Article
Radiology, Nuclear Medicine & Medical Imaging
Benjamin Van, Yuni K. Dewaraja, Jeremy T. Niedbala, Gerrid Rosebush, Matthew Kazmierski, David Hubers, Justin K. Mikell, Scott J. Wilderman
Summary: This study designed a practical phantom geometry for measuring absorbed dose of beta-emitting radionuclides and validated a self-developed DPM MC code. The experimental results showed close agreement with measurement results and other MC codes, validating the reliability of this algorithm in clinical radiation therapy dose planning.
Article
Chemistry, Physical
R. Salim, P. Taherparvar
Summary: This study aimed to improve cellular dosimetry of Auger radionuclides by investigating the effect of an applied static uniform magnetic field on absorbed doses of ionizing radiation in micron-sized volumes of liquid water. Results showed that the magnetic field had no impact on self-dose values but slightly increased cross-dose values.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Review
Radiology, Nuclear Medicine & Medical Imaging
David W. O. Rogers
Summary: The author reflects on his experiences using Monte Carlo techniques for Medical Physics applications.
Article
Biology
Thomas C. Wilson, Stephen A. Jannetti, Navjot Guru, Nagavarakishore Pillarsetty, Thomas Reiner, Giacomo Pirovano
Summary: In this study, we developed an improved method for the synthesis of I-123-MAPi and evaluated its performance in an in vitro lung cancer model, demonstrating its rapid internalization and high nuclear uptake capabilities.
INTERNATIONAL JOURNAL OF RADIATION BIOLOGY
(2023)
Article
Engineering, Biomedical
Jonathan Tranel, Felix Y. Feng, Sara St James, Thomas A. Hope
Summary: Acute hematologic toxicity is a common adverse effect of beta-emitter targeted radionuclide therapies (TRTs). Alpha emitters have the potential to deliver high linear energy transfer (LET) radiation to tumors due to their shorter range. When alpha emitters are restricted to the blood pool, they have a lower dose to untargeted trabecular bone compared to beta emitters.
PHYSICS IN MEDICINE AND BIOLOGY
(2021)
Article
Engineering, Biomedical
Marsha Chin, Pejman Rowshanfarzad, Gabor Neveri, Martin A. A. Ebert, David Pfefferle
Summary: Intraoperative radiotherapy (IORT) is a specialized form of radiotherapy that delivers high radiation doses directly to surgically exposed tumor beds. This study examined the dose characteristics of the Zeiss Intrabeam IORT device, which emits near-isotropic X-rays up to 50 kV. The device was simulated using the EGSnrc Monte Carlo code system, and measurements from a soft X-ray parallel-plate ionization chamber were used for model verification. Results showed good agreement between the model and measurements, indicating the potential usefulness of this device for treatment planning.
PHYSICAL AND ENGINEERING SCIENCES IN MEDICINE
(2023)
Article
Chemistry, Physical
V Mariotti, A. Gayol, T. Pianoschi, F. Mattea, J. Vedelago, P. Perez, M. Valente, M. Alva-Sanchez
Summary: Dosimetry in radiotherapy is vital for treatment effectiveness, with gel dosimetry formulations being evaluated for clinical purposes using Monte Carlo simulations and experimental data. Different gel dosimetry formulations are capable of providing reliable dosimetry outputs from 3D dose distributions, even with uncertainties in mass density or mean excitation energy of +/- 10%.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Article
Engineering, Mechanical
P. L. Green, L. J. Devlin, R. E. Moore, R. J. Jackson, J. Li, S. Maskell
Summary: This paper discusses the optimization of the 'L-kernel' in Sequential Monte Carlo samplers to improve performance, resulting in reduced variance of estimates and fewer resampling requirements.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Engineering, Biomedical
R. A. Nadar, G. M. Franssen, N. W. M. Van Dijk, K. Codee-van der Schilden, M. de Weijert, E. Oosterwijk, M. Iafisco, N. Margiotta, S. Heskamp, J. J. J. P. van den Beucken, S. C. G. Leeuwenburgh
Summary: The study demonstrates that systemically administered radioactive bisphosphonate-functionalized platinum (Pt-195m-BP) complexes specifically accumulate in intratibial bone metastatic lesions in mice, showing strong radiotherapeutic activity.
MATERIALS TODAY BIO
(2021)
Article
Multidisciplinary Sciences
Rajesh Regmi, Dominic Maes, Alexander Nevitt, Allison Toltz, Erick Leuro, Jonathan Chen, Lia Halasz, Ramesh Rengan, Charles Bloch, Jatinder Saini
Summary: The study presents a pencil beam scanning (PBS)-based ocular treatment solution. It introduces the design, commissioning, and validation of an applicator mount for a conventional PBS snout to enable ocular treatments. PBS-based ocular therapy allows for inverse planning and accurate dose calculations in the presence of heterogeneities and fiducials.
