中野 和也 (ナカノ カズヤ)

NAKANO Kazuya

写真a

所属

キャリアマネジメント推進機構 テニュアトラック推進室

職名

助教

外部リンク

 

論文 【 表示 / 非表示

  • Vascular Roadmap Generation by Registration and Blending of Multiple Enhanced X-ray Angiograms

    Kawabe M., Ohnishi T., Nakano K., Kato H., Ooka Y., Haneishi H.

    IEEE Access   9   36356 - 36367   2021年

     詳細を見る

    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:IEEE Access  

    In catheterization for hepatoma, contrast areas in X-ray angiograms are enhanced to visualize the blood vessel structures. However, it is difficult to observe the entire blood vessel in several cases due to an incomplete contrast filling during imaging. The present paper generates a vascular roadmap that enables visualization of an entire blood vessel by combining multiple enhanced images. Since images of different temporal phases are distorted by body motion, corrections by non-rigid registration are needed. We first estimated the feature-based deformations between temporally adjacent images. Then, we registered temporally distant images by accumulating the images. Finally, the vascular roadmap was generated by blending the motion-corrected images. The proposed method was applied to 13 angiograms and was compared with other registration methods. As a result, the proposed method achieved efficient deformation with a shorter processing time and generated a vascular roadmap with improved vascular structure visibility.

    DOI: 10.1109/ACCESS.2021.3062834

    Scopus

  • Motion picture acquisition and analysis of microcirculation in septic model rats

    Kawasaki M., Nakano K., Ohnishi T., Sekine M., Watanabe E., Oda S., Nakada T.A., Haneishi H.

    Progress in Biomedical Optics and Imaging - Proceedings of SPIE   11631   2021年

     詳細を見る

    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Progress in Biomedical Optics and Imaging - Proceedings of SPIE  

    Microcirculation plays an important role by supplying oxygen and nutrients to maintain our lives. It is known that, as pathogenesis of sepsis, the microcirculation is impaired at the early stage of sepsis. In this case, it is expected that thrombomodulin alfa (TM alfa) works for the recovery of microcirculation. Direct observation of the impairment and recovery of microcirculation related to sepsis may give us clear understanding of those phenomena. In this study, we conducted experiments to observe microcirculation of septic model rats with an optical system. In these experiments, by attaching a chamber to the back of each rat, the same region of the microcirculation was consecutively monitored. Then, these rats were divided into three groups: control model rats (sham group), septic model rats (diseased group), and septic model rats to which TM alfa was administered (treated group). Each group includes five rats. In the diseased group smaller vessels disappeared and larger vessels became thinner. On the other hand, the treated group showed at first the degradation of microcirculation then the recovery. This may indicate effectiveness of TM alfa. We also estimated the blood velocity and blood vessel diameter from the acquired motion pictures to evaluate condition of the microcirculation. As a result, we quantitatively confirmed while blood velocity and blood vessel diameter of the diseased group decreased, that of the treated group decreased and then recovered. It should be noted that the set of motion pictures obtained in these experiments has potentially useful information for further analysis and is to be open to relevant researchers.

    DOI: 10.1117/12.2581275

    Scopus

  • Design of a system combining narrow band illuminants and a color camera for early diagnosis of skin flap necrosis

    Kurabuchi Y., Nakano K., Ohnishi T., Nakaguchi T., Akita S., Hauta-Kasari M., Haneishi H.

