Conveners
09 Environmental and Medical Sciences
- Francesco D'ERRICO (Universitร di Pisa, Italy)
- Hervรฉ TOUBON (Orano Mining)
09 Environmental and Medical Sciences
- Malcolm JOYCE (Lancaster university )
- Anatoly ROZENFELD (University of Wollongong, Australia)
09 Environmental and Medical Sciences: Parallel Intensive Oral Sessions
- Michel CARETTE (Aix Marseille Univ, Universitรฉ de Toulon, CNRS, IM2NP, Marseille, France)
- Laurent FRANCIS (UCLouvain, Belgium)
09 Environmental and Medical Sciences
- Cinzia DA VIA (University of Manchester)
- Jean-Pierre CHAUVIN (CEA, France)
Description
Oral Session
High-resolution X-ray imaging techniques, usually known as micro-radiography and micro-CT, have become highly required and frequently used tools for biology, biomedical and pre-clinical research. State-of-the-art micro-CT scanners are capable of achieving spatial resolution of few micrometers or even less thanks to the constant development of compact micro-focus X-ray sources with simultaneous...
The Wearable PET (WPET) project was successfully supported by EU-ATTRACT (https://attract-eu.com). Its objective is to demonstrate the feasibility of a light PET systems for cancer preventive screening which can be hosted by wearable vest.
Positron Emission Tomography or PET is a very precise imaging modality commonly used in hospital oncology units to test patients with cancer to establish...
Treatment verification is expected to improve targeting precision in particle therapy. A promising technique to achieve this goal is the detection of prompt gamma rays emitted along the particle tracks inside the patient. The range of the particle beam can be inferred by determining the time distribution of these gamma-rays relative to the radio frequency of the accelerator, a method commonly...
Particle therapy constitutes a promising and rapidly developing method in modern cancer treatment. In order to exploit its full potential, however, it requires detailed dose verification.
Although the applicability of in-beam positron emission tomography and prompt gamma rays has already been demonstrated in patients, range verification is not yet part of the clinical routine in particle...
The CORSAIR (Cloud Oriented Radiation Sensor for Advanced Investigation of Rocks) project was born to meet the EU guidelines 2013/59/EURATOM and now the Italian legislation decree D.Lgs.101/2020 on safety standards for protection against ionizing radiations.
With this project there is a specific focus on the detection of the NORM (Naturally Occurrence Radioactive Materials) contribute coming...
This presentation stems from a thesis project in progress, leading to a unique multi detectors Bonner sphere. Neutron spectrometers like Bonner spheres have been studied and developed for more than 60 years for astrophysics and radiological protection applications. In particular, in radiological protection, it is a crucial challenge to determine the initial energy of the incident neutrons with...
In this paper, an approach based on a semiconductor radiation detector exhibiting a matrix organization coupled with the use of rings oscillators for current detection is developed. This approach is based on the reading of the information related to indirect output parameters of the detection chain instead of directly measuring the current from the sensor. This solution is interesting because...
Radon is the most important radioactive noble gas existing in nature. It belongs to the radioactive decay chains of 238U and 232Th. As an inert gas, radon, and in particular the long-lived isotope, 222Rn (T1/2 = 3.82 day), has high mobility and can easily escape from materials containing traces of Uranium. For low energy and low counting rate experiment in particle and astroparticle physics...
Proton therapy is a cancer treatment technique that allows for a more selective application of dose to tumors in comparison with conventional radiotherapy with X- or $\gamma$-rays. This is due to the fact that higher dose is concentrated in the region where the protons stop, whereas far less dose is deposited in the traversed tissue. In this context, a system of imaging and dose verification...
Radionuclide concentrations in the soil depend on the geological and anthropogenic activities of an area. They influence level of gamma radiation in the environment, which can cause significant health risk in humans. Due to the non-uniform distribution of radionuclides in the soil, various measurement methods have been adopted to monitor our environment. The challenges involved in collecting...
Measurements of trace levels of environmental radioactivity, made with a broad energy germanium (BEGe) detector, for trace actinide (241Am) analysis of soils from the shores of two lakes in the English Lake District, UK, are described. In particular, the need to determine the radioactive concentration (Bq/g) in the soil samples with the intent being to discern natural and anthropogenic...
The detection of prompt gamma-rays exiting the patient during hadron therapy treatments could provide a way to achieve online range verification, which in turn would represent a key step in tumor oncology. However, the desired detector must be able to image gamma-rays from an large source and a broad spectrum in the few MeV region, while dealing with low statistics and low signal to noise...
Naturally occurring radioactive materials NORM are materials which may contain any of the primordial radionuclides or radioactive elements as they occur in nature, such as radium, uranium, thorium, potassium and their radioactive decay products, that are undisturbed as a result of human activities. furthermore, the technologically enhanced NORM, TENORM are generated in the form of by-products,...
Many dosimetric measurement systems are not suitable for the application in pulsed radiation fields regarding radiation protection scenarios. Even in a low mean dose rate in the range of 1 ยตSv/h. A main challenge is to process high detector loads within short time periods, while an appropriate dead time behavior and the suppression of pile up effects must be ensured.
A promising approach for...
In this work, the concept of an area monitoring dosimeter and its operational regime for pulsed radiation dose rate measurements is presented.
A fast tissue equivalent plastic scintillator EJ-200 (Eljien Technology) is exploited as a detector material. In the energy range from 200 keV up to 4 MeV, the scintillator is tissue equivalent. This minimizes the influence of pile-up on absorbed...
Nanodosimetry is a relatively young research field which could help provide a more thorough understanding of how radiation interacts with cells. The nanodosimeters currently available are unfit for clinical use, due to their large size. The aim of this project is the development and characterization of a portable nanodosimeter.
It is known that how radiation interacts with cells is...
The development of new PET (Positron Emission Tomography) scanners with improved performance is still an important line of research in nuclear medicine. One current line of research in nuclear medicine is the study of a total-body scanner, the development of which would represent an improvement on the current features of PET scanners. Currently, the typical spatial resolution of the...
Radiopharmaceuticals are drugs containing radionuclides and are routinely used in nuclear medicine for diagnosis or therapy of different diseases, mainly cancer. The main difficulties for nuclear medicine to assume a wider role in clinical practice are the availability of diagnostic/therapeutic isotopes and a technique for their specific localization in diseased sites.
The radionuclides of...
ClearMind project aims to develop a fast detection module for TOF-PET.
We propose a position-sensitive detector consisting of a monolithic PbWO${_4}$ scintillating crystal on which is directly deposited a bialkali photoelectric layer. This detector optimizes the transmission of light photons to the photoelectric layer. Photons are generated by two processus : the Cherenkov effect and the...
Whole gamma imaging (WGI) is our new imaging concept which combines PET and Compton imaging. By inserting a scatterer detector ring into a PET ring, two different modalities can be evaluated on the same platform. We developed a WGI prototype and demonstrated Compton imaging of 909 keV photons emitted from a 89Zr-injected mouse. While Compton imaging can avoid theoretical limitation...
