraction or as 3 consecutive fractions using the Small Animal Radiation Research Platform (Xstrahl Inc, Camberley, UK). Cone beam computed tomography was performed for image guidance before irradiation and to monitor late toxicity. Histologic sections were examined for neutrophil and macrophage infiltration as markers of early inflammatory response and type I collagen staining as a marker of late-occurring fibrosis. Correlation was evaluated with the dose-volume histogram parameters calculated for individual mice and changes in the observed cone beam computed tomography values. RESULTS Mean lung dose and the volume receiving over 10 Gy (V10) showed significant correlation with late responses for single and fractionated exposures in directly targeted volumes. Responses observed outside the target volume were attributed to nontargeted effects and showed no dependence on either mean lung dose or V10. CONCLUSIONS Quantitative assessment of normal tissue response closely correlates early and late pulmonary response with clinical parameters, demonstrating this approach as a potential tool to facilitate clinical translation of preclinical studies. Out-of-field effects were observed but did not correlate with dosimetric parameters, suggesting that nontargeted effects may have a role in driving toxicities outside the treatment field.
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Affiliation(s)
- Mihaela Ghita
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, Northern Ireland, United Kingdom.
| | - Victoria L Dunne
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, Northern Ireland, United Kingdom
| | - Stephen J McMahon
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, Northern Ireland, United Kingdom
| | - Sarah O Osman
- Northern Ireland Cancer Centre, Queen's University Belfast, Northern Ireland, United Kingdom
| | - Donna M Small
- Centre for Experimental Medicine, Queen's University Belfast, Northern Ireland, United Kingdom
| | - Sinead Weldon
- Centre for Experimental Medicine, Queen's University Belfast, Northern Ireland, United Kingdom
| | - Clifford C Taggart
- Centre for Experimental Medicine, Queen's University Belfast, Northern Ireland, United Kingdom
| | - Conor K McGarry
- Northern Ireland Cancer Centre, Queen's University Belfast, Northern Ireland, United Kingdom
| | - Alan R Hounsell
- Northern Ireland Cancer Centre, Queen's University Belfast, Northern Ireland, United Kingdom
| | - Edward E Graves
- Department of Radiation Oncology, Stanford Cancer Center, Stanford University, Stanford, California
| | - Kevin M Prise
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, Northern Ireland, United Kingdom
| | - Gerard G Hanna
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, Northern Ireland, United Kingdom; Northern Ireland Cancer Centre, Queen's University Belfast, Northern Ireland, United Kingdom
| | - Karl T Butterworth
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, Northern Ireland, United Kingdom
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Evolution of the Supermodel: Progress in Modelling Radiotherapy Response in Mice. Clin Oncol (R Coll Radiol) 2019; 31:272-282. [PMID: 30871751 DOI: 10.1016/j.clon.2019.02.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Revised: 02/14/2019] [Accepted: 02/15/2019] [Indexed: 12/18/2022]
Abstract
Mouse models are essential tools in cancer research that have been used to understand the genetic basis of tumorigenesis, cancer progression and to test the efficacies of anticancer treatments including radiotherapy. They have played a critical role in our understanding of radiotherapy response in tumours and normal tissues and continue to evolve to better recapitulate the underlying biology of humans. In addition, recent developments in small animal irradiators have significantly improved in vivo irradiation techniques, allowing previously unimaginable experimental approaches to be explored in the laboratory. The combination of contemporary mouse models with small animal irradiators represents a major step forward for the radiobiology field in being able to much more accurately replicate clinical exposure scenarios. As radiobiology studies become ever more sophisticated in reflecting developments in the clinic, it is increasingly important to understand the basis and potential limitations of extrapolating data from mice to humans. This review provides an overview of mouse models and small animal radiotherapy platforms currently being used as advanced radiobiological research tools towards improving the translational power of preclinical studies.
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Ghita M, Dunne V, Hanna GG, Prise KM, Williams JP, Butterworth KT. Preclinical models of radiation-induced lung damage: challenges and opportunities for small animal radiotherapy. Br J Radiol 2019; 92:20180473. [PMID: 30653332 DOI: 10.1259/bjr.20180473] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Despite a major paradigm shift in radiotherapy planning and delivery over the past three decades with continuing refinements, radiation-induced lung damage (RILD) remains a major dose limiting toxicity in patients receiving thoracic irradiations. Our current understanding of the biological processes involved in RILD which includes DNA damage, inflammation, senescence and fibrosis, is based on clinical observations and experimental studies in mouse models using conventional radiation exposures. Whilst these studies have provided vital information on the pulmonary radiation response, the current implementation of small animal irradiators is enabling refinements in the precision and accuracy of dose delivery to mice which can be applied to studies of RILD. This review presents the current landscape of preclinical studies in RILD using small animal irradiators and highlights the challenges and opportunities for the further development of this emerging technology in the study of normal tissue damage in the lung.
