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The effective atomic number of dosimetric gels

Australasian Physics & Engineering Sciences in Medicine, 2008
Radiological properties of gel dosimeters and phantom materials are often compared against each other and against water or tissue by consideration parameters including their effective atomic number, Zeff. Effective atomic numbers have been calculated for a range of ferrous-sulphate and polymeric gel dosimeters using mass attenuation coefficient data ...
Taylor, M, Franich, Rick, Trapp, Jamie, Johnston, Peter   +3 more
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X-Ray Energies for Effective Atomic Number Determination

Neuroradiology, 1976
The measurement of the effective atomic number of a piece of material in vivo can be achieved using computed tomography. The precision of measurement of this parameter depends on the precision of measurement of the X-ray absorption coefficient at two energies and the separation of these energies.
I Isherwood, B R Pullan
exaly   +3 more sources

Concept of Effective Atomic Number and Effective Mass Density in Dual-Energy X-Ray Computed Tomography

Nuclear Instruments & Methods in Physics Research B, 2014
International audienceThis paper focuses on dual-energy X-ray computed tomography and especially the decomposition of the measured attenuation coefficient in a mass density and atomic number basis. In particular, the concept of effective atomic number is
Anne Bonnin, Valerie Kaftandjian
exaly   +2 more sources

Calculations of effective atomic number

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 2007
We will present and discuss effective atomic number (Zeff) obtained by different methods of calculations. There is no unique relation between computed values. This observation led us to the conclusion that any Zeff is valid only for given process. We will compare Zeff obtained by following methods: 1. Variational method (Slater), 2.
Kaliman, Zoran, Jelovica Badovinac, Ivana, Orlić, Nada   +2 more
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The effective atomic number of mix D

The British Journal of Radiology, 1979
It is well known that mix D, which was introduced by Jones and Raine (1949), has been widely used as a phantom material for photons and electrons in radiotherapy. By adding fillers of magnesium oxide and tianium dioxide to wax, they made an improvement for mix D compared with wax alone in terms of mechanical properties and the attenuation ...
T, Hiraoka, K, Kawashima
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An Experimental Evaluation of the Atomic Number Effect

Advances in X-ray Analysis, 1973
AbstractA method for measuring the atomic number effect is developed using a sandwich sample technique. The depth distributions of x-ray production, ϕ(ρz) curves, have been measured for a zinc tracer in aluminum, copper, silver and gold matrices at 30, 25, 20 and 15 keV. The ϕ(ρz) curves were measured using a Cambridge Microscan 5 in which the electron
L. Parobek, J. D. Brown
openaire   +1 more source