Results 141 to 150 of about 2,824 (166)

Sampling size in the verification of manufactured‐supplied air kerma strengths

Medical Physics, 2005
Quality control mandate that the air kerma strengths of permanent seeds be verified, this is usually done by statistics inferred from 10% of the seeds. The goal of this paper is to proposed a new sampling method in which the number of seeds to be measured will be set beforehand according to an a priori statistical level of uncertainty. The results are
Luis Isaac, Ramos, Rafael, Martinez Monge   +1 more
openaire   +2 more sources

Selection of an Appropriate Air Kerma Rate Constant for 75Se Sources

Health Physics, 2013
Monte Carlo simulation techniques using a Monte Carlo N-Particle code (MCNP5) analyzed six Source Production & Equipment Co., Inc., Se industrial radiography sources to determine an appropriate air kerma rate constant for Se, factoring in source encapsulation and compared to a theoretical approximation.
Blake, H Currier, John J, Munro, David C, Medich   +2 more
openaire   +2 more sources

Effect of the diaphragm of free-air ionisation chamber for X-ray air-kerma measurements

Radiation Protection Dosimetry, 2011
Free-air ionisation chambers are widely used at standards laboratories as primary standards for absolute measurements of air kerma in X-ray fields. The area of the diaphragm aperture of a free-air ionisation chambers is an important factor for absolute measurements because it defines the size of the X-ray beam incident on the free-air chamber.
Tadahiro, Kurosawa, Nobuhisa, Takata, Norio, Saito   +2 more
openaire   +2 more sources

Diaphragm correction factors for free-air chamber standards for air kerma in x-rays

Physics in Medicine & Biology, 2009
At present, only a correction factor for photon transmission, k l, is systematically applied for the entrance diaphragm of free-air chamber standards for air kerma. In the present work, the Monte Carlo code PENELOPE is used to re-evaluate k l for the BIPM standards and new correction factors are calculated for photon
D T, Burns, C, Kessler
openaire   +2 more sources

Standards of Air Kerma at the BEV for 137Cs Gamma Rays

Radiation Protection Dosimetry, 1996
At the BEV two cylindrical cavity ionisation chambers have been established as primary standards to measure air kerma for 137 Cs γ rays. The design of both chambers is the same, the chambers only differ by the specifications of the graphite they are made from. The main volume of the cavity was determined by two independent methods, i.e.
J. Witzani, A. Leitner
openaire   +1 more source

National primary standard for the unit of air kerma, air kerma rate, exposure, exposure rate, and x- and gamma-ray energy flux

Measurement Techniques, 2012
The current state of the national primary standard GET 8-2011 for the units of air kerma, exposure, their rates, and energy flux (power) in x- and gamma-radiation, which was revised in 2007–2011, is examined. The structure of the standard, and its operating principles and metrological characteristics, are described.
A. V. Oborin, A. Yu. Villevalde, S. G. Trofimchuk   +2 more
openaire   +1 more source

The IPEM code of practice for determination of the reference air kerma rate for HDR¹⁹²Ir brachytherapy sources based on the NPL air kerma standard

Physics in Medicine and Biology, 2010
This paper contains the recommendations of the high dose rate (HDR) brachytherapy working party of the UK Institute of Physics and Engineering in Medicine (IPEM). The recommendations consist of a Code of Practice (COP) for the UK for measuring the reference air kerma rate (RAKR) of HDR (192)Ir brachytherapy sources.
A M, Bidmead, T, Sander, S M, Locks, C D, Lee, E G A, Aird, R F, Nutbrown, A, Flynn   +6 more
openaire   +2 more sources

Air Kerma Strength

2013
Brian F. Hasson, Charlie Ma, Lu Wang, David E. Wazer, Jay E. Reiff, Jay E. Reiff, Brandon J. Fisher, Tod W. Speer, James H. Brashears, John P. Christodouleas, Anthony E. Dragun, Volker Budach, Timothy Holmes, Filip T. Troicki, Jaganmohan Poli, Filip T. Troicki, Jaganmohan Poli, Lindsay G. Jensen, Loren K. Mell, Stephan Mose, Erik Limbergen, Cheng B. Saw, Nisha R. Patel, Michael L. Wong, Ning J. Yue, James H. Brashears, Curt Heese, Ramesh Rengan, Charles R. Thomas, Rene Rubin, Rene Rubin, Jay E. Reiff, Jay E. Reiff, Nisha R. Patel, Michael L. Wong, Jo Ann Chalal, Gerhard G. Grabenbauer, Lindsay G. Jensen, Brent S. Rose, Arno J. Mundt, Ning J. Yue, Rene Rubin, Tod W. Speer, Tod W. Speer, Rene Rubin, Rene Rubin, Rene Rubin, Tod W. Speer, Daniel J. Indelicato, Robert H. Sagerman, Lydia T. Komarnicky-Kocher, Christin A. Knowlton, Michelle Kolton Mackay, Jo Ann Chalal, Darek Michalski, M. Saiful Huq   +55 more
openaire   +1 more source

Determination of the air-kerma in mammography x-rays at NIM

Journal of the Korean Physical Society, 2022
Wang Ji, Guo Siming, Lu Pingzhou, Wu Jinjie, Liu Ying, Li Ruonan, Wang Yulong   +6 more
openaire   +1 more source

1. Use of air kerma for photon dosimetry in air

The British Journal of Radiology, 1982
openaire   +1 more source