著者

Hitoshi Ogino Osamu Iida Koichi Akutsu Yoshiro Chiba Hiromitsu Hayashi Hatsue Ishibashi-Ueda Shuichiro Kaji Masaaki Kato Kimihiro Komori Hitoshi Matsuda Kenji Minatoya Hiroko Morisaki Takao Ohki Yoshikatsu Saiki Kunihiro Shigematsu Norihiko Shiiya Hideyuki Shimizu Nobuyoshi Azuma Hirooki Higami Shigeo Ichihashi Toru Iwahashi Kentaro Kamiya Takahiro Katsumata Nobuyoshi Kawaharada Yoshihisa Kinoshita Takuya Matsumoto Shinji Miyamoto Takayuki Morisaki Tetsuro Morota Kiyonori Nanto Toshiya Nishibe Kenji Okada Kazumasa Orihashi Junichi Tazaki Masanao Toma Takuro Tsukube Keiji Uchida Tatsuo Ueda Akihiko Usui Kazuo Yamanaka Haruo Yamauchi Kunihiro Yoshioka Takeshi Kimura Tetsuro Miyata Yutaka Okita Minoru Ono Yuichi Ueda on behalf of the Japanese Circulation Society the Japanese Society for Cardiovascular Surgery the Japanese Association for Thoracic Surgery and the Japanese Society for Vascular Surgery Joint Working Group

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-22-0794, (Released:2023-09-01)

参考文献数

1943

被引用文献数

7

著者

Takanori Tsujimoto Takeo Tedoriya Yasushi Yamauchi Yutaka Okita Kenji Okada

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-22-0334, (Released:2022-10-08)

参考文献数

23

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Background: Three-dimensional aortic root evaluation using virtual reality (VR) techniques for valve-sparing aortic root replacement (VSARR) preparation has not yet been implemented, so we demonstrated VR computed tomography (VR-CT) and assessed its utility for VSARR.Methods and Results: We enrolled 72 patients who underwent multidetector CT before elective VSARR for annuloaortic ectasia with tricuspid aortic valve. The geometries of their aortic roots were measured with a VR-CT workstation. The mean values of geometric height (GH), free margin length (FML), and commissural height (CH) were 17.2±2.4 mm, 36.0±5.2 mm, and 24.0±4.3 mm, respectively. The right coronary/noncoronary CH was significantly greater than the left coronary/right coronary and left coronary/noncoronary CH. The left coronary cusp had the shortest FML, intercommissural distances (ICD), and smallest central angle. Although the right coronary cusp had the largest values for FML, ICD, and central angle, the right coronary cusp had the lowest GH and EH. The VR-CT measurements strongly correlated with intraoperative alternatives, especially with mean GH (R2=0.75) and left coronary/noncoronary CH (R2=0.79). Furthermore, mean GH was observed to be significantly different among the selected graft size groups; therefore, the preoperative mean GH could play a significant role in graft sizing.Conclusions: VR-CT evaluation allows a thorough understanding of aortic root anatomy, which could facilitate VSAAR.

著者

Maki Fukuda Tsuyoshi Ohta Hiroshi Okabayashi Noritaka Masahira Toshiki Matsuoka Kenji Okada Takaya Tsuno Shota Nishimoto Yusuke Ueba

出版者

The Japanese Society for Neuroendovascular Therapy

雑誌

Journal of Neuroendovascular Therapy (ISSN:18824072)

巻号頁・発行日

vol.14, no.4, pp.151-156, 2020 (Released:2020-04-20)

参考文献数

8

被引用文献数

1 1

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Objective: The objective of this study was to evaluate the reproducibility of three-dimensional (3D) images of the aortic arch reconstructed using a novel image processing algorithm for non-enhanced computed tomography (CT) images of the cervicothorax and abdomen obtained before emergency endovascular surgery.Case Presentations: In all, 46 patients who underwent acute mechanical thrombectomy between January and December 2018 were examined. The anatomical variations of the aortic arch were reproduced in all cases; however, the reproduction of the carotid arteries was difficult.Conclusion: Our novel 3D analysis system enables obtaining information on the aortic arch easily from plain CT data that may be useful in acute endovascular treatment.

著者

Naoki Tarutani Miki Asanome Kenji Okada Masahide Takahashi Takuo Minato Masahiro Sadakane Kiyofumi Katagiri Kei Inumaru

出版者

The Ceramic Society of Japan

雑誌

Journal of the Ceramic Society of Japan (ISSN:18820743)

巻号頁・発行日

vol.131, no.10, pp.830-836, 2023-10-01 (Released:2023-10-01)

参考文献数

44

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Additive manufacturing by vat-photopolymerization is important technique to prepare designed objects because of its features of availability, low cost, low energy consumption, and high-speed printing. One of the major challenges of this technique is how to expand the chemical composition towards metals and ceramics in addition to organic compounds. In this paper, we report synthesis of highly concentrated nanocolloids of nickel hydroxide acrylate and use them for vat-photopolymerization. Epoxide-mediated basification induced formation of dispersed nickel hydroxide acrylate monolayer/bilayer nanoparticles (diameter of 2.31 nm). The concentration of nanocolloid was prepared as 2.5 mol L−1 (Ni basis), which corresponds to 43 wt % and 30 vol %. The concentrated nanocolloids enabled to produce objects through vat-photopolymerization by using commercially available 3D printers. Addition of small quantity of organic cross-linker efficiently interconnect nanoparticles to form bulky objects. Owing to the organic moiety of nickel hydroxide salt nanoparticles, metal/carbon composites formed by heat-treatment without any reduction gas supply. Further heat-treatment led metal oxide bulky object with macroporous structure.