SCIENTIFIC REPORTS
(2022)
Article
Chemistry, Inorganic & Nuclear
Nooshin Sheykholeslami, Wrya Parwaie, Vahid Vaezzadeh, Mohammad Babaie, Mostafa Farzin, Ghazale Geraily, Amir Hossein Karimi
Summary: This study aimed to evaluate the feasibility of using Ferrous Polyvinyl Alcohol Glutaraldehyde Methylthymol Blue (PVA-GTA-MTB) gel as both a bolus compensator and surface dosimeter in breast radiotherapy. The surface dose measured using PVA-GTA-MTB gel showed differences of 3.74% and 4.18% compared to film dosimetry in the medial and lateral parts of the breast, respectively. Qualitative comparison of the isodose curves indicated that the PVA-GTA-MTB bolus created a uniform dose distribution similar to the superflab bolus in the target volume.
APPLIED RADIATION AND ISOTOPES
(2023)
Article
Radiology, Nuclear Medicine & Medical Imaging
Gunther H. Hartmann, Pedro Andreo, Ralf-Peter Kapsch, Klemens Zink
Summary: The study focuses on the determination of absorbed dose using a converted energy per mass (cema)-based approach, which offers a good understanding of detector response under various measuring conditions. The research demonstrates that the cema approach is particularly useful under non-reference conditions. Correction factors can be expressed and evaluated by cema ratios comprehensively, providing insights for the selection of detectors for specific measurement situations.
Article
Instruments & Instrumentation
A. Tedjani, R. Abdi, D. Boumala, A. Belafrites, J-E Groetz
Summary: This study used Monte Carlo simulation to evaluate the effectiveness of boron neutron capture therapy (BNCT) for brain tumor treatment. The results are consistent with those reported in the literature.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2022)
Article
Biology
Mario Enrique Alcocer Avila, Elif Hindie, Christophe Champion
Summary: This study investigated the influence of I-125 position on energy deposition and dose, and found that the probability of inducing damage in the strand nearest to the I-125 atom is higher. This has important implications for positioning Auger emitters in targeted radionuclide therapy.
INTERNATIONAL JOURNAL OF RADIATION BIOLOGY
(2023)
Article
Engineering, Biomedical
M. Jacquemin, F. Ribeiro, K. Aliane, D. Broggio, D. Franck, A. Desbree
Summary: Accurate determination of cellular absorbed doses is crucial for understanding the in vitro biological effects of incorporated radionuclides, especially for beta emitters with significant cross-dose contributions. A novel approach based on radial distribution functions (rdf) has been developed for efficient calculation of cross-absorbed doses, achieving faster results compared to standard methods and accommodating more complex cellular models. The method was successfully applied and validated for F-18-FDG labeling in PET imaging, with results showing excellent agreement with standard methods and significantly reduced computing time.
PHYSICS IN MEDICINE AND BIOLOGY
(2021)
Article
Veterinary Sciences
Veerle Kersemans, Sheena Wallington, Philip D. Allen, Stuart Gilchrist, Paul Kinchesh, Richard Browning, Katherine A. Vallis, Kathrin Schilling, Phil Holdship, Lee-Anne Stork, Sean Smart
LABORATORY ANIMALS
(2020)
Article
Radiology, Nuclear Medicine & Medical Imaging
Glenn Flux, Iain Murray, Dominic Rushforth, Paul Gape, Carla Abreu, Martin Lee, Ana Ribeiro, Rebecca Gregory, Sarah Chittenden, Jim Thurston, Yong Du, Jonathan Gear
Summary: There is ongoing debate about the risks of secondary malignancies from low levels of radiation exposure. The SOLLID study aims to develop methodology for a large-scale epidemiological investigation of the effect of radiopharmaceutical administrations in diagnostic nuclear medicine procedures and evaluate the uncertainty in radiation dose calculations.
