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Application of Scanning Acoustic Microscopy for Detection of Dental Caries Lesion

Open Journal of Stomatology 2023年第1期13卷 12-24页

作者： Yukihiro Naganuma kouki hatori Masahiro Iikubo Masatoshi Takahashi Yoshihiro Hagiwara Kazuto Kobayashi Atsushi Takahashi Kumi Hoshi Yoshifumi Saijo Keiichi Sasaki Clinics of Dentistry for Disabled Tohoku University Hospital Sendai Japan Department of Prosthetic Dentistry Ohu University School of Dentistry Koriyama Japan Division of Dental Informatics and Radiology Tohoku University Graduate School of Dentistry Sendai Japan Division of Dental Biomaterials Tohoku University Graduate School of Dentistry Sendai Japan Department of Orthopaedic Surgery Tohoku University School of Medicine Sendai Japan Honda Electronics Co. Ltd. Toyohashi Japan Biomedical Imaging Laboratory Graduate School of Biomedical Engineering Tohoku University Sendai Japan Division of Advanced Prosthetic Dentistry Tohoku University Graduate School of Dentistry Sendai Japan

Introduction: A scanning acoustic microscope (SAM) is an apparatus for imaging acoustic properties. This apparatus can non-invasively and rapidly evaluate the hardness of materials in the elastic region. This device shows great potential for the diagnosis of dental caries in the clinical setting. However, since the tissue elastic modulus measured using a SAM is a property of the elastic region and the Knoop hardness is a property of the plastic region, the hardness properties differ completely. Therefore, we investigated whether the acoustic impedance measured using a SAM is related to the Knoop hardness, which is used as the standard for removal of carious dentin. Method: Polished sections were prepared from 20 extracted carious wisdom teeth. The acoustic impedance and Knoop hardness were measured for each section. In addition to comparing carious and healthy dentin in SAM images, we evaluated the difference between the carious and healthy dentin in terms of the acoustic impedance and Knoop hardness. We also evaluated the correlation between the Knoop hardness and acoustic impedance. Results: The SAM images were visualized as two-dimensional color images based on the acoustic impedance values. The mean acoustic impedance of carious dentin was significantly lower than that of healthy dentin, showing a similar trend as Knoop hardness. A strong correlation was observed between the two. Discussion: The acoustic impedance values obtained through acoustic microscopy differed significantly between carious and sound dentin. Both types of dentins were visualized using two-dimensional color images. A strong correlation was observed between the acoustic impedance value, which indicates the hardness of the elastic region, and the Knoop hardness, which indicates the hardness of the plastic region. The results of the present study indicate that acoustic impedance accurately reflects the hardness of dentin.

关键词： Scanning Acoustic Microscope Acoustic Impedance Caries Knoop Hardness

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A Multi-Section Quantum-Dot Semiconductor Optical Amplifier for Ultrabroad-Band Gain-Flattened Low-Noise Amplification

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光学学报 2003年第S1期23卷 459-460页

作者： Tomoyuki Akiyama Mitsuru Sugawara Koji Otsubo Hiroji Ebe Nobuaki hatori Yasuhiko Arakawa Fujitsu Ltd. Kanagawa JapanUniversity of Tokyo Tokyo JapanFujitsu Ltd. Kanagawa JapanUniversity of Tokyo Tokyo JapanUniversity of Tokyo Tokyo JapanUniversity of Tokyo Tokyo Japan

We propose an ultrabroad-band 1R regenerator utilizing a multi-section quantum-dot semiconductor optical amplifier. Due to the reduced electron states, quantum dot is beneficial in broadening the gain spectrum and lowering the noise figure. Combining this with a multi-section structure drastically improves the gain equality among the different bound states, leading to an increase in the maximum output power and an improvement of the noise figure.

关键词： for in of be it A Multi-Section Quantum-Dot Semiconductor Optical Amplifier for Ultrabroad-Band Gain-Flattened Low-Noise Amplification MOP SOA NF dBm QDs

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Clinical significance of programmed cell death-ligand expression in small bowel adenocarcinoma is determined by the tumor microenvironment

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World Journal of Gastroenterology 2023年第40期29卷 5566-5581页

作者： Aitoshi Hoshimoto Atsushi Tatsuguchi Ryohei Hamakubo Takayoshi Nishimoto Jun Omori Naohiko Akimoto Shu Tanaka Shunji Fujimori Tsutomu hatori Akira Shimizu Katsuhiko Iwakiri Department of Gastroenterology Nippon Medical SchoolTokyo 113-8603Japan Department of Analytic Human Pathology Nippon Medical SchoolTokyo 113-8603Japan Department of Pathology Nippon Medical SchoolChiba Hokusoh HospitalChiba 270-1694Japan

