PMID: 840195Jan 1, 1977

Composition of A-150 tissue-equivalent plastic

Medical Physics
J B SmathersL J Goodman

Abstract

In recent years, the use of tissue-equivalent materials has become quite common in fast-neutron dosimetry, with the A-150 plastic developed by Shonka et al. probably the most popular. Information on this specific plastic is scantily reported in the literature and as a consequence a preponderance of authors unknowingly reference an article by Shonka describing an early version of a tissue substitute plastic but having a different elemental composition than the present A-150 formulation. We have reviewed the results of 21 chemical analyses which have occurred over a time span of four years on a total of 14 samples of A-150 plastic and based on these data and the formulation of the plastic, have arrived at a suggested composition for A-150 tissue-equivalent plastic. The ambiguities of water absorption by nylon, one of the components of the plastic, and the uncertainty this reflects in the composition of the plastic were evaluated.

Citations

Jan 1, 1977·International Journal of Radiation Oncology, Biology, Physics·H R WithersJ B Smathers
Mar 1, 1982·The British Journal of Radiology·C Constantinou
Sep 1, 1981·International Journal of Radiation Biology and Related Studies in Physics, Chemistry, and Medicine·P D HigginsM N Gould
Jul 1, 1978·International Journal of Radiation Oncology, Biology, Physics·H R WithersD H Hussey
Dec 29, 2000·Medical Physics·J BurmeisterL Wielopolski
Apr 9, 2004·Medical Physics·Indra J Das, Timothy C Zhu
Apr 1, 1997·Medical Physics·Wayne D Newhauser, H J Brede
May 1, 1980·Physics in Medicine and Biology·M Awschalom, F H Attix
Jan 1, 1980·Physics in Medicine and Biology·S R Domen
Jan 1, 1980·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·R A Chapman, C R Harris
Jul 1, 1978·Physics in Medicine and Biology·G K LamR W Harrison
Jul 1, 1978·Physics in Medicine and Biology·L J Goodman
Apr 1, 1988·Physics in Medicine and Biology·H J BredeA Ostrowsky
Sep 1, 1981·Physics in Medicine and Biology·M Kristensen, L Sundbom
Sep 1, 1978·Physics in Medicine and Biology·P M DeLucaC A Kelsey
Mar 1, 1996·Physics in Medicine and Biology·M Säbel, H Aichinger
Apr 14, 2016·Journal of Applied Clinical Medical Physics·Juergen MeyerGeorge A Sandison

Related Concepts

Fast Neutrons
Neutrons
Supramid
Plastics
Radiotherapy Dosage
Trace Elements

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.

Neural Activity: Imaging

Imaging of neural activity in vivo has developed rapidly recently with the advancement of fluorescence microscopy, including new applications using miniaturized microscopes (miniscopes). This feed follows the progress in this growing field.

The Tendon Seed Network

Tendons are rich in the extracellular matrix and are abundant throughout the body providing essential roles including structure and mobility. The transcriptome of tendons is being compiled to understand the micro-anatomical functioning of tendons. Discover the latest research pertaining to the Tendon Seed Network here.

Myocardial Stunning

Myocardial stunning is a mechanical dysfunction that persists after reperfusion of previously ischemic tissue in the absence of irreversible damage including myocardial necrosis. Here is the latest research.

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.

Incretins

Incretins are metabolic hormones that stimulate a decrease in glucose levels in the blood and they have been implicated in glycemic regulation in the remission phase of type 1 diabetes. Here is the latest research.

Chromatin Regulation and Circadian Clocks

The circadian clock plays an important role in regulating transcriptional dynamics through changes in chromatin folding and remodelling. Discover the latest research on Chromatin Regulation and Circadian Clocks here.

Long COVID-19

“Long Covid-19” describes illness in patients who are reporting long-lasting effects of the SARS-CoV-19 infection, often long after they have recovered from acute Covid-19. Ongoing health issues often reported include low exercise tolerance and breathing difficulties, chronic tiredness, and mental health problems such as post-traumatic stress disorder and depression. This feed follows the latest research into Long Covid.

Spatio-Temporal Regulation of DNA Repair

DNA repair is a complex process regulated by several different classes of enzymes, including ligases, endonucleases, and polymerases. This feed focuses on the spatial and temporal regulation that accompanies DNA damage signaling and repair enzymes and processes.