Characterization of a 60Co unit at a secondary standard dosimetry laboratory: Monte Carlo simulations compared to measurements and results from the literature

Medical Physics
Asa Carlsson TedgrenJan-Erik Grindborg

Abstract

To compare a Monte Carlo (MC) characterization of a 60Co unit at the Swedish Secondary Standard Dosimetry Laboratory (SSDL) with the results of both measurements and literature with the aims of (1) resolving a change in the ratio of air-kerma free in air K(air) and absorbed dose to water D(w) in a water phantom noted experimentally after a source exchange in the laboratory and (2) reviewing results from the literature on similar MC simulations. Although their use in radiotherapy is decreasing, the characteristics of 60Co beams are of interest since 60Co beams are utilized in calibrating ionization chambers for the absolute dosimetry of radiotherapy beams and as reference radiation quality in evaluating the energy dependence of radiation detectors and in studies on radiobiological effectiveness. The BEAMnrc MC code was used with a detailed geometrical model of the treatment head and two models of the 60Co source representing the sources used before and after source exchange, respectively. The active diameters of the 60Co sources were 1.5 cm in pellet form and 2.0 cm in sintered form. Measurements were performed on the actual unit at the Swedish SSDL. Agreement was obtained between the MC and the measured results within the estim...Continue Reading

References

Nov 1, 1977·Physics in Medicine and Biology·W H Sutherland, C W Smith
May 1, 1987·Medical Physics·K HanR Mohan
May 1, 1995·Medical Physics·D W RogersT R Mackie
Dec 10, 1999·Medical Physics·G M MoraD W Rogers
Dec 1, 1964·The International Journal of Applied Radiation and Isotopes·J H AITKEN, W H HENRY
Feb 1, 1962·Acta Radiologica·S HULTBERGR WALSTAM
Apr 9, 2004·Physics in Medicine and Biology·B Teimouri Sichani, M Sohrabpour
Apr 11, 2006·Radiation Protection Dosimetry·R MiróG Verdú
May 16, 2006·Medical Physics·R MinnitiUNKNOWN Radiation Interactions and Dosimetry Group of the Ionizing Radiation Division, National Bureau of Standards
May 22, 2008·Medical Physics·G IbbottJ F Williamson
Jan 1, 2003·Journal of Research of the National Institute of Standards and Technology·Stephen M Seltzer, Paul M Bergstrom

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
Ana P PeriniLinda V E Caldas
Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
Lucio P NevesLinda V E Caldas
© 2021 Meta ULC. All rights reserved