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Mustapha Chaoui (University Mohamed V in Rabat (MA))6/9/26, 9:30โฏAMDosimetry and radiation protection in medicine and biologyOral Presentation
Abstract
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Background: FLASH radiotherapy, characterized by ultra-high dose rates (UHDR), has emerged as a promising modality for tumor control with reduced normal tissue toxicity. Dosimetry under UHDR conditions remains challenging due to detector saturation effects, strong dose-rate dependence, and the limited suitability of conventional dosimetric systems. Silicon carbide (SiC) detectors... -
Jian-Kai Hong (Department of Medical Imaging and Radiological Sciences, Central Taiwan University of Science and Technology, Taichung, Taiwan)6/9/26, 9:45โฏAMDosimetry and radiation protection in medicine and biologyOral Presentation
Purpose:
This study compared dose differences between FilmQA Pro and ImageJ for film dosimetry, using a highโcost professional flatbed scanner and a lowโcost consumer multifunction printer scanner in a clinically relevant breast phantom setup.
Methods:
Following a clinical breast treatment plan, EBT4 was irradiated with a 6โฏMV photon beam and placed at a depth of...
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Prof. David Andrew Bradley (University of Surrey, England)6/9/26, 10:00โฏAMDosimetry and radiation protection in medicine and biologyOral Presentation
This exploratory study investigates the feasibility of thin polytetrafluoroethylene (PTFE) films as passive radiation detectors using a multi-filter badge configuration under mammography X-ray irradiation. PTFE sheets were mounted inside an optically stimulated luminescence badge behind copper, aluminium and plastic filters and irradiated with a 28 kVp beam at doses between 2 and 10 mGy....
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Ahmad abbas6/9/26, 10:15โฏAMDosimetry and radiation protection in medicine and biologyOral Presentation
Purpose: To evaluate dose distribution accuracy in pancreatic stereotactic ablative radiotherapy (SABR) in patients with self-expanding metal biliary stents using Monte Carlo (MC) simulation, incorporating correct stent materials and an improved contouring technique to account for CT artefacts.
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Methods: Two anonymised clinical cases with Nitinol biliary stents were analysed. VMAT treatment... -
Kah Yeen Lim (National Tsing Hua University)6/9/26, 11:00โฏAMDosimetry and radiation protection in medicine and biologyOral Presentation
Boron neutron capture therapy (BNCT) is a targeted radiotherapy that utilizes the selective accumulation of boron-10 within tumors followed by epithermal neutron irradiation. Since BNCT dose components are highly sensitive to neutron spatial distribution and energy spectra, rigorous validation of treatment planning systems (TPS) is essentialโespecially in the presence of clinical...
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Mrs Ana Laura Burin (IPEN/USP)6/9/26, 11:15โฏAMDosimetry and radiation protection in medicine and biologyOral Presentation
The dosimetry of beta-emitting sources presents significant challenges at short distances due to steep dose gradients. Phosphorus-32 (ยณยฒP) sources have been proposed as promising alternatives in brachytherapy, particularly for the palliative treatment of spinal tumors, since the short range of beta particles enables high dose deposition in the target while sparing the spinal cord. The aim of...
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Omar Noor (King Faisal Specialist Hospital and Research Centre)6/9/26, 11:30โฏAMDosimetry and radiation protection in medicine and biologyOral Presentation
Background and objective: CT is a major contributor to the collective medical radiation dose, highlighting the continuous need for optimization particularly for higher-dose examinations such as CT perfusion (CTP). This study aimed to estimate the effective (E, mSv) and eye lens dose (mGy), and to assess imaging protocol (IP) performance.Materials and methods: CT protocols for 1,020...
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Dr Camila Ramos Silva (Energy and Nuclear Research Institute)6/9/26, 11:45โฏAMDosimetry and radiation protection in medicine and biologyOral Presentation
Breast cancer (BC) radiotherapy (RT) relies on accurate dose delivery to the target volume while minimizing exposure to surrounding healthy tissues. In preclinical research, however, access to dedicated small-animal irradiation platforms remains limited due to high costs, particularly in developing countries. This work presents the development and dosimetric validation of a low-cost lead...
