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Copying of holograms by spot scanning approach
Applied Optics, 2018To replicate holograms, contact copying has conventionally been used. In this approach, a photosensitive material is fixed together with a master hologram and illuminated with a coherent beam. This method is simple and enables high-quality copies; however, it requires a large optical setup for large-area holograms.
Makoto, Okui +5 more
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A Satellite System with Limited-Scan Spot Beams
IEEE Transactions on Communications, 1979A satellite system with several independent spot beams is considered, wherein each spot beam can be scanned over a limited portion of some large service region. The spectral band is totally reused in each spot beam, thereby providing high system capacity.
Anthony S. Acampora +2 more
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Reflections on the etiology of hot spots on liver scans
European Journal of Nuclear Medicine, 1980Liver scintigraphy demonstrated areas of increased radiocolloid uptake in three cases with obstruction of the superior vena cava and extensive collateral circulation through the veins of the thoracic wall. The pattern of the hyperactive zones is indicative of predominant vascularization of the liver via the umbilical vein, with high colloid particle ...
K K, Ang, M J, De Roo, P, Devos
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2018
The environmental scan provides a systematic overview of the external factors that are important to the organization (or sector) and indicates whether the organization can influence them or not.Scanning promotes an active response to positive (opportunities) and compliant factors, and leads to insights how to live with the‘hard facts'.
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The environmental scan provides a systematic overview of the external factors that are important to the organization (or sector) and indicates whether the organization can influence them or not.Scanning promotes an active response to positive (opportunities) and compliant factors, and leads to insights how to live with the‘hard facts'.
openaire +1 more source
Spot scanning for 250 MeV protons.
Strahlentherapie und Onkologie : Organ der Deutschen Rontgengesellschaft ... [et al], 1990Protons have a long tradition in precision treatment of lesions of limited size at limited depth. Recently interest has developed in hospital based proton therapy accelerators, able to treat deep seated tumors. Heavy charged particles, and especially protons, are particularly suited to treat well localized tumors. Protons can be collimated as precisely
Blattmann, H. +3 more
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Spot distribution measurement using a scanning nanoslit
Applied Optics, 2011A scanning and rotating nanoslit is used to measure submicrometer features in focused spot distributions. Using a filtered backprojection technique, a highly accurate reconstruction is demonstrated. Experimental results are confirmed by simulating the scanning slit technique using a physical optics simulation program.
Anoop, George, Tom D, Milster
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Spot-Scanning-Based Proton Therapy for Extracranial Chordoma
International Journal of Radiation Oncology*Biology*Physics, 2011To evaluate effectiveness and safety of spot-scanning-based proton-radiotherapy (PT) for extracranial chordomas (ECC).Between 1999-2006, 40 patients with chordoma of C-, T-, and L-spine and sacrum were treated at Paul Scherrer Institute (PSI) with PT using spot-scanning.
Staab, Adrian +9 more
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Hot spot liver scan in focal nodular hyperplasia
American Journal of Roentgenology, 1980Using scintigraphy of the liver with radiocolloid as a detector space-occupying lesions generally are visualized as areas of decreased accumulation of radioactivity. Only areas related to altered vascular dynamics in the liver secondary to obstruction of the superior or inferior vena cava or the hepatic veins show up as focal areas of increased ...
PIERS, DA +5 more
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PROTON SPOT SCANNING RADIOTHERAPY OF SPONTANEOUS CANINE TUMORS
Veterinary Radiology & Ultrasound, 2009Thirty dogs with spontaneous tumors were irradiated with proton therapy using a novel spot scanning technique to evaluate the safety and efficacy of the system, and to study the acute and late radiation reactions. Nasal tumors, soft tissue sarcomas, and miscellaneous tumors of the head were treated with a median total dose of 52.5 Gy given in 3.5 Gy ...
Mayer-Stankeová, Simona +10 more
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