Introduction: Active personal dosimeters (APDs) are well accepted as useful and reliable instruments for individual dosimetry measurements. APDs have many advantages compared with passive dosimeters for individual external radiation dose assessments. In routine monitoring, occupational exposure is carried out for verification and demonstration of compliance with the regulatory dose limits. So, ...

The fading of radiation-sensitive p-channel metal-oxide-semiconductor field-effect transistors (known as RADFETs or pMOS dosimeters) over a long time period 10 years after irradiation has been investigated. Fading is, in addition to sensitivity, another characteristic radiation dosimeters. It is considered the recovery threshold voltage irradiated dosimeters during ambient annealing without gat...

Background: The number of interventional cardiology procedures performed has increased rapidly over the past years. While these procedures help physicians avoid using highly complicated invasive methods, it usually leads to high levels of exposure to ionizing radiation of both patients and cardiologist. The dose received by the cardiologist during interventional cardiology procedures is determi...

The radiological properties of nanocomposite Fricke gel (NC-FG) dosimeters prepared with different concentrations of nano-clay, perchloric acid and ferrous ions in deaerated conditions were investigated under carbon and argon ion beam irradiation covering a linear-energy-transfer (LET) range of 10 to 3000 eV/nm. We found that NC-FG exhibits radiological properties distinct from those of convent...

The paper describes dose response and signal fading of Al-gate p-channel (metal oxide semiconductor field effect transistors) MOSFETs in the range of gamma radiation doses used in radiation therapy. MOSFETs with thicknesses of the gate oxide layer of 1 μm and 400 nm were used. The response was characterized by the threshold voltage shift and was studied as a function of the absorbed dose and ti...

EURADOS (European Radiation Dosimetry Group) Working Group 12 (WG12) SG1 activities are aimed at occupational radiation protection and individual monitoring in X-ray nuclear medicine practices. In recent years, many studies have been carried out these fields, especially for interventional radiology cardiology workplaces (IC/IR). The complexity of the exposure conditions medical staff during pra...

Low intensity beams are generated with a 18 MeV Sband electron linear accelerator at Osaka Prefecture University. The minimum charge of electrons in a pulsed beam is about several aC. Study has been made to establish the methods for measuring the intensity and the spatial profile of the beam at electron charges of a beam in aC to pC regions. In pC region a beam monitor using a charge-sensitive ...

The Brazilian legislation has only established diagnostic reference levels (DRLs) in terms of Multiple Scan Average Dose (MSAD) as a quality control parameter for computed tomography (CT) scanners. Compliance with DRLs can be verified by measuring the Computed Tomography Kerma Index (Ca,100) with a pencil ionization chamber or by obtaining the kerma distribution in CT scans with radiochromic fi...