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68. LINEAR ACCELERATOR QUALITY ASSURANCE THROUGH A NOVEL ALANINE-BASED POSTAL DOSIMETRY AUDIT SYSTEMARICIA CRUZ (FEDERAL UNIVERSITY OF PERNAMBUCO)6/9/26, 12:00โฏPMDosimetry and radiation protection in medicine and biologyOral Presentation
Within the scope of radiotherapy quality control, external dosimetry audits are essential for identifying systematic errors, improving treatment quality and safety, and promoting standardized dosimetry practices. In this study, the performance of linear accelerators was evaluated using a novel alanine/EPR-based postal dosimetry audit system developed at the Nuclear Energy Department of the...
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Mr CHIEH JUI LI (Chang Gung Memorial Hospital at Linkou, Taiwan)6/9/26, 2:00โฏPMDosimetry and radiation protection in medicine and biologyOral Presentation
Purpose
To evaluate the feasibility of utilizing a lead curtain to reduce scatter radiation in the control console area, ensuring compliance with regulatory dose limits while maintaining clinical workflow efficiency in general radiography.Methods and Materials
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A lead curtain (0.5-mm Pb equivalence, 800 mm ร 2000 mm) was installed at the entrance separating the X-ray examination... -
Adriรกn Dรญaz Comeche (Universitat Politรจcnica de Valรจncia)6/9/26, 2:15โฏPMDosimetry and radiation protection in medicine and biologyOral Presentation
Proton Therapy techniques are recommended to treat tumours in paediatric patients because they can deliver high dose levels to the target volume while sparing dose to surrounding healthy tissues and growing organs, reducing the probability of unwanted secondary effects. However, during proton therapy treatments secondary neutrons are generated in the patient and in the room components,...
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Dr Marta Mumot (MedAustron)6/9/26, 2:30โฏPMDosimetry and radiation protection in medicine and biologyOral Presentation
Proton therapy provides superior dose conformity compared to conventional photon techniques. However, nuclear interactions of therapeutic proton beams generate secondary radiation, particularly neutrons, contributing to out-of-field dose. Although generally low, accurate quantification of these doses is essential for risk assessment, radiation protection optimization, and validation of...
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Massimiliano Antonini (Sapienza University of Rome, Department of Basic and Applied Sciences for Engineering, Rome, Italy)6/9/26, 2:45โฏPMDosimetry and radiation protection in medicine and biologyOral Presentation
Personalized dosimetry is a fundamental tool in nuclear medicine for monitoring and optimizing treatments with radionuclides. WIDMApp (Wearable Individual Dose Monitoring Application) [Morganti et al. Med. Phys. 2021] is an innovative approach under development to improve dosimetric accuracy by enabling personalized dose assessment during Targeted RadioNuclide Treatments (TRNTs) through...
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AMIR HASSAN ENTEZAM (School of Physics, The University of Melbourne, Parkville, VIC 3010, Australia)6/9/26, 3:00โฏPMDosimetry and radiation protection in medicine and biologyOral Presentation
To support clinical translation of propagation-based phase-contrast breast CT (BCT) at the Imaging and Medical Beamline (IMBL) of the Australian Synchrotron, we developed and compared two patient-specific digital breast phantom modelling approaches for Monte Carloโbased mean glandular dose (MGD) estimation. The approaches included: (1) fully voxelated phantoms generated directly from...
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Mrs Tereza Krรกฤmerovรก (Motol and Homolka University Hospital)6/10/26, 11:00โฏAMDosimetry and radiation protection in medicine and biologyOral Presentation
Background:
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Neuroblastoma is a paediatric solid tumour of the sympathetic nervous system, with high-risk disease typically corresponding to advanced-stage (stage 3โ4). Activity administration is guided by body weight, with an initial activity of 444 MBq/kg, while the second cycle is adjusted to a cumulative whole-body absorbed dose of 4 Gy. Despite standardised regimens, absorbed doses to... -
Tommaso Maggipinto (Dipartimento Interateneo di Fisica, Univ. di Bari, Italy and Istituto Nazionale di Fisica Nucleare, Sez. di Bari, Italy)6/10/26, 11:15โฏAMDosimetry and radiation protection in medicine and biologyOral Presentation
Proton radiation therapy exploits the localized energy deposition of proton beams at the Bragg peak. Its main advantage is the ability to deliver a high dose to the tumor while minimizing exposure to surrounding healthy tissues. However some limitations exist; for example, tumors located near critical organs may not receive a sufficiently high therapeutic dose without risking damage to healthy...
