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Derivation of factors for estimating the scatter of diagnostic x-rays from walls and ceiling slabs


, : Derivation of factors for estimating the scatter of diagnostic x-rays from walls and ceiling slabs. Journal of Radiological Protection 32(4): 373-396

Computed tomography (CT) scanning rooms and interventional x-ray facilities with heavy workloads may require the installation of shielding to protect against radiation scattered from walls or ceiling slabs. This is particularly important for the protection of those operating x-ray equipment from within control cubicles who may be exposed to radiation scattered from the ceiling over the top of the protective barrier and round the side if a cubicle door is not included. Data available on the magnitude of this tertiary scatter from concrete slabs are limited. Moreover, there is no way in which tertiary scatter levels can be estimated easily for specific facilities. There is a need for a suitable method for quantification of tertiary scatter because of the increases in workloads of complex x-ray facilities. In this study diagnostic x-ray air kerma levels scattered from concrete and brick walls have been measured to verify scatter factors. The results have been used in a simulation of tertiary scatter for x-ray facilities involving summation of scatter contributions from elements across concrete ceiling slabs. The majority of the ceiling scatter air kerma to which staff behind a barrier will be exposed arises from the area between the patient/x-ray tube and the staff. The level depends primarily on the heights of the ceiling and protective barrier. A method has been developed to allow tertiary scatter levels to be calculated using a simple equation based on a standard arrangement for rooms with different ceiling and barrier heights. Coefficients have been derived for a CT facility and an interventional suite to predict tertiary scatter levels from the workload, so that consideration can be given to the protection options available.

US$19.90

PMID: 23006642

DOI: 10.1088/0952-4746/32/4/373


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Laurentino, R.V.; Lopes, I.G.L.; Azevedo, V.N.; Machado, L.F.A.; Moreira, M.R.C.; Lobato, L.; Ishak, M.O.G.; Ishak, R.; Vallinoto, A.C.R., 2005: Molecular characterization of human T-cell lymphotropic virus coinfecting human immunodeficiency virus 1 infected patients in the Amazon region of Brazil. The present work evaluated the epidemiology of human immunodeficiency virus 1/human T-cell lymphotropic virus (HIV-1/HTLV) coinfection inpatients living in Belem (state of Parca) and Macapa (state of Amapa), two cities located in the Amazon region...

Araki S.; Mawatari S., 1970: Ouabain and erythrocyte ghost atpase effects in human muscular dystrophies. Archives of Neurology 24(2): 187-190

Anteliz García, E.T.; Carballo, C.M.; Estévez, S.; Diana, Sía.; de Mena, A.; Manonelles, G.; Cazes, C.I.; López, E.L., 2017: Cervicofacial actinomycosis as differential diagnosis of cavum carcinoma: case report. La actinomicosis es una enfermedad infrecuente en pediatría que implica, habitualmente, un desafío diagnóstico. Es producida por bacterias del género Actinomyces. La forma cervicofacial suele originarse tras la disrupción de la mucosa oral se...

Kishida, P.; de Godoy, A.C.; Goffi, F.S., 1970: Clinical, laboratory and anatomosurgical correlation in acute appendicitis. Amb 16(11): 389-392

Lesny, I., 1983: Nuptiality of divorced persons in Czechoslovakia. Trends in the remarriage patterns of divorced persons in Czechoslovakia are examined over the past 20 years using official data. Differences over time and between men and women are analyzed. (summary in ENG, RUS)

Johnston, S.L.; Blue, R.S.; Jennings, R.T.; Tarver, W.J.; Gray, G.W., 2014: Astronaut medical selection during the shuttle era: 1981-2011. U.S. astronauts undergo extensive job-related screening and medical examinations prior to selection in order to identify candidates optimally suited for careers in spaceflight. Screening medical standards evolved over many years and after extensiv...

Bosetti, C.; Lucenteforte, E.; Bracci, P.M.; Negri, E.; Neale, R.E.; Risch, H.A.; Olson, S.H.; Gallinger, S.; Miller, A.B.; Bueno-de-Mesquita, H.B.; Talamini, R.; Polesel, J.; Ghadirian, P.; Baghurst, P.A.; Zatonski, W.; Fontham, E.; Holly, E.A.; Gao, Y.T.; Yu, H.; Kurtz, R.C.; Cotterchio, M.; Maisonneuve, P.; Zeegers, M.P.; Duell, E.J.; Boffetta, P.; L.V.cchia, C., 2014: Ulcer, gastric surgery and pancreatic cancer risk: an analysis from the International Pancreatic Cancer Case-Control Consortium (PanC4). Peptic ulcer and its treatments have been associated to pancreatic cancer risk, although the evidence is inconsistent. We pooled 10 case-control studies within the Pancreatic Cancer Case-control Consortium (PanC4), including 4717 pancreatic cancer...

Zhou, Z.; Yan, D.; Cheng, X.; Kong, M.; Liu, Y.; Feng, C.; Chen, X., 2016: Biomaterials based on N,N,N-trimethyl chitosan fibers in wound dressing applications. In the present work, N,N,N-trimethyl chitosan (TMC) fibers were synthesized successfully and the resulting quaternized materials were characterized by FTIR. The designed TMC fibers with different degree of quaternization achieved high water absorp...

Guter, G.A., 1991: Nitrate analyzer. A system and method for determining the concentration of nitrate ions in a nitrate ion-containing water sample which also contains chloride ions and bicarbonate ions is disclosed. The potentially interfacing chloride ions are suppressed by reactio...

Cramer, A., 1955: Functional roentgen diagnosis of the pelvic girdle. Hippokrates 26(11): 332-334