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Affiliation(s)
- Mihaela Ghita
- 1 Centre for Cancer Research and Cell Biology, Queen's University Belfast , Belfast , Northern Ireland, UK
| | - Victoria Dunne
- 1 Centre for Cancer Research and Cell Biology, Queen's University Belfast , Belfast , Northern Ireland, UK
| | - Gerard G Hanna
- 1 Centre for Cancer Research and Cell Biology, Queen's University Belfast , Belfast , Northern Ireland, UK.,2 Northern Ireland Cancer Centre, Belfast City Hospital , Belfast , Northern Ireland, UK
| | - Kevin M Prise
- 1 Centre for Cancer Research and Cell Biology, Queen's University Belfast , Belfast , Northern Ireland, UK
| | - Jaqueline P Williams
- 3 University of Rochester Medical Centre, University of Rochester , Rochester , USA
| | - Karl T Butterworth
- 1 Centre for Cancer Research and Cell Biology, Queen's University Belfast , Belfast , Northern Ireland, UK
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28
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Integrating Small Animal Irradiators withFunctional Imaging for Advanced Preclinical Radiotherapy Research. Cancers (Basel) 2019; 11:cancers11020170. [PMID: 30717307 PMCID: PMC6406472 DOI: 10.3390/cancers11020170] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 01/23/2019] [Accepted: 01/29/2019] [Indexed: 12/16/2022] Open
Abstract
Translational research aims to provide direct support for advancing novel treatment approaches in oncology towards improving patient outcomes. Preclinical studies have a central role in this process and the ability to accurately model biological and physical aspects of the clinical scenario in radiation oncology is critical to translational success. The use of small animal irradiators with disease relevant mouse models and advanced in vivo imaging approaches offers unique possibilities to interrogate the radiotherapy response of tumors and normal tissues with high potential to translate to improvements in clinical outcomes. The present review highlights the current technology and applications of small animal irradiators, and explores how these can be combined with molecular and functional imaging in advanced preclinical radiotherapy research.
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29
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Almeida IP, Vaniqui A, Schyns LE, van der Heyden B, Cooley J, Zwart T, Langenegger A, Verhaegen F. Exploring the feasibility of a clinical proton beam with an adaptive aperture for pre-clinical research. Br J Radiol 2018; 92:20180446. [PMID: 30362812 DOI: 10.1259/bjr.20180446] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE: To investigate whether the Mevion S250i with HYPERSCAN clinical proton system could be used for pre-clinical research with millimetric beams. METHODS: The nozzle of the proton beam line, consisting of an energy modulation system (EMS) and an adaptive aperture (AA), was modelled with the TOPAS Monte Carlo Simulation Toolkit. With the EMS, the 230 MeV beam nominal range can be decreased in multiples of 2.1 mm. Monte Carlo dose calculations were performed in a mouse lung tumour CT image. The AA allows fields as small as 5 × 1 mm2 to be used for irradiation. The best plans to give 2 Gy to the tumour were derived from a set of discrete energies allowed by the EMS, different field sizes and beam directions. The final proton plans were compared to a precision photon irradiation plan. Treatment times were also assessed. RESULTS: Seven different proton beam plans were investigated, with a good coverage to the tumour (D95 > 1.95 Gy, D5 < 2.3 Gy) and with potentially less damage to the organs at risk than the photon plan. For very small fields and low energies, the number of protons arriving to the target drops to 1-3%, nevertheless the treatment times would be below 5 s. CONCLUSION: The proton plans made in this study, collimated by an AA, could be used for animal irradiation. ADVANCES IN KNOWLEDGE: This is one of the first study to demonstrate the feasibility of pre-clinical research with a clinical proton beam with an adaptive aperture used to create small fields.
