Dosimeters Articles

  • Gold nanoparticles as a sensitising agent in external beam radiotherapy and brachytherapy: a feasibility study through Monte Carlo simulation

    In recent years, gold nanoparticles (GNP) have been proposed as sensitising agents in radiotherapy. Several studies, performed both through Monte Carlo simulation of dosimetric and microdosimetric enhancement in presence of GNPs and through in–vitro experiments, have clearly shown the powerfulness of such a technique in radiotherapy. Aim of the present work is to estimate the dose enhancement ...


    By Inderscience Publishers

  • Performance of some handheld dosimeters used for gamma–ray ambient dose rate measurements

    A study was carried out on the performance of some handheld dosimeters that are used for measuring ambient gamma dose rates. A CsI scintillation–based and two GM–based dosimeters were used to measure the absorbed dose rates in an indoor environment, inside a lead shield, on different floors of a building, in a desert environment and in a boat on the Arabian Gulf. The study showed that while some ...


    By Inderscience Publishers

  • Evaluation of occupational radiation exposure of cardiologists in interventional radiography in Mashhad CATHLABs

    Several studies have revealed that interventional radiography procedures performed in cardiology departments are high dose techniques. In this study, effective dose of cardiologists working in hospitals Catheterisation Laboratories (CATHLABs) in Mashhad city have been measured during Coronary Angiography (CA) and Percutaneous Transluminal Coronary Angioplasty (PTCA) procedures. In order to ...


    By Inderscience Publishers

  • Dosimetry analysis of two new design 103 Pd interstitial brachytherapy sources

    With increased demand for low 103 Pd (palladium) seed sources, to treat prostate and eye cancers, new sources have been designed and introduced. This paper presents the two new palladium brachytherapy sources, IR03- 103 Pd and IR04- 103 Pd that have been developed at Agricultural, Medical & Industrial Research School . The dosimetric parameters, such as ...


    By Inderscience Publishers

  • Study of the effect of post-irradiation with low linear energy transfer on optical and spectral response of CR-39 polymeric material

    The optical properties of CR-39 polymer track detectors irradiated with high Linear Energy Transfer (LET) (alpha particles at energies 3.05 MeV and 4.86 MeV) and followed by low LET (gamma ray irradiation at different doses ranging from 0 to 200 kGy) were investigated. The chemical etching was verified for all samples. Also, the optical properties were studied with an Ultraviolet-Visible (UV-VIS) ...


    By Inderscience Publishers

  • Canarina CUSTIC software · noise dosimeters and modeling · introduction 5

    Noises are irregular and disordered vibrations including all possible frequencies. The intensity of a sound I can be expressed in decibels with the standard equation: L=10 log(I/I0) where I0 is the quietest sound most people can hear, the threshold of hearing 10-12Wm-2.  When the ratio is between ...

  • Study of the effect of post-irradiation with low linear energy transfer on optical and spectral response of CR-39 polymeric material

    The optical properties of CR-39 polymer track detectors irradiated with high Linear Energy Transfer (LET) (alpha particles at energies 3.05 MeV and 4.86 MeV) and followed by low LET (gamma ray irradiation at different doses ranging from 0 to 200 kGy) were investigated. The chemical etching was verified for all samples. Also, the optical properties were studied with an Ultraviolet-Visible (UV-VIS) ...


    By Inderscience Publishers

  • Are radiologists and radiological technologists at greater risk of reproductive health problems? Data from seven provinces in Iran

    Many radiation workers believe that occupational exposures have the potential to interfere with their normal reproductive function. In this study, a total of 621 radiation workers (336 females and 285 males) who worked in hospitals/clinics in seven different provinces were randomly selected. All the participants were interviewed and the reports of their previous exposures, as recorded by film ...


    By Inderscience Publishers

  • Development of sintered composites of CaSO4 doped with Dy and Nd

    The main purpose of this work is the development of sintered composites in order to allow their use as thermoluminescence (TL) dosimeters using a simple route to preparation and employing high temperature. The composites were prepared with CaSO4.2H2O doped with Dy2O3 and NdO3. Initially, CaSO4.2H2O was dehydrated in an oven at 100°C for 1 h. After addition of dopants and homogenisation, Polyvinyl ...


    By Inderscience Publishers

  • The definition of low doses and their importance in radiobiology

    The aim of this work is to introduce a new dosimetric approach that is expected to contribute to characterising and distinguishing low, intermediate and high dose ranges. The emphasis will be on the low dose range, owing to the importance of the biological effects at low doses. A Monte Carlo code was used to simulate the energy degradation of photons in water, where the coherent and incoherent ...


    By Inderscience Publishers

  • Radon Levels in Dwellings of New Mirpur Azad Kashmir, Sub-Himalayas, Pakistan

    Radon concentrations were measured in kucha, semi-kucha and pucka houses located on the sedimentary rocks of Early Pleistocene-Pliocene Soan Formation, Pleistocene Mirpur conglomerate and recent deposits. The radon concentration was measured using CN 85 nuclear tracks etch detectors in box type dosimeters installed in the bedrooms and kitchens of the houses. It was found to vary from 14 ± 7 Bqm-3 ...


    By SAGE Publications

  • The Monte Carlo simulation of the TLD response function: scattered radiation field application

    Thermoluminescent Dosimeters (TLDs) have various applications in nonprimary beam dosimetry. The Monte Carlo simulation of the TLD response was done in low energy beams to improve its clinical use in scattered beam dosimetry. The normalised values of the measured quality dependence factors for different X-ray beams were found to be 1.28, 1.24, 1.16, 1.07 and 1.03 for different beam qualities, ...


    By Inderscience Publishers

  • A report of staff overdose during fluoroscopic procedures

    The aim of this study was to determine mean absorbed doses to the stuff working in operation room after renovation and establishing a new X-ray equipment and to find an approach to reduce the absorbed dose to the doctors and nurses in operation room. The source of over exposure was a combination of new equipment and lack of awareness of staff engrossed in their duties.Keywords: staff overdose, ...


    By Inderscience Publishers

  • Improvement of epidemiological data analysis by unbiased estimates of log-normal dose distribution

    The effects of radiation on population and risk assessment are studied through epidemiological studies that are heavily dependent on dose distribution. Radiation doses to individual workers follow a log-normal distribution. Computation of the collective dose with the minimum detectable values (Detection Limit or DL) as zero is biased. Hence the expectation value of the 'missed' doses is computed ...


    By Inderscience Publishers

  • Calibration and characterisation of extremity dosimeters

    The increasing use of radiation in the medical field is providing great advances in health improvement. However, these techniques can generate an increase in the number of professionals exposed to radiation. The Brazilian authorities (Brazilian Nuclear Energy Commission ? CNEN) have imposed the monitoring of specific body parts of professionals. One of these obligations is the monitoring of the ...


    By Inderscience Publishers

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