SU-CC-ValA-07: Air Kerma Rate Measurements From a Miniature X-Ray Source Using Free-Air Ionization Chambers

2006 ◽  
Vol 33 (6Part2) ◽  
pp. 1983-1984
Author(s):  
S Davis ◽  
J Micka ◽  
L DeWerd ◽  
T Rusch
Keyword(s):  
Ionization Chambers ◽  
X Ray ◽  
Air Kerma ◽  
Free Air ◽  
Air Ionization ◽  
Air Kerma Rate

Poster - 15: Air kerma rate measurements using a cylindrical free-air ionization chamber on the 05B1-1 beamline at the Canadian Light Source

2016 ◽  
Vol 43 (8Part2) ◽  
pp. 4939-4939
Author(s):  
Danielle Anderson ◽  
Albert Siegbahn ◽  
Gino Fallone ◽  
Brad Warkentin
Keyword(s):  
Light Source ◽  
Ionization Chamber ◽  
Air Kerma ◽  
Free Air ◽  
Air Ionization ◽  
Air Kerma Rate

Reference dosimetry at the Australian Synchrotron's imaging and medical beamline using free-air ionization chamber measurements and theoretical predictions of air kerma rate and half value layer

2013 ◽  
Vol 40 (6Part1) ◽  
pp. 062103 ◽  
Author(s):  
Jeffrey C. Crosbie ◽  
Peter A. W. Rogers ◽  
Andrew W. Stevenson ◽  
Christopher J. Hall ◽  
Jessica E. Lye ◽  
...  
Keyword(s):  
Ionization Chamber ◽  
Air Kerma ◽  
Free Air ◽  
Air Ionization ◽  
Theoretical Predictions ◽  
Chamber Measurements ◽  
Air Kerma Rate

National primary standard of air kerma, air kerma rate, exposure, exposure rate and energy flux for X-rays and gamma radiation GET 8-2019

2020 ◽  
pp. 8-12
Author(s):  
Alexandr V. Oborin ◽  
Anna Y. Villevalde ◽  
Sergey G. Trofimchuk
Keyword(s):  
Gamma Radiation ◽  
Energy Flux ◽  
Primary Standard ◽  
Average Energy ◽  
Ion Pair ◽  
X Rays ◽  
Exposure Rate ◽  
Ionization Chambers ◽  
Air Kerma ◽  
Air Kerma Rate

The results of development of the national primary standard of air kerma, air kerma rate, exposure, exposure rate and energy flux for X-rays and gamma radiation GET 8-2011 in 2019 are presented according to the recommendations of the ICRU Report No. 90 “Key Data for Ionizing-Radiation Dosimetry: Measurement Standards and Applications”. The following changes are made to the equations for the units determination with the standard: in the field of X-rays, new correction coefficients of the free-air ionization chambers are introduced and the relative standard uncertainty of the average energy to create an ion pair in air is changed; in the field of gamma radiation, the product of the average energy to create an ion pair in air and the electron stopping-power graphite to air ratio for the cavity ionization chambers is changed. More accurate values of the units reproduced by GET 8-2019 are obtained and new metrological characteristics of the standard are stated.

Free-air ionization chambers

Metrologia ◽  
2009 ◽  
Vol 46 (2) ◽  
pp. S9-S23 ◽  
Author(s):  
D T Burns ◽  
L Büermann
Keyword(s):  
Ionization Chambers ◽  
Free Air ◽  
Air Ionization

scholarly journals Effects of aluminum-copper alloy filtration on photon spectra, air kerma rate and image contrast

2004 ◽  
Vol 15 (3) ◽  
pp. 214-219 ◽  
Author(s):  
Andréa Gonçalves ◽  
João Manuel Domingos de Almeida Rollo ◽  
Marcelo Gonçalves ◽  
Francisco Haiter Neto ◽  
Frab Norberto Bóscolo
Keyword(s):  
Copper Alloy ◽  
Good Alternative ◽  
Image Contrast ◽  
X Ray ◽  
Air Kerma ◽  
Aluminum Copper Alloy ◽  
Aluminum Filter ◽  
Photon Spectra ◽  
Aluminum Filtration ◽  
Air Kerma Rate

This study evaluated the performance of aluminum-copper alloy filtration, without the original aluminum filter, for dental radiography in terms of x-ray energy spectrum, air kerma rate and image quality. Comparisons of various thicknesses of aluminum-copper alloy in three different percentages were made with aluminum filtration. Tests were conducted on an intra-oral dental x-ray machine and were made on mandible phantom and on step-wedge. Depending on the thickness of aluminum-copper alloy filtration, the beam could be hardened and filtrated. The use of the aluminum-copper alloy filter resulted in reductions in air kerma rate from 8.40% to 47.33%, and indicated the same image contrast when compared to aluminum filtration. Aluminum-copper alloy filtration may be considered a good alternative to aluminum filtration.

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