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由具有正、负反射系数的反射元构成的新型SAW反射器和谐振器

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压电与声光 1987年第2期 42-48+69页

作者： m.takeuchi,K.Yamanouchi,杨清宗日·东北大学电气通讯研究所日·东北大学电气通讯研究所

本文叙述由具有正、负反射系数的反射元构成的新型反射器.这类反射器具有反射率大、阻带宽、体波模转换小的优点.叙述了实现有效反射的工作原理和可采用的结构,给出了常用的几种SAW基片的有用的设计数据.对机械负载反射器的辐射体波模... 详细信息

本文叙述由具有正、负反射系数的反射元构成的新型反射器.这类反射器具有反射率大、阻带宽、体波模转换小的优点.叙述了实现有效反射的工作原理和可采用的结构,给出了常用的几种SAW基片的有用的设计数据.对机械负载反射器的辐射体波模的转换特性进行了理论研究;用金属条反射栅作的实验结果表明,这种新型反射器具有很强的反射性能.此外,采用新式反射栅结构的实验性100mHz单端对谐振器由于存在聚能模而具有无假响应的清晰的谐振响应.制作在SiO2/128°Y-X LiNbO3层状基片上的谐振器还具有很小的电容比（=30）,其一阶温度频率系数为零.

关键词：谐振器电容共振器 SAW 反射器反射系数

膀胱癌:扩散加权mRI——诊断T分期和评估组织学分级的准确性

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国际医学放射学杂志 2009年第3期 288-289页

作者： m.takeuchi S.Sasaki m.Ito S.Okada T.Kawai 谭艳 Department of Radiology Nagoya City University Graduate School of Medical Science1 Kawasumi Mizuho-choMizuho-kuNagoya 467-8601Japan Department of Radiology Nagoya City University Graduate School of Medical Science1 Kawasumi Mizuho-choMizuho-kuNagoya 467-8601Japanshi

目的前瞻性评估扩散加权(DW)mRI在确定膀胱癌T分期能力和检测表观扩散系数(ADC)与组织学分级之间的联系。方法该研究已获得机构伦理委员会的批准,所有病人均已签署同意书。40例病人共有52个膀胱肿瘤,均进行包括DWI的mRI检查。所有肿瘤... 详细信息

目的前瞻性评估扩散加权(DW)mRI在确定膀胱癌T分期能力和检测表观扩散系数(ADC)与组织学分级之间的联系。方法该研究已获得机构伦理委员会的批准,所有病人均已签署同意书。40例病人共有52个膀胱肿瘤,均进行包括DWI的mRI检查。所有肿瘤均有病理分级。2名放射学专家分析4组影像集(即仅T2WI,T2WI+DWI,T2WI+动态增强影像,T2WI+DWI+动态增强影像)。分析T2WI和增强影像用常规标准。对于DWI,采用新的分期标准,其是在假设肿瘤、黏膜下组织和肌肉分别显示高、低和中等信号的基础上制定的。

关键词：膀胱癌 ADC 膀胱肿瘤组织学分级扩散加权 mRI

采用活体质子mRS对高级别子宫肉瘤中脂质峰的初步观察及其临床价值

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国际医学放射学杂志 2013年第6期 591-591页

作者： m.takeuchi K.matsuzaki m.Harada 郭琪 Department of Radiology University of Tokushima 3-18-15 Kuramoto-choTokushima zip:7708503 Japan

摘要目的评估活体质子mRS成像中脂质峰对子宫肉瘤诊断的临床意义。方法对38例病理学诊断为子宫肿瘤(平滑肌瘤26例,肉瘤12例)的病人在3.0 T mR设备上行

关键词： mRI mRS 子宫肉瘤平滑肌瘤

卵巢肿瘤N-乙酰1共振活体质子3T mR波谱的前期观察及临床价值

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国际医学放射学杂志 2012年第1期 102-102页

作者： m.takeuchi K.matsuzaki m.Harada 刘靖 Department of Radiology University of Tokushima3-18-15Kuramoto-choTokushima 7708503Japan

目的回顾性评价N-乙酰1在2ppm(ppm表示10-6)时活体质子mR波谱鉴别卵巢占位病人黏液和非黏液肿瘤的临床意义。方法对病理诊断卵巢肿瘤的病人进行3TmR波谱成像。从围绕卵巢肿块的单个感兴趣立方体采集单

关键词： mRI mR波谱卵巢肿瘤 N-乙酰黏液化合物定量评估

利用3T mR质子波谱鉴别子宫体肿瘤的良恶性:初步研究

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国际医学放射学杂志 2011年第3期 305-305页

作者： m.takeuchi K.matsuzaki m.Harada 李宁 Department of Radiology University of Tokushima

目的回顾性评价磁共振波谱(mRS)对mRI上所见的子宫体肿瘤的良恶性的鉴别诊断能力。方法经病理学确诊子宫体部良恶性肿瘤的病人均进行盆腔3 T mRS检查。收

关键词： mRI 磁共振波谱子宫体肿瘤胆碱化合物定量评价

In-silico clearing approach for deep refractive index tomography by partial reconstruction and wave-backpropagation

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Light(Science & Applications) 2023年第5期12卷 877-893页

作者： Osamu Yasuhiko Kozo takeuchi Central Research Laboratory Hamamatsu Photonics K.K5000 HirakuchiHamakita-kuHamamatsu 434-8601 ShizuokaJapan