BRITISH JOURNAL OF RADIOLOGY
(2021)
Article
Radiology, Nuclear Medicine & Medical Imaging
Domenico Finocchiaro, Jonathan I. Gear, Federica Fioroni, Glenn D. Flux, Iain Murray, Gastone Castellani, Annibale Versari, Mauro Iori, Elisa Grassi
Article
Radiology, Nuclear Medicine & Medical Imaging
Jan Taprogge, Francesca Leek, Tino Schurrat, Johannes Tran-Gia, Delphine Vallot, Manuel Bardies, Uta Eberlein, Michael Lassmann, Susanne Schloegl, Alex Vergara Gil, Glenn D. Flux
Article
Radiology, Nuclear Medicine & Medical Imaging
Sabina Dizdarevic, Mahdi Abdulla, Taha Sewedy, Charlotte Weston, Caroline Oxley, Jilly Croasdale, Stewart Redman, Sobhan Vinjamuri, Christopher Mayes, Glen Flux, Mike Ward, Richard Graham, John Buscombe
Summary: The COVID-19 pandemic has significantly disrupted nuclear medicine services, with staff absences being a major issue. Tailoring services to local and regional differences in COVID-19 prevalence is crucial, along with timely testing of staff and patients.
NUCLEAR MEDICINE COMMUNICATIONS
(2021)
Article
Oncology
J. Taprogge, J. Wadsley, E. Miles, G. D. Flux
Summary: Multicentre clinical trials with dosimetry components are increasingly important in molecular radiotherapy. Standardization of methodologies is crucial to ensure comparable results across centres. Quality assurance programs should be implemented to support meaningful results.
Editorial Material
Oncology
J. Wadsley, G. Flux
Article
Radiology, Nuclear Medicine & Medical Imaging
Michael J. Trimpl, Djamal Boukerroui, Eleanor P. J. Stride, Katherine A. Vallis, Mark J. Gooding
Summary: A deep learning approach was investigated for 3D segmentation of anatomical structures based on user-provided 2D contours, improving delineation times and contouring consistency. By training models on a diverse set of structures and expanding the training set, segmentation performance for both seen and unseen structures was enhanced. Incorporating contextual information into deep learning models enables generalization and prediction for structures not represented in the training set, facilitating semi-automatic segmentation of CT images.
Article
Engineering, Biomedical
Vaiva Kaveckyte, Asa Carlsson Tedgren, Jose M. Fernandez-Varea
Summary: Diamond detectors in dosimetry show differences in density, excitation energy, and conduction electron number compared to graphite. Using appropriate parameters for diamond simulations can lead to more accurate energy imparted modelling. Attention must be paid to material properties for faithful medium modeling.
PHYSICS IN MEDICINE AND BIOLOGY
(2021)
Article
Engineering, Biomedical
Rodrigo T. Massera, Jose M. Fernandez-Varea, Alessandra Tomal
Summary: Monte Carlo simulations are widely used in breast dosimetry studies, with the choice of photoelectric cross section databases impacting the simulation results and introducing systematic uncertainty. The comparison between two databases showed differences in simulated dosimetric quantities, highlighting the importance of selecting the appropriate cross sections for accurate simulation in mammography.
PHYSICS IN MEDICINE AND BIOLOGY
(2021)
Article
Engineering, Biomedical
Jose M. Fernandez-Varea, Bartosz Gorka, Bo Nilsson
Summary: By analyzing experimental data, we assessed the mass electronic stopping powers of diamond for electrons and positrons, comparing the results to those of graphite.
PHYSICS IN MEDICINE AND BIOLOGY
(2021)
Editorial Material
Biology
Katherine A. Vallis, Roger F. Martin, Nadia Falzone
INTERNATIONAL JOURNAL OF RADIATION BIOLOGY
(2023)
Article
Optics
Suelen F. Barros, Vito R. Vanin, Nora L. Maidana, Alexandre A. Malafronte, Jose M. Fernandez-Varea, Michael S. Pindzola
Summary: We report experimental and theoretical ionization cross sections of the Bi subshells, and find reasonable agreement between different methods despite the large uncertainties associated with the results.
Article
Chemistry, Multidisciplinary
Rajeshwari Tiwari, Prashant S. Shinde, Sreejesh Sreedharan, Anik Kumar Dey, Katherine A. Vallis, Santosh B. Mhaske, Sumit Kumar Pramanik, Amitava Das
Summary: This study demonstrates a proof of concept for a light-activatable prodrug with desired organelle specificity, aiming to address the issues of drug specificity and systemic toxicity of traditional anticancer drugs.
Article
Oncology
Elliot Abbott, Robert Steve Young, Caroline Hale, Kimberly Mitchell, Nadia Falzone, Katherine A. Vallis, Andrew Kennedy
Summary: A dosimetric framework for combining SIRT and EBRT was established based on clinical experience in patients with hepatocellular carcinoma, showing no major toxicity in the combined treatment. A radiobiological modeling framework was developed to manage the combined treatments, and inverse dose planning of EBRT after SIRT could provide improved dose distributions and flexibility to the clinical workflow, further research is needed through prospective trials.
ADVANCES IN RADIATION ONCOLOGY
(2021)