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Affiliation(s)
- Isabel P Almeida
- 1 Department of Radiation Oncology (MAASTRO), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Centre , Maastrich , Netherlands
| | - Ana Vaniqui
- 1 Department of Radiation Oncology (MAASTRO), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Centre , Maastrich , Netherlands
| | - Lotte Ejr Schyns
- 1 Department of Radiation Oncology (MAASTRO), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Centre , Maastrich , Netherlands
| | - Brent van der Heyden
- 1 Department of Radiation Oncology (MAASTRO), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Centre , Maastrich , Netherlands
| | - James Cooley
- 2 Mevion Medical Systems Inc , Littleton, MA , USA
| | | | | | - Frank Verhaegen
- 1 Department of Radiation Oncology (MAASTRO), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Centre , Maastrich , Netherlands
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30
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Persoon L, Hoof SV, van der Kruijssen F, Granton P, Sanchez Rivero A, Beunk H, Dubois L, Doosje JW, Verhaegen F. A novel data management platform to improve image-guided precision preclinical biological research. Br J Radiol 2018; 92:20180455. [PMID: 30260242 DOI: 10.1259/bjr.20180455] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE: Preclinical biological research is mandatory for developing new drugs to investigate the toxicity and efficacy of the drug. In this paper, the focus is on radiobiological research as an example of advanced preclinical biological research. In radiobiology, recent technological advances have produced novel research platforms which can precisely irradiate targets in animals and use advanced onboard image-guidance, mimicking the clinical radiotherapy environment. These platforms greatly facilitate complex research combining several agents simultaneously (in our example, radiation and non-radiation agents). Since these modern platform can produce a large amount of wide-ranging data, one of the main impediments in preclinical research platforms is a proper data management system for preclinical studies. METHODS: A preclinical data management system, inspired by current radiotherapy clinical data management systems was designed. The system was designed with InterSystems technology, i.e. a programmable Enterprise Service Bus solution. New DICOM animal imaging standards are used such as DICOM suppl. 187 for storing small animal acquisition context and the DICOM second generation course model. RESULTS: A small animal big data warehouse environment for research is designed to work with modern image-guided precision research platforms. Its modular design includes (1) a study workflow manager, (2) a data manager, and (3) a storage manager. The system provides interfaces to, e.g. preclinical treatment planning systems and data analysis plug-ins, and guides the user efficiently through the many steps involved in preclinical research. The system manages various data source locations, and arranges access to the data centrally. CONCLUSION: A novel preclinical data management system can be designed to improve preclinical workflow, facilitate data exchange between researchers, and support translation to clinical trials. ADVANCES IN KNOWLEDGE: A preclinical data management system such as the one proposed here would greatly benefit preparation, execution and analysis of biological experiments, and will eventually facilitate translation to clinical trials.
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Affiliation(s)
- Lucas Persoon
- 1 Healthcare department, ICT Group N.V , Eindhoven , Netherlands
| | | | | | | | | | - Harold Beunk
- 1 Healthcare department, ICT Group N.V , Eindhoven , Netherlands
| | - Ludwig Dubois
- 3 Department of Radiation Oncology (MAASTRO), GROW-School for Oncology and Developmental Biology, Maastricht University Medical Centre , Maastricht , Netherlands
| | | | - Frank Verhaegen
- 2 Smart Scientific Solutions B.V , Maastricht , Netherlands.,3 Department of Radiation Oncology (MAASTRO), GROW-School for Oncology and Developmental Biology, Maastricht University Medical Centre , Maastricht , Netherlands
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31
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Williams JP, Newhauser W. Normal tissue damage: its importance, history and challenges for the future. Br J Radiol 2018; 92:20180048. [PMID: 29616836 DOI: 10.1259/bjr.20180048] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Sir Oliver Scott, a philanthropist and radiation biologist and, therefore, the epitome of a gentleman and a scholar, was an early Director of the BECC Radiobiology Research Unit at Mount Vernon. His tenure preceded that of Jack Fowler, with both contributing to basic, translational and clinical thought and application in radiation across the globe. With respect to this review, Fowler's name in particular has remained synonymous with the use of models, both animal and mathematical, that assess and quantify the biological mechanisms that underlie radiation-associated normal tissue toxicities. An understanding of these effects is critical to the optimal use of radiation therapy in the clinic; however, the role that basic sciences play in clinical practice has been undergoing considerable change in recent years, particularly in the USA, where there has been a growing emphasis on engineering and imaging to improve radiation delivery, with empirical observations of clinical outcome taking the place of models underpinned by evidence from basic science experiments. In honour of Scott and Fowler's work, we have taken this opportunity to review how our respective fields of radiation biology and radiation physics have intertwined over the years, affecting the clinical use of radiation with respect to normal tissue outcomes. We discuss the past and current achievements, with the hope of encouraging a revived interest in physics and biology as they relate to radiation oncology practice, since, like Scott and Fowler, we share the goal of improving the future outlook for cancer patients.