Refractive index(RI)is considered to be a fundamental physical and biophysical parameter in biological imaging,as it governs light-matter interactions and light propagation while reflecting cellular *** tomography enables volumetric visualization of RI distribution,allowing biologically relevant analysis of a ***,multiple scattering(mS)and sample-induced aberration(SIA)caused by the inhomogeneity in RI distribution of a thick sample make its visualization *** paper proposes a deep RI tomographic approach to overcome mS and SIA and allow the enhanced reconstruction of thick samples compared to that enabled by conventional linear-model-based RI *** proposed approach consists of partial RI reconstruction using multiple holograms acquired with angular diversity and their backpropagation using the reconstructed partial RI map,which unambiguously reconstructs the next partial *** this operation efficiently reconstructs the entire RI tomogram while suppressing mS and *** visualized a multicellular spheroid of diameter 140μm within minutes of reconstruction,thereby demonstrating the enhanced deep visualization capability and computational efficiency of the proposed method compared to those of conventional RI ***,we quantified the high-RI structures and morphological changes inside multicellular spheroids,indicating that the proposed method can retrieve biologically relevant information from the RI *** from the excellent biological interpretability of RI distributions,the label-free deep visualization capability of the proposed method facilitates a noninvasive understanding of the architecture and time-course morphological changes of thick multicellular specimens.

关键词： properties refractive overcome

Protective effect of Irsogladine on monochloramineinduced gastric mucosallesions in rats:a comparative study with rebamipide

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World Journal of Gastroenterology 1999年第6期5卷 477-482页

作者： H Yamamoto, m Umeda, H mizoguchi, S Kato and K takeuchi Kyoto Phamaceutical University 日本

AIm To examine the effect of irsogladine, a novel antiulcer drug, on the mucosal ulcerogenic response to monochloramine (NH 2Cl) in rat stomach, in comparison with rebamipide, another antiulcer drug with cytoprotective activity. mETHODS AND RESULTS Oral administration of NH 2Cl (120*!mm) produced severe hemorrhagic lesions in unanesthetized rat stomachs. Both irsogladine ( 1*!mg/*!kg - 10*!mg/*!kg , po ) and rebamipide ( 30*!mg/*!kg - 100*!mg/*!kg , po ) dose dependently prevented the development of these lesions in response to NH 2Cl, the effect of irsogladine was significant at 3*!mg/*!kg or greater, and that of rebamipide only at 100*!mg/*!kg . The protective effect of irsogladine on NH 2Cl induced gastric lesions was significantly reduced by N G nitro L arginine methyl ester (L NAmE) but not by indomethacin, while that of rebamipide was significantly mitigated by indomethacin but not by L NAmE. Topical application of NH 2Cl (20*!mm) caused a marked reduction of potential difference (PD) in ex vivo stomachs. This PD reduction was not affected by mucosal application of irsogladine, but significantly prevented by rebamipide. The mucosal exposure to NH 4OH (120*!mm) also caused a marked PD reduction in the ischemic stomach (bleeding from the carotid artery), resulting in gastric lesions. These ulcerogenic and PD responses caused by NH 4OH plus ischemia were also significantly mitigated by rebamipide, in an indomethacin sensitive manner, while irsogladine potently prevented such lesions without affecting the PD response, in a L NAmE sensitive manner. CONCLUSION These results suggest that ① NH 2Cl generated either exogenously or endogenously damages the gastric mucosa, ② both irsogladine and rebamipide protect the stomach against injury caused by NH 2Cl, and ③ the mechanism underlying the protective action of irsogladine is partly mediated by endogenous nitric oxide, while that of rebamipide is in part mediated by endogenous prostaglandins.

关键词： irsogladine rebamipide monochloramine gastric mucosal lesions rats comparative study

machine learning super-resolution of laboratory CT images in all-solid-state batteries using synchrotron radiation CT as training data

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Energy and AI 2023年第4期14卷 612-619页

作者： m.Kodama A.takeuchi m.Uesugi S.Hirai Tokyo Institute of Technology 2-12-1 OokayamaMeguro-kuTokyo 152-8550Japan Japan Synchrotron Radiation Research Institute(JASRI/SPring-8) 1-1-1 KoutoSayoHyogo 679-5198Japan

High-performance all-solid-state lithium-ion batteries require observation,control,and optimization of the electrode structure.X-ray computational tomography(CT)is an effective nondestructive method for observing the electrode structure in three ***,the limited availability of synchrotron radiation CT,which offers high-resolution imaging with a high signal-to-noise ratio,makes it difficult to conduct experiments and restricts the use of X-ray CT in battery ***,laboratory CT systems are widely available,but they use X-rays emitted from a metal target,resulting in lower image quality and resolution compared with synchrotron radiation *** study explores a method for achieving comparable resolution in laboratory CT images of all-solid-state batteries to that of synchrotron radiation *** method involves using the synchrotron radiation CT images as training data for machine learning *** results demonstrate that,by employing an appropriate machine learning algorithm and activation function,along with a sufficiently deep network,the image quality of laboratory CT becomes equivalent to that of synchrotron radiation CT.

关键词： All-solid-state lithium-ion battery X-ray CT Laboratory CT Synchrotron radiation CT Super-resolution machine learning

Point Sources Identification Problems for Heat Equations

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Communications in Computational Physics 2009年第5期5卷 897-913页

作者： Leevan Ling Tomoya takeuchi Department of mathematics Hong Kong Baptist UniversityKowloon TongHong Kong Graduate School of mathematical Sciences University of Tokyo3-8-1 KomabaMeguroTokyo153-8914Japan

We considered the point source identification problems for heat equations from noisy observation data taken at the minimum number of spatially fixed measurement *** aim to identify the unknown number of sources and their locations along with their *** our previous work,we proved that minimum measurement points needed under the noise-free *** this paper,we extend the proof to cover the noisy cases over a border class of source *** show that if the regularization parameter is chosen properly,the problem can be transformed into a poles identification problem.A reconstruction scheme is proposed on the basis of the developed theoretical *** demonstrations in 2D and 3D conclude the paper.

关键词： Point source source identification heat equations noisy data convergence