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Emma Sofia Bellotti (Politecnico di Milano)6/10/26, 11:30โฏAMDosimetry and radiation protection in medicine and biologyOral Presentation
Accurate control of beam penetration depth is a fundamental requirement in hadrontherapy. Despite advanced treatment planning systems and high-quality imaging, residual uncertainties in Bragg peak positioning persist due to anatomical variability, conversion uncertainties, and intrinsic physical processes. Such deviations may lead to irradiation of healthy tissues beyond the target or...
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GUMERSINDO JESUS VERDU MARTIN (Universitat Politecnica de Valencia)6/10/26, 11:45โฏAMDosimetry and radiation protection in medicine and biologyOral Presentation
Introduction
The image quality reconstruction in Computed Tomography (CT) is dependent on different factors as the number of projections and angular sampling and the reconstruction method. In this work FanโBeam (FB) and ConeโBeam (CB) CT geometries are studied, by different reconstruction algorithms applying reduced angular sampling.Materials and Methods
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It is implemented a methodology... -
Pavel ล pรญลกek (Advacam s.r.o.)6/10/26, 12:00โฏPMDosimetry and radiation protection in medicine and biologyOral Presentation
Background
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FLASH radiotherapy is an emerging technique that delivers radiation at ultra high dose rates (UHDR) and has demonstrated promising preclinical results, achieving effective tumor control while reducing normal tissue toxicity. The aim of this study was to develop a quality assurance (QA) system able to characterize the electron beam of a newly commissioned FLASHKNiFE (TheryQ)... -
HT ZUBAIR (MULTIMEDIA UNIVERSITY, MALAYSIA)6/11/26, 11:00โฏAMDosimetry and radiation protection in medicine and biologyOral Presentation
Ultra-high dose-rate (FLASH) radiotherapy presents significant challenges for real-time dosimetry, particularly due to detector saturation and pulse pile-up at elevated pulse repetition frequencies (PRF). Glass fibre-coupled scintillators are well suited to this environment owing to their prompt radioluminescence response and microsecond-scale timing characteristics, which enable...
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Prof. Gonzalo Garcia (Universidad Politรฉcnica de Madrid (UPM))6/11/26, 11:15โฏAMDosimetry and radiation protection in medicine and biologyOral Presentation
Background and Aims
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Carcinoma during pregnancy presents a complex clinical challenge, requiring a balance between optimal maternal treatment and fetal safety. Radiotherapy is generally avoided during early pregnancy because of potential developmental risks; however, technological advances have improved treatment precision and reduced unintended radiation exposure.
This study evaluates fetal... -
Prof. Gonzalo Garcia (Universidad Politรฉcnica de Madrid (UPM))6/11/26, 11:30โฏAMDosimetry and radiation protection in medicine and biologyOral Presentation
Background and Aims
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The EDNEP project (Evaluation of Neutron Dosimetry Equipment for Proton Therapy Facilities), funded by the Spanish Nuclear Safety Council (CSN), addresses the increasing need for accurate neutron dosimetry in modern proton therapy centers. As the number of proton therapy installations grows in Spain and worldwide, secondary neutron radiation generated during treatment has... -
Andrea Nathalia Vargas Castillo (Czech Technical University in Prague)6/11/26, 11:45โฏAMDosimetry and radiation protection in medicine and biologyOral Presentation
The clinical introduction of magnetic resonance-guided linear accelerators (MR-Linacs) in 2017 represents, to date, one of the most promising techniques for cancer treatment. By combining the high soft-tissue contrast provided by MRI with a linear accelerator, these systems allow for precise radiation delivery, real-time target visualization and tracking, and the potential reduction of...
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Dr Ron Tosh (Radiation Physics Division, National Institute of Standards and Technology)6/11/26, 12:00โฏPMDosimetry and radiation protection in medicine and biologyOral Presentation
While nanopore techniques have transformed genomics, their potential for single-molecule biodosimetry remains untapped. We demonstrate a nanopore-based method to quantify DNA fragmentation in 2500 BP(base pairs) samples in solution, exposed to doses ranging from 1 Gy to 20 Gy of radiation from Co-60 gammas, 150 MeV protons, and Cf-252 neutrons. Using a fabricated nanopipette resistive pulse...
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