Browsing by Author "Nishikawa, Masami"
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- ItemThe EADC-ADNI Harmonized Protocol for manual hippocampal segmentation on magnetic resonance: Evidence of validity.(2014-09-30) Frisoni, Giovanni B; Jack, Clifford R; Bocchetta, Martina; Bauer, Corinna; Frederiksen, Kristian S; Liu, Yawu; Preboske, Gregory; Swihart, Tim; Blair, Melanie; Cavedo, Enrica; Grothe, Michel J; Lanfredi, Mariangela; Martinez, Oliver; Nishikawa, Masami; Portegies, Marileen; Stoub, Travis; Ward, Chadwich; Apostolova, Liana G; Ganzola, Rossana; Wolf, Dominik; Barkhof, Frederik; Bartzokis, George; DeCarli, Charles; Csernansky, John G; deToledo-Morrell, Leyla; Geerlings, Mirjam I; Kaye, Jeffrey; Killiany, Ronald J; Lehéricy, Stephane; Matsuda, Hiroshi; O'Brien, John; Silbert, Lisa C; Scheltens, Philip; Soininen, Hilkka; Teipel, Stefan; Waldemar, Gunhild; Fellgiebel, Andreas; Barnes, Josephine; Firbank, Michael; Gerritsen, Lotte; Henneman, Wouter; Malykhin, Nikolai; Pruessner, Jens C; Wang, Lei; Watson, Craig; Wolf, Henrike; deLeon, Mony; Pantel, Johannes; Ferrari, Clarissa; Bosco, Paolo; Pasqualetti, Patrizio; Duchesne, Simon; Duvernoy, Henri; Boccardi, Marina; ,An international Delphi panel has defined a harmonized protocol HarP for the manual segmentation of the hippocampus on MR The aim of this study is to study the concurrent validity of the HarP toward local protocols and its major sources of variance
- ItemEffects of electromagnetic fields emitted from W-CDMA-like mobile phones on sleep in humans.(2013-11-12) Nakatani-Enomoto, Setsu; Furubayashi, Toshiaki; Ushiyama, Akira; Groiss, Stefan Jun; Ueshima, Kazumune; Sokejima, Shigeru; Simba, Ally Y; Wake, Kanako; Watanabe, So-Ichi; Nishikawa, Masami; Miyawaki, Kaori; Taki, Masao; Ugawa, YoshikazuIn this study we investigated subjective and objective effects of mobile phones using a Wideband Code Division Multiple Access W CDMA like system on human sleep Subjects were 19 volunteers Real or sham electromagnetic field EMF exposures for 3 h were performed before their usual sleep time on 3 consecutive days They were exposed to real EMF on the second or third experimental day in a double blind design Sleepiness and sleep insufficiency were evaluated the next morning Polysomnograms were recorded for analyses of the sleep variables and power spectra of electroencephalograms EEG No significant differences were observed between the two conditions in subjective feelings Sleep parameters including sleep stage percentages and EEG power spectra did not differ significantly between real and sham exposures We conclude that continuous wave EMF exposure for 3 h from a W CDMA like system has no detectable effects on human sleep
- ItemEffects of short-term W-CDMA mobile phone base station exposure on women with or without mobile phone related symptoms.(2009-01-28) Furubayashi, Toshiaki; Ushiyama, Akira; Terao, Yasuo; Mizuno, Yoko; Shirasawa, Kei; Pongpaibool, Pornanong; Simba, Ally Y; Wake, Kanako; Nishikawa, Masami; Miyawaki, Kaori; Yasuda, Asako; Uchiyama, Mitsunori; Yamashita, Hitomi Kobayashi; Masuda, Hiroshi; Hirota, Shogo; Takahashi, Miyuki; Okano, Tomoko; Inomata-Terada, Satomi; Sokejima, Shigeru; Maruyama, Eiji; Watanabe, Soichi; Taki, Masao; Ohkubo, Chiyoji; Ugawa, YoshikazuTo investigate possible health effects of mobile phone use we conducted a double blind cross over provocation study to confirm whether subjects with mobile phone related symptoms MPRS are more susceptible than control subjects to the effect of electromagnetic fields EMF emitted from base stations We sent questionnaires to 5 000 women and obtained 2 472 valid responses from possible candidates from these we recruited 11 subjects with MPRS and 43 controls There were four EMF exposure conditions each of which lasted 30 min continuous intermittent and sham exposure with and without noise Subjects were exposed to EMF of 2 14 GHz 10 V m W CDMA in a shielded room to simulate whole body exposure to EMF from base stations although the exposure strength we used was higher than that commonly received from base stations We measured several psychological and cognitive parameters pre and post exposure and monitored autonomic functions Subjects were asked to report on their perception of EMF and level of discomfort during the experiment The MPRS group did not differ from the controls in their ability to detect exposure to EMF nevertheless they consistently experienced more discomfort regardless of whether or not they were actually exposed to EMF and despite the lack of significant changes in their autonomic functions Thus the two groups did not differ in their responses to real or sham EMF exposure according to any psychological cognitive or autonomic assessment In conclusion we found no evidence of any causal link between hypersensitivity symptoms and exposure to EMF from base stations
- ItemTraining labels for hippocampal segmentation based on the EADC-ADNI harmonized hippocampal protocol.(2015-01-24) Boccardi, Marina; Bocchetta, Martina; Morency, Félix C; Collins, D Louis; Nishikawa, Masami; Ganzola, Rossana; Grothe, Michel J; Wolf, Dominik; Redolfi, Alberto; Pievani, Michela; Antelmi, Luigi; Fellgiebel, Andreas; Matsuda, Hiroshi; Teipel, Stefan; Duchesne, Simon; Jack, Clifford R; Frisoni, Giovanni B; ,The European Alzheimer s Disease Consortium and Alzheimer s Disease Neuroimaging Initiative ADNI Harmonized Protocol HarP is a Delphi definition of manual hippocampal segmentation from magnetic resonance imaging MRI that can be used as the standard of truth to train new tracers and to validate automated segmentation algorithms Training requires large and representative data sets of segmented hippocampi This work aims to produce a set of HarP labels for the proper training and certification of tracers and algorithms