Zobrazeno 1 - 10
of 64
pro vyhledávání: '"W Abdel-Rahman"'
Autor:
H Mohammed, Arman Sarfehnia, Jan Seuntjens, Saad Aldelaijan, W Abdel-Rahman, François DeBlois, Li-Heng Liang, Nada Tomic, Slobodan Devic
Publikováno v:
Medical Physics. 38:6074-6083
Purpose: A radiochromic film based dosimetry system for high dose rate (HDR) Iridium-192 brachytherapy source was described. A comparison between calibration curves established in water and Solid Water was provided. Methods: Pieces of EBT-2 model GAF
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::228e6468597cda14bfaa860d70407fd0
https://doi.org/10.1118/1.3651482
https://doi.org/10.1118/1.3651482
Autor:
W. Abdel-Rahman, E.B. Podgorsak
Publikováno v:
Radiation Physics and Chemistry. 79:552-566
A clear understanding of energy transfer and energy absorption in photon interactions with matter is essential for the understanding of radiation dosimetry and development of new dosimetry techniques. The concepts behind the two quantities have been
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e995f078c5ab27d8fb63fbd2e92940f3
https://doi.org/10.1016/j.radphyschem.2010.01.007
https://doi.org/10.1016/j.radphyschem.2010.01.007
Publikováno v:
Medical Physics. 36:929-938
Ionization chambers used for reference dosimetry require a local secondary standard ionization chamber with a {sup 60}Co absorbed dose to water calibration coefficient N{sub D,w}{sup 6{sup 0Co}} traceable to a national primary standards dosimetry lab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0a1a8cc2f6aecd8fe1ae1513f4962ffd
https://doi.org/10.1118/1.3075822
https://doi.org/10.1118/1.3075822
Publikováno v:
Medical Physics. 33:3094-3104
Polarity effects in ionization chambers are caused by a radiation induced current, also known as Compton current, which arises as a charge imbalance due to charge deposition in electrodes of ionization chambers. We used a phantom-embedded extrapolati
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::64fb35d7fdc43dd642f51ec164b3f5c1
https://doi.org/10.1118/1.2208917
https://doi.org/10.1118/1.2208917
Autor:
Marina Olivares, Jan Seuntjens, Slobodan Devic, Té Vuong, W Abdel-Rahman, Christopher G. Soares, M Evans, Ervin B. Podgorsak
Publikováno v:
Medical Physics. 33:1116-1124
Megavoltage x-ray beams exhibit the well-known phenomena of dose buildup within the first few millimeters of the incident phantom surface, or the skin. Results of the surface dose measurements, however, depend vastly on the measurement technique empl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::02c45aa00d473f986ee3042ff7817367
https://doi.org/10.1118/1.2179169
https://doi.org/10.1118/1.2179169
Autor:
W Abdel-Rahman, Ervin B. Podgorsak
Publikováno v:
Medical Physics. 32:326-336
The growth of a radioactive daughter in neutron activation is commonly described with the saturation model that ignores the consumption of parent nuclei during the radio-activation process. This approach is not valid when radioactive sources with hig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c41eb9c77720315ff530b687f0a741c8
https://doi.org/10.1118/1.1827752
https://doi.org/10.1118/1.1827752
Publikováno v:
Medical Physics. 32:286-298
Recent work has shown that there is significant uncertainty in measuring build-up doses in mega-voltage photon beams especially at high energies. In this present investigation we used a phantom-embedded extrapolation chamber (PEEC) made of Solid Wate
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dbed2238764f66daf417f7774abbf326
https://doi.org/10.1118/1.1829401
https://doi.org/10.1118/1.1829401
Publikováno v:
Medical Physics. 29:433-440
A hybrid phantom-embedded extrapolation chamber (PEEC) made of Solid Water and bone-equivalent material was used for determining absorbed dose in a bone-equivalent phantom irradiated with clinical radiation beams (cobalt-60 gamma rays; 6 and 18 MV x
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3f79411caad8a37541a40e3399c692a
https://doi.org/10.1118/1.1450133
https://doi.org/10.1118/1.1450133
Publikováno v:
Medical physics. 36(3)
Ionization chambers used for reference dosimetry require a local secondary standard ionization chamber with a 60Co absorbed dose to water calibration coefficient N(D,W)(60Co) traceable to a national primary standards dosimetry laboratory or an accred
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=pmid________::1646c2cd0e890ac9ee0f09764c19a694
https://pubmed.ncbi.nlm.nih.gov/19378753
https://pubmed.ncbi.nlm.nih.gov/19378753
Publikováno v:
Medical Physics. 42:3431-3431
Purpose: To evaluate the performance of a postal dosimeter consisting of EBT3 films and a miniature Lucite phantom to be used for photon beams output audits for mega-voltage photon beams across the Saudi Arabia. Methods: Two batches of EBT3 films wer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8fe4ca3f1558b5acbd0476ba12cdb273
https://doi.org/10.1118/1.4924786
https://doi.org/10.1118/1.4924786