نتایج جستجو برای: stratified shields
تعداد نتایج: 47903 فیلتر نتایج به سال:
Financial Disclosure: None. Correspondence: Dr Shields, Ocular Oncology Service, Wills Eye Hospital, 840 Walnut St, Philadelphia, PA 19107 (mvenditto @shieldsoncology.com). Funding/Support: Support provided by the Paul Kayser International Award of Merit in Retina Research, Houston, Tex (Dr J. Shields), Macula Foundation, New York, NY (Dr C. Shields), the Noel T. and Sara L. Simmonds Endowment ...
Background: Bismuth composites are new and non-lead shields that are capable of breast dose reduction while preserving image quality. In this study, different percentages of Bismuth were used in designing and constructing polymer composites as breast shields in chest CT. Materials and Methods: Micro particles of Bismuth with a ratio of 1% to 15% in Silicone matrix with two thicknesses were use...
PURPOSE Although the use of thyroid shields for patients for head CT examinations is reasonable and even required by German regulations, so far available shields are often not used due to difficult applicability. New shields that are easier to use and therefore may gain wider acceptance and more frequent use are now available. In this work two new patient shields are investigated regarding thei...
Peter B. Moyle, Patrick K. Crain, Keith Whitener, & Jeffrey F. Mount Department of Wildlife, Fish, and Conservation Biology, University of California, 1 Shields Avenue, Davis CA 95616, U.S.A. (email: [email protected]) The Nature Conservancy, Cosumnes River Preserve, 13501 Franklin Blvd., Galt CA 95632, U.S.A. Department of Geology, University of California, 1 Shields Avenue, Davis CA 95616 U...
OBJECTIVE The goal was to determine whether young children and their parents prefer physicians wearing clear face shields or surgical masks. METHODS Eighty children (4-10 years of age) and their guardians were recruited from a pediatric emergency department. A survey and color photographs of the same male and female physicians wearing face shields and surgical masks were distributed. The pare...
Introduction Lead-based shields are the most widely used attenuators in X-ray and gamma ray fields. The heavy weight, toxicity and corrosion of lead have led researchers towards the development of non-lead shields. Materials and Methods The purpose of this study was to design multi-layered shields for protection against X-rays and gamma rays in diagnostic radiology and nuclear medicine. In this...
Neve Gordon and Nicola Perugini might well add the laws of war as another instance Orwellian “doublethink” where concept human shields operates if it were GPS tracker directing you to a target. The prohibition is framed iron dome sheltering vulnerable actors from attacking armies, but this book compellingly demonstrates that shelter part arsenal modern lawfare. Is IHL worth saving.
We performed a retrospective study of pelvic radiographs of children between August 2003 and January 2004 to determine whether gonadal shields effectively protected the gonads during pelvic radiographs in pediatric patients. We considered 1,047 radiographs of 111 children under the age of 16 years who were examined by the orthopaedic department at the University Hospital of North Staffordshire....
Rabbit corneas were infected with a tobramycin-resistant (minimum inhibitory concentration, 31.25 micrograms/ml) strain of Pseudomonas aeruginosa 27853 (10(3) colony-forming units) and were treated 22 hours later with collagen corneal shields hydrated in either 25 mg/ml ciprofloxacin, 40 mg/ml norfloxacin, 40 mg/ml tobramycin, or deionized water. Shields were removed at 26 hours postinfection, ...
Head computed tomography examinations are often accompanied with unnecessary irradiation of superficial organs that are rarely the main target for the investigation. The aim of this work is to demonstrate that lead shields could be effectively used to protect superficial organs without compromising image quality where superficial organ itself is not a target and that the irradiation of the supe...
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