    Progress in Biomedical Optics and Imaging - Proceedings of SPIE   11631   2021年

     詳細を見る

    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Progress in Biomedical Optics and Imaging - Proceedings of SPIE  

    In plastic surgery, free tissue graft procedures are an essential part of fixing tissue-lack injuries or diseases. However, tissue necrosis caused by vascular occlusions or poor vascular anastomosis is a severe problem for prognosis. Follow-up surgery in the early-stage of necrosis caused by congestion or ischemia is essential to salvage the tissue, but making a diagnosis is difficult because of the slight features of these states. Therefore, a diagnosis support system that can capture the features of blood circulation of the skin flap is required to improve prognosis. We focused on system design and analysis by using spectral characteristics of blood circulation of a skin flap for this purpose. The system to be constructed is composed of a two-channel narrow-band illuminant and a color camera and can capture six-channel spectral signals. The narrow-band illuminant is designed by combining 13 kinds of light-emitting diode (LED) spectra. In this study, we first measured reflectance spectra of the early-stage skin flap necrosis of the rat model to design the narrow-band illuminant spectra. We blocked the flow of the target vessel and observed necrosis progression. A prototyped skin flap chamber was used for stable observation of spectral reflectance measurements. An evaluation experiment was conducted using a color camera and the spectrally tunable light source. Skin flap images were captured under the designed-illuminants and a conventional illuminant reproduced by the spectrally tunable light source. We confirmed the effectiveness of the designed system by improvements in necrosis region detection.

    DOI: 10.1117/12.2576782

    Scopus

  • Design of Multiband Switching Illumination With Low-Concentration Lugol Stain for Esophageal Cancer Detection

    Kazuya Nakano, Yu Saito, Yoko Kurabuchi, Takashi Ohnishi, Satoshi Ota, Masaya Uesato, Hideaki Haneishi

    IEEE Access   8   216043 - 216054   2020年11月

     詳細を見る

    記述言語:日本語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Institute of Electrical and Electronics Engineers (IEEE)  

    DOI: 10.1109/access.2020.3041229

    researchmap

  • Analysis of singular phase based on double random phase encoding using phase retrieval algorithm 査読あり

    Nakano K., Suzuki H.

    Optics and Lasers in Engineering   134   2020年11月

     詳細を見る

    記述言語:英語   掲載種別:研究論文(学術雑誌)   出版者・発行元:Optics and Lasers in Engineering  

    © 2020 We analyze the properties of the singular phase based on phase retrieval. The phase can be estimated from the result of the known-plaintext attack on a typical optical encryption technique, namely double random phase encoding. The key generated by the singular phase for decryption can be used to decrypt only the known ciphertext image used for the attack. However, it is not obvious whether any unknown ciphertext image can be decrypted using the singular key (a phase key image that has the singular property). Therefore, we prepared various ciphertext images by changing two parameters, namely the plaintext image and a random phase mask in the spatial plane, and analyzed the properties of the singular key by decrypting these unknown ciphertext images. The results show that when the unknown ciphertext images generated by changing only the plaintext image are decrypted, the known plaintext pattern is obtained. In contrast, when the unknown ciphertext images generated by changing only the random phase mask are decrypted, no pattern is obtained. These cases both indicate that cryptanalysis failed. Nevertheless, when the known plaintext pattern is obtained, it indicates that the correlation between the known and unknown random phase masks is high, giving the attacker an important clue.

    DOI: 10.1016/j.optlaseng.2020.106300

    Scopus

全件表示 >>

MISC 【 表示 / 非表示

  • 血管コンプライアンス –接触型から非接触型への展開− 招待あり

    中野和也

    日本オプトメカエレクトロニクス協会 光技術コンタクト誌   55 ( 10 )   12 - 20   2017年10月

     詳細を見る

    記述言語:日本語   掲載種別:記事・総説・解説・論説等(学術雑誌)  

  • 2015年日本光学会の研究動向「画像処理」 招待あり

    中野和也

    日本光学会機関紙「光学」   45 ( 4 )   141(23) - 142(24)   2016年4月

     詳細を見る

    記述言語:日本語   掲載種別:記事・総説・解説・論説等(学術雑誌)  

講演・口頭発表等 【 表示 / 非表示

  • Finger region extraction using color of skin for hand-waving finger vein authentication

