UNLABELLED 18F-labeled 2 beta-carbomethoxy-3beta-(4-chlorophenyl)-8-(-2-fluoroethyl)nortropane ([18F]FECNT) is a recently developed dopamine transporter ligand with potential applications in patients with Parkinson's disease and cocaine addiction. METHODS Estimates of the effective dose equivalent and doses for specific organs were made using biodistribution data from 16 Sprague-Dawley rats a...

Radiation exposure dosimetry for the personnel is based on measurements of phantom studies. To determine effective dose values for different X-ray equipment, TLD-measurements were performed using an Alderson Phantom in the patient position and a second phantom in the typical position of the personnel. Various types of protective clothing as well as fixed shields were considered in the calculati...

A new method was developed based on calculating the ahsorption coefficients, selfabsorption coefficients and transmission coefîlcients of the gamma-photons emitted by different radioisotopes for evaluating gamma dose equivalent rates, at 1 meter from varions cylindrical radioactive solution sources utilized in medicine, in a biological tissue. Resnlts obtained were compared with data given in l...

Background: Neutron contamination in our environment can cause harmful biological effects on human body. Therefore, many efforts have been made to construct a neutron dosimeter to estimate the received dose. Objective: To design a simple neutron dosimeter. Methods: The primary dosimeter had 3He as a spherical thermal neutron detector encircled by paraffin 10 cm in radius. Then, the paraffin sph...

Fenvalerate is a synthetic pyrethroid , widely used due to its high effective and low mammalian toxicity. Fenvalerate, dose equivalent to LD25 was administered orally for acute exposure and dose equivalent to LD5 for subchronic & chronic exposure to Wistar rats. Toxic effect of Fenvalerate observed in serum Lypase, alanine aminotransferase (ALT), aspartate aminotransferase (AST), Cholinesterase...

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, ...