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Affiliation(s)
- Jacqueline P Williams
- Departments of Environmental Medicine and Radiation Oncology, University of Rochester Medical Center, Rochester, NY, USA
| | - Wayne Newhauser
- Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA, USA
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32
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Verhaegen F, Dubois L, Gianolini S, Hill MA, Karger CP, Lauber K, Prise KM, Sarrut D, Thorwarth D, Vanhove C, Vojnovic B, Weersink R, Wilkens JJ, Georg D. ESTRO ACROP: Technology for precision small animal radiotherapy research: Optimal use and challenges. Radiother Oncol 2018; 126:471-478. [PMID: 29269093 DOI: 10.1016/j.radonc.2017.11.016] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Accepted: 11/21/2017] [Indexed: 11/30/2022]
Abstract
Many radiotherapy research centers have recently installed novel research platforms enabling the investigation of the radiation response of tumors and normal tissues in small animal models, possibly in combination with other treatment modalities. Many more research institutes are expected to follow in the coming years. These novel platforms are capable of mimicking human radiotherapy more closely than older technology. To facilitate the optimal use of these novel integrated precision irradiators and various small animal imaging devices, and to maximize the impact of the associated research, the ESTRO committee on coordinating guidelines ACROP (Advisory Committee in Radiation Oncology Practice) has commissioned a report to review the state of the art of the technology used in this new field of research, and to issue recommendations. This report discusses the combination of precision irradiation systems, small animal imaging (CT, MRI, PET, SPECT, bioluminescence) systems, image registration, treatment planning, and data processing. It also provides guidelines for reporting on studies.
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Affiliation(s)
- Frank Verhaegen
- Department of Radiation Oncology (MAASTRO), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Centre, The Netherlands
| | - Ludwig Dubois
- Department of Radiation Oncology (MAASTRO), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Centre, The Netherlands
| | | | - Mark A Hill
- CRUK/MRC Oxford Institute for Radiation Oncology, University of Oxford, Gray Laboratories, UK
| | - Christian P Karger
- Department of Medical Physics in Radiation Oncology, German Cancer Research Center, Heidelberg, Germany; National Center for Radiation Research in Oncology (NCRO), Heidelberg Institute for Radiation Oncology (HIRO), Heidelberg, Germany
| | - Kirsten Lauber
- Department of Radiation Oncology, University Hospital, Ludwig-Maximilians-University of Munich, Germany
| | - Kevin M Prise
- Centre for Cancer Research & Cell Biology, Queen's University Belfast, UK
| | - David Sarrut
- Université de Lyon, CREATIS, CNRS UMR5220, Inserm U1044, INSA-Lyon, Université Lyon 1, Centre Léon Bérard, France
| | - Daniela Thorwarth
- Section for Biomedical Physics, Department of Radiation Oncology, University Hospital Tübingen, Germany
| | - Christian Vanhove
- Institute Biomedical Technology (IBiTech), Medical Imaging and Signal Processing (MEDISIP), Ghent University, Belgium
| | - Boris Vojnovic
- CRUK/MRC Oxford Institute for Radiation Oncology, University of Oxford, Gray Laboratories, UK
| | - Robert Weersink
- Department of Radiation Oncology, University of Toronto, Department of Radiation Medicine, Princess Margaret Hospital, Canada
| | - Jan J Wilkens
- Department of Radiation Oncology, Technical University of Munich, Klinikum rechts der Isar, Germany
| | - Dietmar Georg
- Division of Medical Radiation Physics, Department of Radiation Oncology and Christian Doppler Laboratory for Medical Radiation Research for Radiation Oncology, Medical University of Vienna, Austria
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33
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Noblet C, Delpon G, Supiot S, Potiron V, Paris F, Chiavassa S. A new tissue segmentation method to calculate 3D dose in small animal radiation therapy. Radiat Oncol 2018; 13:32. [PMID: 29482652 PMCID: PMC5828405 DOI: 10.1186/s13014-018-0971-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 02/11/2018] [Indexed: 11/22/2022] Open
Abstract
