normal 0 false false false en-us x-none fa background: the angular dependency of response for tld cards may cause deviation  from its true value on the results of environmental dosimetry, since tlds may  be exposed to radiation at different angles of incidence from the surrounding area. objective: a 3d setting of tld cards has been calibrated isotropically in a standard  radiation field to eval...

As of October 1996 there are more than 90 radiation-contaminated steel supported rebar buildings (containing more than 1000 apartments) dispersed in the northern part of Taiwan. These apartments were contaminated with cobalt-60 at a total activity ranging from 1-140/tSv/yr. In this paper, a method is developed for evaluating external dose equivalent and dose equivalent rates encountered by the ...

Chest X-ray is one the most frequently required diagnostic procedures used in clinical practice to produce an image of organs, tissues and bones body with a significant impact on collective dose. However, radiation dose received by patients from this procedure likely show large variations within among radiodiagnostic centres. This could be traced lack imaging protocols local or national referen...

In the present work, twelve inorganic thermoluminescence dosimeteric (TLD) materials doped with some rare earth elements (LiF:Sm, LiBaP 2 O 7 :Eu, CaCO 3 CaSO 4 :Dy, SrSO :Sm, CdSO BaSO Li B MgB :Gd, Al MgAl :Ce and LiCaAlF 6 :Eu) three organic TLD (C H NO , C 8 BaO ) were selected for comparative analysis on basis of different photon sensing parameters. About nine parameters viz. mass attenuat...

The European Directive 96/29/EURATOM and adapted national regulations on radiation protection are claiming new limits of radiation exposure and the introduction of new measuring quantities. Dosimeters for area monitoring of penetrating X-ray and gamma radiation have to measure the ICRU operational quantity ambient dose equivalent, H*(10). In this paper, the development stages of a passive H*(10...

Introduction: In patients with thyroid carcinoma, radiation absorbed doses of the thyroid and surrounding tissues is important to weigh risk and benefit considerations. In nuclear medicine, the accuracy of absorbed dose of internally distributed radionuclides is estimated by different methods such as MIRD and direct method using TLD. The aim of this study is using TLD and a phantom to determine...

BACKGROUND A novel radioactive 125I seed-loaded biliary stent has been used for patients with malignant biliary obstruction. However, the dosimetric characteristics of the stents remain unclear. Therefore, we aimed to describe the dosimetry of the stents of different lengths - with different number as well as activities of 125I seeds. METHODS The radiation dosimetry of three representative ra...

PURPOSE In 2008, a national intensity modulated radiation therapy (IMRT) dosimetry intercomparison was carried out for all 23 radiation oncology institutions in Switzerland. It was the aim to check the treatment chain focused on the planning, dose calculation, and irradiation process. METHODS A thorax phantom with inhomogeneities was used, in which thermoluminescence dosimeter (TLD) and ioniz...