    Hiroyuki Suzuki, Narissa Ditthapakdijanya, Takashi Komuro, Keiichiro Kagawa, Kazuya Nakano, Takashi Obi

    OPTICS & PHOTONICS International Congress 2021, BISC2021,BISC-4-04, Online 

     詳細を見る

    開催年月日: 2021年4月22日

    記述言語:日本語  

    researchmap

  • Hemodynamics imaging based on digital color images (Invited)

    Kazuya Nakano, Izumi Nishidate

    The 10th Japan-Korea Workshop on Digital Holography & Information Photonics (DHIP 2020) 

     詳細を見る

    開催年月日: 2020年12月18日

    記述言語:日本語  

    researchmap

  • 汎用RGBカラーカメラを用いた非接触バイタルセンシング

    西舘 泉, 泉 拓也, 中野 和也, 羽石 秀昭, 相津 佳永

    レーザー学会第547回研究会報告 RTM-20-17 p.29-32 

     詳細を見る

    開催年月日: 2020年10月9日

    記述言語:日本語  

    researchmap

  • スマートフォンカメラを用いた生体内クロモフォアの 経皮的イメージング

    西舘 泉, 中野 和也, 泉 拓也

    ⼀般社団法⼈電気学会 光・量⼦デバイス研究会 電気学会研究会資料 p.7-11 

     詳細を見る

    開催年月日: 2020年9月28日

    記述言語:日本語  

    researchmap

  • 可視光線に基づく血行動態イメージング

    中野和也

    レーザー学会第546回研究報告 

     詳細を見る

    開催年月日: 2020年9月14日

    記述言語:日本語  

    researchmap

全件表示 >>

受賞 【 表示 / 非表示

  • 第15回FFIT研究奨励賞

    2016年2月   船井情報科学振興財団  

    中野和也

     詳細を見る

    受賞区分:出版社・新聞社・財団等の賞  受賞国:日本国

  • 2010年度 光みらい学生奨励金

    2010年10月   日本光学会   位相限定化した二重ランダム位相暗号化法における 鍵空間分析

    中野和也

     詳細を見る

    受賞区分:国内学会・会議・シンポジウム等の賞  受賞国:日本国

科研費(文科省・学振)獲得実績 【 表示 / 非表示

  • 非接触型指静脈認証の適用範囲拡大に関する研究

    2020年04月 - 2023年03月

    科学研究費補助金  基盤研究(B)

    鈴木 裕之、小室 孝, 香川 景一郎, 中野 和也

  • 光の散乱を利用した開頭が不要な脳蛍光イメージングの実現

    2020年04月 - 2023年03月

    科学研究費補助金  基盤研究(C)

    中野 和也

  • 食道胃腸摘出標本に対するマルチモーダル計測による高次マクロ病理情報の獲得と解析

    2019年04月 - 2022年03月

    科学研究費補助金  基盤研究(A)

    羽石 秀昭、林 秀樹, 池田 純一郎, 大西 峻, 上里 昌也, 中野 和也

  • ディジタルカラー動画像に基づいた非接触型中心血圧計の実現

    2016年04月 - 2018年03月

    科学研究費補助金  若手研究(B)

  • 無拘束計測が可能な血管伸展性の非接触型イメージングの実現

    2014年04月 - 2016年03月

    科学研究費補助金  若手研究(B)

その他競争的資金獲得実績 【 表示 / 非表示

  • 短波近赤外(SWIR)波長域における脈管内流体計測に関する基礎研究

    2017年08月 - 2018年03月

    千葉大学フロンティア医工学センター  千葉大学フロンティア医工学センター萌芽研究プロジェクト 

    中野 和也、中野和也

     詳細を見る

    資金種別:競争的資金

  • ディジタルカラーカメラを用いた非接触型カフレス連続血圧計の開発

    2016年

    公益財団法人精密測定技術振興財団  研究助成 

    中野 和也、中野和也

     詳細を見る

    資金種別:競争的資金