Background In pre-clinical animal experiments, radiation delivery is usually delivered with kV photon beams, in contrast to the MV beams used in clinical irradiation, because of the small size of the animals. At this medium energy range, however, the contribution of the photoelectric effect to absorbed dose is significant. Accurate dose calculation therefore requires a more detailed tissue definition because both density (ρ) and elemental composition (Zeff) affect the dose distribution. Moreover, when applied to cone beam CT (CBCT) acquisitions, the stoichiometric calibration of HU becomes inefficient as it is designed for highly collimated fan beam CT acquisitions. In this study, we propose an automatic tissue segmentation method of CBCT imaging that assigns both density (ρ) and elemental composition (Zeff) in small animal dose calculation. Methods The method is based on the relationship found between CBCT number and ρ*Zeff product computed from known materials. Monte Carlo calculations were performed to evaluate the impact of ρZeff variation on the absorbed dose in tissues. These results led to the creation of a tissue database composed of artificial tissues interpolated from tissue values published by the ICRU. The ρZeff method was validated by measuring transmitted doses through tissue substitute cylinders and a mouse with EBT3 film. Measurements were compared to the results of the Monte Carlo calculations. Results The study of the impact of ρZeff variation over the range of materials, from ρZeff = 2 g.cm− 3 (lung) to 27 g.cm− 3 (cortical bone) led to the creation of 125 artificial tissues. For tissue substitute cylinders, the use of ρZeff method led to maximal and average relative differences between the Monte Carlo results and the EBT3 measurements of 3.6% and 1.6%. Equivalent comparison for the mouse gave maximal and average relative differences of 4.4% and 1.2%, inside the 80% isodose area. Gamma analysis led to a 94.9% success rate in the 10% isodose area with 4% and 0.3 mm criteria in dose and distance. Conclusions Our new tissue segmentation method was developed for 40kVp CBCT images. Both density and elemental composition are assigned to each voxel by using a relationship between HU and the product ρZeff. The method, validated by comparing measurements and calculations, enables more accurate small animal dose distribution calculated on low energy CBCT images.
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Affiliation(s)
- C Noblet
- Medical Physics Department, Institut de Cancérologie de l'Ouest Centre René Gauducheau, 44805, Saint-Herblain, France. .,CRCINA, Inserm U1232, Université de Nantes, Nantes, France.
| | - G Delpon
- Medical Physics Department, Institut de Cancérologie de l'Ouest Centre René Gauducheau, 44805, Saint-Herblain, France.,CRCINA, Inserm U1232, Université de Nantes, Nantes, France
| | - S Supiot
- CRCINA, Inserm U1232, Université de Nantes, Nantes, France.,Radiotherapy Department, Institut de Cancérologie de l'Ouest Centre René Gauducheau, 44805, Saint-Herblain, France
| | - V Potiron
- CRCINA, Inserm U1232, Université de Nantes, Nantes, France.,LABCT, Institut de Cancérologie de l'Ouest Centre René Gauducheau, 44805, Saint-Herblain, France
| | - F Paris
- CRCINA, Inserm U1232, Université de Nantes, Nantes, France.,LABCT, Institut de Cancérologie de l'Ouest Centre René Gauducheau, 44805, Saint-Herblain, France
| | - S Chiavassa
- Medical Physics Department, Institut de Cancérologie de l'Ouest Centre René Gauducheau, 44805, Saint-Herblain, France.,CRCINA, Inserm U1232, Université de Nantes, Nantes, France
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Ghita M, McMahon SJ, Thompson HF, McGarry CK, King R, Osman SOS, Kane JL, Tulk A, Schettino G, Butterworth KT, Hounsell AR, Prise KM. Small field dosimetry for the small animal radiotherapy research platform (SARRP). Radiat Oncol 2017; 12:204. [PMID: 29282134 PMCID: PMC5745702 DOI: 10.1186/s13014-017-0936-3] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2017] [Accepted: 12/02/2017] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND Preclinical radiation biology has become increasingly sophisticated due to the implementation of advanced small animal image guided radiation platforms into laboratory investigation. These small animal radiotherapy devices enable state-of-the-art image guided therapy (IGRT) research to be performed by combining high-resolution cone beam computed tomography (CBCT) imaging with an isocentric irradiation system. Such platforms are capable of replicating modern clinical systems similar to those that integrate a linear accelerator with on-board CBCT image guidance. METHODS In this study, we present a dosimetric evaluation of the small animal radiotherapy research platform (SARRP, Xstrahl Inc.) focusing on small field dosimetry. Physical dosimetry was assessed using ion chamber for calibration and radiochromic film, investigating the impact of beam focus size on the dose rate output as well as beam characteristics (beam shape and penumbra). Two film analysis tools) have been used to assess the dose output using the 0.5 mm diameter aperture. RESULTS Good agreement (between 1.7-3%) was found between the measured physical doses and the data provided by Xstrahl for all apertures used. Furthermore, all small field dosimetry data are in good agreement for both film reading methods and with our Monte Carlo simulations for both focal spot sizes. Furthermore, the small focal spot has been shown to produce a more homogenous beam with more stable penumbra over time. CONCLUSIONS FilmQA Pro is a suitable tool for small field dosimetry, with a sufficiently small sampling area (0.1 mm) to ensure an accurate measurement. The electron beam focus should be chosen with care as this can potentially impact on beam stability and reproducibility.
