A new approach to the determination of anatomical cross-sections of the body by Compton scattering of gamma-rays

1971 ◽  
Vol 16 (4) ◽  
pp. 577-586 ◽  
Author(s):  
F T Farmer ◽  
M P Collins
Keyword(s):  
Compton Scattering ◽  
Gamma Rays ◽  
Cross Sections ◽  
The Body ◽  
New Approach

Determination of photoneutron cross sections for [sup 197]Au by using laser inverse-Compton scattering gamma-rays

2010 ◽  
Author(s):  
O. Itoh ◽  
H. Utsunomiya ◽  
H. Akimune ◽  
T. Yamagata ◽  
M. Kamata ◽  
...  
Keyword(s):  
Compton Scattering ◽  
Gamma Rays ◽  
Cross Sections ◽  
Inverse Compton Scattering ◽  
Inverse Compton

Gender determination of caucasoid hair using image analysis

1993 ◽  
Vol 51 ◽  
pp. 216-217
Author(s):  
T.B. Ball ◽  
W.M. Hess
Keyword(s):  
Image Analysis ◽  
Cross Sections ◽  
Scalp Hair ◽  
The Body ◽  
Equivalent Diameter ◽  
Cross Sectional ◽  
Hair Samples ◽  
Length Width ◽  
Morphological Differences

It has been demonstrated that cross sections of bundles of hair can be effectively studied using image analysis. These studies can help to elucidate morphological differences of hair from one region of the body to another. The purpose of the present investigation was to use image analysis to determine whether morphological differences could be demonstrated between male and female human Caucasian terminal scalp hair.Hair samples were taken from the back of the head from 18 caucasoid males and 13 caucasoid females (Figs. 1-2). Bundles of 50 hairs were processed for cross-sectional examination and then analyzed using Prism Image Analysis software on a Macintosh llci computer. Twenty morphological parameters of size and shape were evaluated for each hair cross-section. The size parameters evaluated were area, convex area, perimeter, convex perimeter, length, breadth, fiber length, width, equivalent diameter, and inscribed radius. The shape parameters considered were formfactor, roundness, convexity, solidity, compactness, aspect ratio, elongation, curl, and fractal dimension.

scholarly journals Determination of coherent to Compton scattering differential cross section ratios of some inorganic materials with EDXRF

2017 ◽  
Vol 95 (4) ◽  
pp. 407-411 ◽  
Author(s):  
D. Yılmaz ◽  
Ü. Şimşek ◽  
T. Akkuş ◽  
Y. Şahin
Keyword(s):  
Differential Cross Section ◽  
Compton Scattering ◽  
Cross Section ◽  
Gamma Rays ◽  
Differential Cross ◽  
Hpge Detector ◽  
Inorganic Materials ◽  
Gamma Detector ◽  
Intensity Ratios

In this study, we aimed to determine coherent to Compton scattering differential cross section ratios of some inorganic materials (BaSO4, CaF2, Mg2SiO4, MgSO4, and ZnSO4(7H2O)) for several scattering angles (95°, 105°, 115°, 125°, and 135°). Coherent to Compton scattering differential cross section ratios were investigated experimentally by using an HPGe detector, which has a resolution of 199.6 eV at the 5.9 keV. The samples were excited with 59.54 keV gamma rays emitted from Am241 point source. The intensity ratios were corrected due to the photopeak efficiency of the gamma detector and absorption of photons in the target and air. It is observed that coherent to Compton scattering differential cross section ratios decrease with increasing scattering angle.

scholarly journals GEANT4 Study of Proton–Body Interactions

2021 ◽  
Vol 8 (2) ◽  
pp. 121-127
Author(s):  
J. A. López ◽  
S. S. Romero González ◽  
O. Hernández Rodríguez ◽  
J. Holmes ◽  
R. Alarcon
Keyword(s):  
Gamma Rays ◽  
Full Width Half Maximum ◽  
Gamma Ray ◽  
Body Part ◽  
Maximum Energy ◽  
The Body ◽  
Proton Collision ◽  
Maximum Height ◽  
Full Width

Proton therapy uses a beam of protons to destroy cancer cells. A problem of the method is the determination of what part of the body the protons are hitting during the irradiation. In a previous study we determine that by capturing the gamma rays produced during the irradiation one can determine the location of the proton-body interaction, in this work we investigate if by examining the gamma rays produced it is possible to determine the body part that produced the gamma rays by the proton collision. This study uses GEANT4 computer simulations of interactions of proton-tissue, protonbrain, proton-bone, etc., which produce gamma rays, to determine the characteristics of the gamma rays produced. We then analyze the characteristics of the gamma rays to find signatures that could be used to determine the source of the rays. In particular, we study the distribution of gamma ray energies, their full-width half-maximum, energy resolution, maximum height, and total number of counts. This study concludes that it is possible to use the gamma ray spectra to determine what body part produced it.

scholarly journals A new approach to studying the autoxidation of adrenaline: possibility of the determination of superoxide dismutase activity and the antioxidant properties of various preparations by polarography

2012 ◽  
Vol 58 (1) ◽  
pp. 77-87 ◽  
Author(s):  
T.V. Sirota
Keyword(s):  
Reactive Oxygen Species ◽  
Superoxide Dismutase ◽  
Oxygen Consumption ◽  
Antioxidant Properties ◽  
Chemical Compounds ◽  
The Body ◽  
Oxygen Species ◽  
New Approach ◽  
Rate Of Oxygen Consumption

The reaction of adrenaline autoxidation in an alkaline buffer with the formation of superoxide radicals and the product of its oxidation, adrenochrome, which models the quinoid pathway of adrenaline conversion in the body, is accompanied by oxygen consumption. This reaction is applicable for polarographic determination of the activity of superoxide dismutase and the antioxidant properties of biological and chemical compounds, it is based on evaluation of the latent period and the rate of oxygen consumption, which are measured in the presence of the compounds examined. It was assumed that the neuro- and cardiotoxicity of quinone products of adrenaline oxidation is related not only to their "own" properties and reactive oxygen species formed but also the hypoxia of those regions of the cell and tissue where the quinoid oxidation of adrenaline occurs.

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