A5089222366- Radiation Therapy and Dosimetry
- Radiation Dose and Imaging
- Advanced Radiotherapy Techniques
- Medical Imaging Techniques and Applications
- Advanced X-ray and CT Imaging
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced Neural Network Applications
- Radiopharmaceutical Chemistry and Applications
- Electron and X-Ray Spectroscopy Techniques
- Radiation Detection and Scintillator Technologies
- UAV Applications and Optimization
- Nuclear Physics and Applications
- Robotics and Sensor-Based Localization
- Chemical Reactions and Isotopes
- Nuclear reactor physics and engineering
- Lung Cancer Diagnosis and Treatment
- Radioactive contamination and transfer
- Radioactivity and Radon Measurements
Instituto Superior Técnico
2019-2023
University of Lisbon
2020-2022
Instituto Politécnico de Lisboa
2021
Instituto Superior de Tecnologias Avançadas
2020
The IAEA is currently coordinating a multi-year project to update the TRS-398 Code of Practice for dosimetry external beam radiotherapy based on standards absorbed dose water. One major aspect determination new quality correction factors, k Q , megavoltage photon beams consistent with developments in and technology since publication 2000. Specifically, all values must be on, or with, key data ICRU Report 90. Data sets obtained from Monte Carlo (MC) calculations by advanced users measurements...
Human populations and natural ecosystems are bound to be exposed ionizing radiation from the deposition of artificial radionuclides resulting nuclear accidents, devices or radiological dispersive (“dirty bombs”). On other hand, Naturally Occurring Radioactive Material industries such as phosphate production uranium mining, contribute on site storage residuals with enhanced concentrations radionuclides. Therefore, in context European agreements concerning energy, namely Atomic Energy...
Radiological monitoring is fundamental for compliance with radiological protection policies in the aftermath of events, such as nuclear accidents, terrorism, and out-of-commission uranium mines. An effective strategy radiation to use detectors coupled Unmanned Aerial Vehicles (UAVs), enabling quicker surveillance large areas without involving need human presence target area. The main aim this study was formulate parameters a UAV flight preparation future field measurements using...
Abstract The beam quality correction factor, , which corrects for the difference in ionization chamber response between reference and clinical quality, is an integral part of radiation therapy dosimetry. uncertainty one most significant sources dose determination. To improve accuracy available data, four partners calculated factors 10 models linear accelerator beams with voltages ranging from 6 MV to 25 MV, including flattening-filter-free (FFF) beams. software used calculations were EGSnrc...
This paper summarizes the results of an intercomparison on use ICRP Reference Computational Phantoms with radiation transport codes, which was organized by EURADOS working group 6. Three exercises are described: exposure to anterior-posterior (AP) photon point source, AP neutron and two typical medical X-ray examinations. The three received 17, 8 solutions, respectively. Participants originated from fifteen different countries, used a wide range Monte Carlo codes. Due difficulties in...
EURADOS Working Group 6 has organized an intercomparison exercise on the use of ICRP Reference Computational Phantoms with radiation transport codes. This paper summarizes results a specific task from modelling internal sources. The quantities to be calculated were absorbed fractions and for monoenergetic photon electron sources as well S-values two radionuclides in four source organs. Twelve participants eleven countries participated this using Monte Carlo codes FLUKA, Geant4, MCNP code...
Clinical dosimetry is typically performed using ion chambers calibrated in terms of absorbed dose to water. As primary measurement standards for this quantity low and medium energy x-rays are available only since a few years, most protocols photon range still based on air kerma calibration. For that reason, data beam quality correction factors [Formula: see text], necessary the application water protocols, scarce literature. Currently international IAEA TRS-398 Code Practice under revision...
Electron emission spectra of a thin gold foil after photon interaction were measured over the energy range between 50 eV and 9500 to provide reference data for Monte Carlo radiation-transport simulations. Experiments performed with HAXPES spectrometer at PETRA III high-brilliance beamline P22 DESY (Hamburg, Germany) energies just below above each L-edges, i.e., 11.9 keV, 12.0 13.7 13.8 14.3 14.4 keV. The analyzed obtain absolute values particle radiance emitted electrons per incident flux....
Human populations and natural ecosystems are bound to be exposed ionizing radiation1from the deposition of artificial radionuclides resulting from nuclear accidents, devices2or radiological dispersive devices ("dirty bombs"). On other hand, NORM industries such as3phosphate production or uranium mining, contribute on site storage residuals with enhanced4concentrations radionuclides. Therefore, in context European agreements5concerning energy, namely EURATOM (European Atomic...
In Targeted Radionuclide Therapy (TRT), the continuous technological effort in imaging tumor phenotypes (i.e. sub-volumes with different phenotypic characteristics) and precise radiopharmaceutical tumor-targeting, is allowing for a better dosimetric optimization at phenotype level. The aim of this study was to evaluate efficiency (considering strategic absorbed dose delivery phenotypes) personalized TRT directed phenotypes.The assessment performed using four-phenotype realistic model...
Electron emission spectra of a thin gold foil after photon interaction were measured over the energy range between 50 eV and 9500 to provide reference data for Monte Carlo radiation-transport simulations. Experiments performed with HAXPES spectrometer at PETRA III high-brilliance beamline P22 DESY (Hamburg, Germany) energies just below above each L-edges, i.e., 11.9 keV, 12.0 13.7 13.8 14.3 14.4 keV. The analyzed obtain absolute values particle radiance emitted electrons per incident flux....