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Affiliation(s)
- Mihaela Ghita
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, UK.
| | - Stephen J McMahon
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, UK
| | - Hannah F Thompson
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, UK
| | - Conor K McGarry
- Radiotherapy Physics, Northern Ireland Cancer Centre, Belfast City Hospital, Belfast, BT9 7AB, UK
| | - Raymond King
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, UK.,Radiotherapy Physics, Northern Ireland Cancer Centre, Belfast City Hospital, Belfast, BT9 7AB, UK
| | - Sarah O S Osman
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, UK.,Radiotherapy Physics, Northern Ireland Cancer Centre, Belfast City Hospital, Belfast, BT9 7AB, UK
| | - Jonathan L Kane
- Xstrahl Inc, 480 Brogdon Road, Suite 300, Suwanee, GA, 30024, USA
| | - Amanda Tulk
- Xstrahl Ltd, The Coliseum, Watchmoor Park, Riverside Way, Camberley, Surrey, GU15 3YL, UK
| | - Giuseppe Schettino
- National Physical Laboratory, Hampton Road, Teddington, Middlesex, TW11 0LW, UK
| | - Karl T Butterworth
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, UK
| | - Alan R Hounsell
- Radiotherapy Physics, Northern Ireland Cancer Centre, Belfast City Hospital, Belfast, BT9 7AB, UK
| | - Kevin M Prise
- Centre for Cancer Research and Cell Biology, Queen's University Belfast, 97 Lisburn Road, Belfast, BT9 7AE, UK
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35
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Vaniqui A, Schyns LEJR, Almeida IP, van der Heyden B, van Hoof SJ, Verhaegen F. The impact of dual energy CT imaging on dose calculations for pre-clinical studies. Radiat Oncol 2017; 12:181. [PMID: 29157265 PMCID: PMC5696722 DOI: 10.1186/s13014-017-0922-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Accepted: 10/19/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND To investigate the feasibility of using dual-energy CT (DECT) for tissue segmentation and kilovolt (kV) dose calculations in pre-clinical studies and assess potential dose calculation accuracy gain. METHODS Two phantoms and an ex-vivo mouse were scanned in a small animal irradiator with two distinct energies. Tissue segmentation was performed with the single-energy CT (SECT) and DECT methods. A number of different material maps was used. Dose calculations were performed to verify the impact of segmentations on the dose accuracy. RESULTS DECT showed better overall results in comparison to SECT. Higher number of DECT segmentation media resulted in smaller dose differences in comparison to the reference. Increasing the number of materials in the SECT method yielded more instability. Both modalities showed a limit to which adding more materials with similar characteristics ceased providing better segmentation results, and resulted in more noise in the material maps and the dose distributions. The effect was aggravated with a decrease in beam energy. For the ex-vivo specimen, the choice of only one high dense bone for the SECT method resulted in large volumes of tissue receiving high doses. For the DECT method, the choice of more than one kind of bone resulted in lower dose values for the different tissues occupying the same volume. For the organs at risk surrounded by bone, the doses were lower when using the SECT method in comparison to DECT, due to the high absorption of the bone. SECT material segmentation may lead to an underestimation of the dose to OAR in the proximity of bone. CONCLUSIONS The DECT method enabled the selection of a higher number of materials thereby increasing the accuracy in dose calculations. In phantom studies, SECT performed best with three materials and DECT with seven for the phantom case. For irradiations in preclinical studies with kV photon energies, the use of DECT segmentation combined with the choice of a low-density bone is recommended.
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Affiliation(s)
- Ana Vaniqui
- Department of Radiation Oncology (MAASTRO), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Lotte E J R Schyns
- Department of Radiation Oncology (MAASTRO), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Isabel P Almeida
- Department of Radiation Oncology (MAASTRO), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Brent van der Heyden
- Department of Radiation Oncology (MAASTRO), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Stefan J van Hoof
- Department of Radiation Oncology (MAASTRO), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands
| | - Frank Verhaegen
- Department of Radiation Oncology (MAASTRO), GROW - School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, the Netherlands.
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