BACKGROUND Comprehensive genomic analysis has shown that small bowel adenocarcinoma(SBA)has different genomic profiles from gastric and colorectal ***,it is essential to establish chemotherapeutic regimens based on SBA *** expression of programmed cell death-ligand 1(PD-L1)and programmed cell death-ligand 2(PD-L2)in SBA is not fully ***-PD-L1/PD-1 therapy uses tumor-infiltrating lymphocytes(TILs);therefore,the status of TILs in the tumor microenvironment(TME)may influence their *** ratio of FoxP3+to CD8+T cells has been reported to be useful in predicting the prognosis of digestive system *** To investigate the clinicopathological significance of PD-L1/2 expression according to the status of TILs in SBA *** We performed immunohistochemical analysis for PD-L1,PD-L2,CD8,FoxP3,and DNA mismatch repair(MMR)proteins using formalin-fixed,paraffin-embedded tissues from 50 patients diagnosed with primary *** immunoreactivities of PD-L1 and PD-L2 were determined separately in tumor cells and tumor-infiltrating immune cells throughout the tumor center and invasive margins,and finally evaluated using the combined positive score(CPS).We assessed CD8+and FoxP3+T cells in the intratumoral and tumor-surrounding ***,we calculated and summed the ratio of FoxP3 to CD8+T cell ***-related cell densities were graded as low or *** results were compared with clinicopathological factors and patient *** distribution of cancer-specific survival(CSS)was estimated using the Kaplan–Meier method,and the log-rank test was used to test for significant differences in CSS.A Cox proportional hazard model was also used to assess the effect of tumor variables on *** PD-L1 expression was positive in 34%in tumor cells(T-PD-L1)and 54%in tumor-infiltrating immune cells(I-PDL1)of the cases examined.T-PD-L2 was positive in 34%and I-PD-L2 was positive in 42%of the ***-L1

关键词： Small bowel adenocarcinoma Programmed cell death-ligand 1 Programmed cell death-ligand 2 Tumor microenvironment Tumor-infiltrating lymphocytes Regulatory T-cells

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A Dependence of Crystallinity of In2O3 Thin Films by a Two-Step Heat Treatment of Indium Films on the Heating Atmosphere

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Journal of Modern Physics 2010年第6期1卷 360-363页

作者： Yuichi Sato Fumito Otake Hirotoshi hatori 不详

A difference in crystallinity of In2O3 thin films on sapphire substrates by heat treatment of indium films was reported. Indium films were heated in an inert atmosphere or in air until they reached a specified temperature and then oxidized in air at much higher temperatures. Crystallinity of the In2O3 thin film which was heat-treated in air from room temperature was quite poor. On the other hand, narrow X-ray rocking curves of the In2O3 films were obtained when the temperature was increased in an inert atmosphere to a specified tem-perature.

关键词： Solid Phase Epitaxy Oxides Sapphire Semiconducting Materials

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Collagen-Based Fuel Cell and Its Proton Transfer

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Materials Sciences and Applications 2017年第11期8卷 747-756页

作者： Yasumitsu Matsuo Hiroki Ikeda Takashi Kawabata Junko hatori Hiroshi Oyama Department of Life Science Faculty of Science & Engineering Setsunan University Neyagawa Japan

We have fabricated the fuel cell based on the tissue derived biomaterial “collagen” and investigated its proton transfer. It was found that “collagen” becomes the electrolyte of fuel cell in the humidified condition. The power density of the fuel cell becomes typically 8.6 W/m2 in the 80% humidity. Further, these results indicate that collagen exhibits proton conductivity in the humidified condition. Both of proton conductivity and dielectric constant increase by the increase of humidity. From the analyses of the frequency dependence of AC conductivity, it was found that proton conductivity and the dielectric dispersion observed in the humidified condition are caused by the formation of the water bridge, which is bonded with the collagen peptide chain. Considering that hydration induces the formation of the water bridge and that increases proton conductivity and dielectric constant, it is deduced that proton transfer in the fuel cell based on collagen is caused by the breaking and rearrangement of hydrogen bond in the water bridge.

关键词： Fuel Cell Proton Conductor Electrolyte Biomaterials

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Development of Breakup Model for Large Eddy Simulation of Diesel Spray

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Journal of Energy and Power Engineering 2013年第12期7卷 2312-2320页

作者： Tatsunori Fujii Koji Kitaguchi Soichi hatori Tsukasa Hori Jiro Senda Department of Mechanical Engineering Doshisha University Kyoto 610-0394 Japan Department of Mechanical Engineering Osaka University Osaka 565-0871 Japan

Diesel spray is injected at high pressure. So, upper stream region of spray is high Weber number condition. However, even if the fuel is injected at high pressure, the downstream region of spray is corresponding to relatively low Weber number condition. Thus, KH （Kelvin-Helmholtz） model modeled for high Weber number conditions and MTAB （modified Taylor analogy breakup） model are used for primary and secondary breakup processes respectively. This study is focused on the development of new hybrid breakup model The calculations are performed by LES （large eddy simulation） incorporated into KIVA code. LES of non-evaporating diesel spray are performed using KH ＆ RT （Rayleigh-Taylor） model, MTAB model and KH-MTAB model. Then, LES with these models were compared with experimental results. As the result, the availability of KH-MTAB model is showed. It is found that KH-MTAB is good agreement with experimental results of penetration and SMD （Sauter mean diameter） in relatively low density conditions.

关键词： Diesel spray spray structure large eddy simulation breakup model KH-MTAB model.

