A survey of the literature was conducted to establish the anticipated ranges of exposure to both physicians and patients during cardiac catheterization. A brief explanation of a technic for using time-lapse photography and a computer model for exposure calculation is presented. The thermoluminescent dosimeter (TLD) results used as controls for exposure values calculated by the developed techniq...

Interventional procedures in radiology and cardiology are associated with high dose to the patient. Accurate dosimetry is essential calibration of equipment a means provide necessary accuracy assessment. The objective this work investigate performance dosimeters used interventional different standard non-standard X-ray radiation qualities, potential uncertainties related measurements, thus impr...

The increasing use of (sealed and nonsealed) beta radiation sources in medicine, industry and research implies the necessity of a metrologically reliable dose measurement in workers exposed to this type of radiation. The value of dose limits to be determined for occupational exposure in beta radiation fields is the equivalent dose on 1 cm2 of the evaluated skin, independently from the radiation...

In preparing of thermoluminescent dosimeters (TLD) it is common to use as agglutinator the polytetrafluoroethylene (PTFE), called Teflon. In this paper the physical, morphological and dosimetric characteristics of Teflon were evaluated aiming its application in thermoluminescent dosimetry. The differential thermal analysis (DTA) and thermogravimetry (TG) results showed that the Teflon glass tra...

Abstract Thermoluminescent (TL) dosimeters are the most used, since they can store information, due to exposure radiation. Rare earth doped lanthanum aluminate (LaAlO 3 ) ceramic has attracted great attention in recent years for many applications because it shows excellent properties such as thermal stability, color light emission well high thermoluminescent intensity. In present work, TL glow ...

introduction: radiotherapy is a common treatment modality for patients with head and neck malignancies. as the nose lies within the field of radiotherapy of the head and neck, the olfactory fibers and olfactory receptors may be affected by radiation. the aim of this study was to evaluate changes in olfactory threshold in patients with head and neck malignancies who have received radiation to th...

Introduction: In recent years, the number of computed tomography (CT) scans, which is a high-dose technique, has increased significantly. Head and neck CT is performed frequently and thyroid, particularly in children, has always been considered a sensitive organ. In recent years, radiobiologists and health physicists have been more concerned about the safety of lenses of the eyes, as cataract i...