著者

岡田 憲治 オカダ ケンジ Kenji Okada

雑誌

立教法学

巻号頁・発行日

vol.47, pp.196-228, 1997-07-30

著者

Tetsuo Nakayama Shigeru Suga Kenji Okada Nobuhiko Okabe

出版者

National Institute of Infectious Diseases, Japanese Journal of Infectious Diseases Editorial Committee

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

vol.72, no.1, pp.49-52, 2019-01-31 (Released:2019-01-23)

参考文献数

23

被引用文献数

7

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A follow-up serological study was conducted involving 47 subjects who received 4 doses of diphtheria and tetanus toxoids, combined with the acellular pertussis vaccine (DTaP) together with Salk-type inactivated polio vaccine (DTaP-wIPV), until 6 years of age. All antibody levels declined more rapidly than expected within 3 years after the completion of primary vaccination with the 4th booster dose, and titers persisted until 6 years of age. The positive rate of the IgG antibody against pertussis toxin (PT) was 31.9% (15/47) at 4 years of age, 41.0% (16/39) at 5 years of age, and 40.5% (15/37) at 6 years of age. A significant increase in anti-PT antibodies was observed in 6 subjects, suggesting subclinical infection. Positive rates of antibodies against other targets did not decrease; however, titers of neutralizing antibodies against poliovirus type III decreased in a few subjects. These data suggest the need for an additional preschool booster immunization using DTaP-wIPV.

著者

Tetsuo Nakayama Shigeru Suga Kenji Okada Nobuhiko Okabe

出版者

National Institute of Infectious Diseases, Japanese Journal of Infectious Diseases Editorial Committee

雑誌

Japanese Journal of Infectious Diseases (ISSN:13446304)

巻号頁・発行日

pp.JJID.2018.314, (Released:2018-10-31)

参考文献数

23

被引用文献数

7

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A follow-up serological study was conducted involving 47 subjects who received four doses of diphtheria and tetanus toxoids combined with acellular pertussis vaccine (DTaP) together with Salk-type inactivated polio vaccine (DTaP-wIPV) until 6 years of age. All antibody levels declined more rapidly than expected within 3 years after the completion of the primary vaccination with 4th booster dose and titers persisted until 6 years of age. The positive rate of the IgG antibody against pertussis toxin (PT) was 31.9% (15/47) at 4 years of age, 41.0% (16/39) at 5 years of age, and 40.5% (15/37) at 6 years of age. A significant increase in the PT antibody was observed in 6 subjects, suggesting subclinical infection. Positive rates of antibodies against other targets did not decrease but titers of neutralizing antibodies against poliovirus type III decreased in only a few subjects. These data suggest the need for an additional preschool booster immunization using DTaP-wIPV.

著者

ワダ マコト アオキ シュンジ セコ カツモト マツバラ コウジ ドイ モトヒサ ウエクボ テツロウ オカダ ケンジ カワグチ サダオ Makoto WADA Shuhji AOKI Katsumoto SEKO Kouji MATSUBARA Motohisa DOI Tetsuro UEKUBO Kenji OKADA Sadao KAWAGUCHI

雑誌

Proceedings of the NIPR Symposium on Polar Meteorology and Glaciology

巻号頁・発行日

vol.4, 1991-05

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A 5-year project of "Antarctic Climate Research (ACR)" has been started from JARE-28 in 1987. Observations of clouds and precipitation were carried out using vertical pointing radar and two microwave radiometers in 1988 (JARE-29), the second year of this project. The observations of vertical pointing radar were begun on February 24,1988,and the microwave radiometers observations were handed over to JARE-29 by JARE-28 on February 1,1988. The characteristics of the precipitation in 1988 at Syowa Station, on the coast of Antarctica, are described in this paper. Ten days variation of precipitation are calculated using radar echo intensity at 300m altitude and the relation between radar reflectivity factor (Z) and rainfall rate (R), the so-called Z-R relation. The values obtained from this method are free from the contamination of drifting snow which affects precipitation obtained by rain gauge. The result shows the maximum precipitation in autumn (February and March) and the minimum precipitation in spring (September and October). Low precipitation in spring seems to be characteristic of 1988 at Syowa Station. Snow crystals of precipitation there can be classified into three types : graupel or a heavily rimed crystals, grathering bullets, and other types of crystals such as snowflakes, dendrites and plates. The first and second types of crystals were mainly observed throughout 1988. The height of the radar echo was relatively low; namely, the echo top was under 2km in altitude, in the period when the first type of crystals mainly fell. On the other hand, in the period when the second type of crystals mainly fell, the echo top was often over 4km altitude.