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Saliva protein profiles to identify oral cancer patients

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中国口腔颌面外科杂志 2008年第B5期6卷 80-81页

作者： Satoru Shintani Hiroshi hatori Takahiko Toyoshima Yoshiya Ueyama Hiroyuki Hamakawa Department of Oral & Maxillofacial Surgery Showa Univ. School of Dentistrt Tokyo JAPAN Department of Oral & Maxillofacial Surgery Yamaguchi Univ. School of Medicine Yarnaguchi Japan Department of Oral & Maxillofacial Surgery Showa Univ. School of Medicine Ehime Japan

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Multichannel and high-density hybrid integrated light source with a laser diode array on a silicon optical waveguide platform for interchip optical interconnection

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Photonics Research 2014年第3期2卷 S0019-S0024页

作者： Takanori Shimizu Nobuaki hatori Makoto Okano Masashige Ishizaka Yutaka Urino Tsuyoshi Yamamoto Masahiko Mori Takahiro Nakamura Yashuhiko Arakawa Institute for Photonics-Electronics Convergence System Technology(PECST) Japan Photonics Electronics Technology Research Association(PETRA) West 7SCR16-1 OnogawaTsukubaIbaraki 305-8569Japan National Institute of Advanced Industrial Science and Technology(AIST) West 7SCR16-1 OnogawaTsukubaIbaraki 305-8569Japan Institute of Industrial Science The University of Tokyo4-6-1 KomabaMeguroTokyo 153-8505Japan

A hybrid integrated light source was developed with a configuration in which a laser diode(LD)array was mounted on a silicon optical waveguide platform for interchip optical *** integrated light source is composed of 13-channel stripes with a pitch of 20 or 30μ*** output power of each LD in the 400 or 600-μm long LD array was over 40 mW at room temperature without *** output power uniformity was 1.3 dB including an LD array power *** use of a SiON waveguide with a spot size converter resulted in an optical coupling loss of 1 dB between an LD and SiON *** integrated light source including 52 output ports demonstrated a reduction in the footprint per *** also demonstrated a light source with over 100 output ports in which the number of output ports is increased by using a waveguide splitter and multichip *** integrated light sources are practical candidates for use with photonic integrated circuits for high-density optical interconnection.

关键词： waveguide interconnection optical

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小腿骨性纤维结构不良样釉质瘤发展成经典型釉质瘤1例报告(英)

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诊断病理学杂志 2007年第4期14卷 274-274,284页

作者： hatori M 丁宜（译）黄啸原（校）不详北京积水谭医院病理科

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Development of a highly-specific ^(18)F-labeled irreversible positron emission tomography tracer for monoacylglycerol lipase mapping

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Acta Pharmaceutica Sinica B 2021年第6期11卷 1686-1695页

作者： Zhen Chen Wakana Mori Jian Rong Michael A.Schafroth Tuo Shao Richard S.Van Daisuke Ogasawara Tomoteru Yamasaki Atsuto Hiraishi Akiko hatori Jiahui Chen Yiding Zhang Kuan Hu Masayuki Fujinaga Jiyun Sun Qingzhen Yu Thomas L.Collier Yihan Shao Benjamin F.Cravatt Lee Josephson Ming-Rong Zhang Steven H.Liang Division of Nuclear Medicine and Molecular Imaging Massachusetts General Hospital&Department of RadiologyHarvard Medical SchoolBostonMA 02114USA Department of Advanced Nuclear Medicine Sciences National Institute of Radiological SciencesNational Institutes for Quantum and Radiological Science and TechnologyChiba 263-8555Japan The Skaggs Institute for Chemical Biology and Department of Chemical Physiology The Scripps Research InstituteLa JollaCA 92037USA Department of Chemistry and Biochemistry University of OklahomaNormanOK 73019USA

As a serine hydrolase,monoacylglycerol lipase(MAGL) is principally responsible for the metabolism of 2-arachidonoylglycerol(2-AG) in the central nervous system(CNS),leading to the formation of arachidonic acid(AA).Dysfunction of MAGL has been associated with multiple CNS disorders and symptoms,including neuroinflammation,cognitive impairment,epileptogenesis,nociception and neurodegenerative *** of MAGL provides a promising therapeutic direction for the treatment of these conditions,and a MAGL positron emission tomography(PET) probe would greatly facilitate preclinical and clinical development of MAGL ***,we design and synthesize a small library of fluoropyridyl-containing MAGL inhibitor *** evaluation of these candidates by activity-based protein profiling identified 14 as a lead compound,which was then radiolabeled with fluorine-18 via a facile SNAr reaction to form 2-[^(18)F]fluoropyridine *** blood-brain barrier permeability and high in vivo specific binding was demonstrated for radioligand [^(18)F]14(also named as [^(18)F]MAGL-1902).This work may serve as a roadmap for clinical translation and further design of potent 18F-labeled MAGL PET tracers.

关键词： Monoacylglycerol lipase(MAGL) Central nervous system(CNS) 2-Arachidonylglycerol(2-AG) Arachidonic acid(AA) Positron emission tomography(PET) Fluorine-18

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