A5001647567- Radiation Dose and Imaging
- Advanced X-ray and CT Imaging
- Advanced Radiotherapy Techniques
- Digital Radiography and Breast Imaging
- Science and Education Research
- Medical Imaging Techniques and Applications
- AI in cancer detection
- Radiology practices and education
- Graphite, nuclear technology, radiation studies
- Colorectal Cancer Treatments and Studies
- Radiation Detection and Scintillator Technologies
- Orthopaedic implants and arthroplasty
- Heavy Metal Exposure and Toxicity
- Youth, Drugs, and Violence
- Nanoparticles: synthesis and applications
- Metal Alloys Wear and Properties
- Colorectal and Anal Carcinomas
- Education and Digital Technologies
- Nuclear and radioactivity studies
- Radioactive contamination and transfer
- Metastasis and carcinoma case studies
- Radiation Therapy and Dosimetry
- Healthcare Regulation
- Gastric Cancer Management and Outcomes
- Maternal and Neonatal Healthcare
Centro Hospitalar de Lisboa Ocidental
2022-2023
University of Lisbon
2015-2022
National Institute of Health Dr. Ricardo Jorge
2022
Portuguese Environment Agency
2021
Instituto Superior Técnico
2018-2020
Instituto de Engenharia de Sistemas e Computadores Investigação e Desenvolvimento
2016
The purpose of this study was to evaluate the efficacy needle holders in reducing staff hand exposure during biopsies guided by computed tomography fluoroscopy (CTF), through analysis data acquired a detailed monitoring study, undertaken parallel with an ongoing optimization process reduce irradiation.
The aim of this paper is the characterization four thermoluminescence detectors (TLD), namely, LiF:Mg,Ti, LiF:Mg,Cu,P, Li2B4O7:Mn and Li2B4O7:Cu for measurement entrance surface air kerma (ESAK) estimation mean glandular dose (MGD) in digital mammography examinations at hospitals clinics. Low-energy x-ray beams typical energy ranges mammography, produced with a tungsten target additional 60 µm molybdenum filtration were implemented characterized Laboratory Metrology Ionizing Radiation...
Thermoluminescence dosemeters are widely used in individual and environmental monitoring. The aim of this work was to compare the thermal stability Ext-Rad whole-body card types with LiF:Mg,Ti LiF:Mg,Cu,P detectors stored at different temperatures periods. were 0°C, room temperature 40°C for periods that lasted 8, 30, 45, 90 120 d. In general, TLD-100H present higher TL signal than TLD-100 detectors. intensity remained constant both materials storage 0°C. At RT same results observed...
Computed tomography fluoroscopy (CTF) is a useful imaging technique to guide biopsies, particularly lung but it also has the potential for very high hand exposures, despite use of quick‐check method and needle holders whenever feasible. Therefore, reliable monitoring crucial ensure safe CTF. This challenge, because ring dosimeters monitor exposure only at base one finger, while fingertips may be exposed highly collimated CT beam. In this work we have explored possibility using Gafchromic...
The aim of this work is to present the methods in use for environmental dose assessment with passive detectors at Campus Tecnológico e Nuclear (CTN) Instituto Superior Técnico, Portugal. are based on LiF:Mg,Ti (TLD-100) inserted Harshaw holders placed four locations and exchanged a quarterly basis. An initial group measurements allowed estimation time interval necessary attain stable value, determination fading factor, as well calculation method ambient equivalent rate.
In this work, the initial results of type testing LiF:Mg,Cu,P (TLD-100H) whole-body personal dosemeters are presented. An assessment reproducibility, linearity response, residual signal as a function dose, energy and angular dependence response was performed. general, show good reproducibility for different dose values linear behaviour range between 0.1 300 mSv. The detection limits obtained lower than 50 μSv. system presents radiation qualities.