This work investigated the suitability of passive dosimeters for reference dosimetry in small fields with acceptable accuracy. Absorbed dose to water rate was determined in nine small radiation fields with diameters between 4 and 35 mm in a Leksell Gamma Knife (LGK) and a modified linear accelerator (linac) for stereotactic radiosurgery treatments. Measurements were made using Gafchromic film (...

Background and Aim: Due to the increasing number of radiographic tests, TLD dosimeters can be used to measure the effective dose of critical organs in various radiographic tests. In this research, the progression of analogue to digital radiology devices, which facilitates and accelerates the performance of radiographs, especially emergency patients, was investigated, and then the effective dose...

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 ...

This work evaluated the Hp(10)dose for the personnel exposed in mixed field inside several locations of reactor 1 building at Cernavoda NPP. In order to achieve this we used active (EPD N2 and DMC 2000GN) and passive (TLD 8806) personnel dosimeters and one ambient neutron monitor for H*(10) evaluation. The dose correction coefficients vary from one room to another depending on the neutron spect...

Introduction: Organ dose estimation using thermoluminescence dosimeter (TLD) is known to be a standard, although many other methods, such as simulation software, optically stimulated luminescent dosimeters, and photodiodes are still in use. This study aimed at directly measuring mean organ doses to the selected organs in the head/neck, chest, and abdominal regions from four computed tomography ...

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...

Introduction: Increasing in refer to computed tomography (CT-scan) imaging causes to increase in cumulative dose. Stereoradiography (EOS) is an X-ray imaging technology that, by eliminating scattering radiation, reduces patient's absorption dose and improves image quality.   Materials and Methods: This cross-sectional study was carried out in a hosp...