نتایج جستجو برای: icru 38
تعداد نتایج: 105112 فیلتر نتایج به سال:
The aim of this report is to present a new two-piece thyroid-neck phantom produced by the concurrent use of epoxy resin and poly(methyl methacrylate) (PMMA: plexiglass) soft tissue equivalent materials. Accordingly, mass attenuation coefficients of the epoxy resin and the plexiglass compounds were obtained from simulation (NIST XCOM 3.1) and measurements (practical dosimetry) and compared to th...
The practice of using the direct ionization radiation (electrons, protons, antiprotons, pions, ions, etc) or of the indirect ionization radiation (photons, neutrons, etc) in economy and social life has led to the introduction of the absorbed dose magnitude (ICRU 1953) defined as the energy absorbed per mass unit of the irradiated substance. This is a fundamental magnitude valid for any type of ...
A compilation of fluence-to-absorbed dose conversion coefficients for the dose to the lens of the eye is presented. The compilation consists of both previously published data and newly calculated values: photon data (5 keV-50 MeV for both kerma approximation and full electron transport), electron data (10 keV-50 MeV), and positron data (1 keV-50 MeV) - neutron data will be published separately....
Volume 31, Number 1, January/February 1999 termination using methotrexate started to appear in both the medical and popular literature.3 Interest in this method grew rapidly within the community of abortion providers. In spring 1996, the National Abortion Federation (NAF) devoted its annual postgraduate symposium to medical abortion, including both mifepristone and methotrexate, and the Planned...
According to the Institute of Medicine’s Preventing Medication Errors report, the average hospitalized patient is subject to at least one medication error per day. This confirms previous research findings that medication errors represent the most common patient safety error. More than 40 percent of medication errors are believed to result from inadequate reconciliation in handoffs during admiss...
The study aims to conduct a bibliometric analysis of corpusrelated studies in linguistics between 2000 and 2015. Results show that the output of corpus-related publications have significantly increased in the past 15 years. In addition, traditional scientific powers such as the United States play leading roles in the area, while developing countries such as China also exert their impact in the ...
The deleterious effects of a disrupted copper metabolism are illustrated by hereditary diseases caused by mutations in the genes coding for the copper transporters ATP7A and ATP7B. Menkes disease, involving ATP7A, is a fatal neurodegenerative disorder of copper deficiency. Mutations in ATP7B lead to Wilson disease, which is characterized by a predominantly hepatic copper accumulation. The low i...
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