Objective(s): The purpose of this research is to study the effect of beta spectrum on absorbed fraction ( ) and to find suitable analytical functions for beta spectrum absorbed fractions in spherical and ellipsoidal volumes with a uniform distribution for several radionuclides that are commonly used in nuclear medicine.Methods: In order to obtain the beta particle absorbed fraction, Monte Carlo...

abstract background: were made each week during year 2002 from samples of atmospheric aerosols filtered from theair at tehran nuclear research center.measurement of gross beta activities and cosmogenic beryllium-7 concentrationsmaterials and methodssampler at the nuclear research center meteorological station in tehran (40contents of samples were determined with semiconductor gamma spectrometry...

Cherenkov Radiation (CR), this blue glow seen in nuclear reactors, is an optical light originating from energetic β-emitter radionuclides. CR emitter 90Y triggers a cascade of energy transfers in the presence of a mixed population of fluorophores (which each other match their respective absorption and emission maxima): Cherenkov Radiation Energy Transfer (CRET) first, followed by multiple Först...

It is estimated that bone loss occurs in 70 % of all patients dying from cancer, causing a significant disease burden in cancer patients. Bone loss is caused by cancer itself and its metastases, but also by cancer therapies. Of the cancer therapy-induced bone loss, hormone therapies are best known for their bone damaging abilities. However, chemo- and radiotherapy may result in bone loss too. I...

Auger electron emitting radionuclides in cancer therapy offer the opportunity to deliver a high radiation dose to the tumor cells with high radiotoxicity while minimizing toxicity to normal tissue. We have in this study identified the Auger emitter Sb119 as a potent nuclide for targeted radionuclide therapy based on theoretical dosimetry calculations at a subcellular scale. From these calculati...

Background: The formalism recommended by Task Group 60 (TG-60) of the American Association of Physicists in Medicine (AAPM) is applicable for β sources. Radioactive biocompatible and biodegradable 153Sm glass seed without encapsulation is a β- emitter with a short half life and delivers a high dose rate to the tumor in the millimeter range. In this work the dosimetry parameters of the ...

In the past several years there has been a growing interest in the development of radiopharmaceuticals labeled with metallic radionuclides (1). Of particular interest is the positron emitter Cu (t1⁄2 = 12.7 h) for molecular imaging of small molecules as well as peptides and antibodies (2). This has led us to the recent implementation of a solid target production facility using commercially avai...

Results of research absorbed dose rate dependence on distance and positioning accuracy standard dosimetric beta-radiation sources at the new AT200 calibration facility (by ATOMTEX SPE) are presented. The non-uniform profile fields created by with strontium-90 + yttrium-90, krypton-85 promethium-147 radionuclides under conditions as specified in ISO/DIS 6980-2:2021(E) international was investiga...

Over the past few decades, level of radiation has significantly increased due to artificial sources – radionuclides. In particular, Chernobyl accident led release about 50 million Кі various types radionuclides into environment. As a result at nuclear power plant in Ukraine, large number territories Zhytomyr region are polluted 50%, Kiev 26%. About 26% contaminated area falls on Chernigov, Rivn...