Imanishi, Nobuaki



School of Medicine, Department of Anatomy (Shinanomachi)


Associate Professor

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Papers 【 Display / hide

  • Three-dimensional measurement of the human cadaver foot bone kinematics under axial loading condition using biplane X-ray fluoroscopy

    Ito Kohta, Hosoda Koh, Shimizu Masahiro, Ikemoto Shuhei, Nagura Takeo, Seki Hiroyuki, Kitashiro Masateru, Jinzaki Masahiro, Imanishi Nobuaki, Aiso Sadakazu, Ogihara Naomichi

    Footwear Science 9   S148 - S150 2017.06

    ISSN  1942-4280

  • An anatomical study on the availability of contralateral recipient vessels in hemi-mandibular reconstruction with vascularised free fibula transfer

    Kasai Shogo, Nagasao Tomohisa, Sakamoto Yoshiaki, Shimizu Yusuke, Imanishi Nobuaki, Kishi Kazuo

    Journal of Plastic Surgery and Hand Surgery    1 - 4 2017.02

    ISSN  2000-656X

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    <p>Background: In mandibular reconstruction with vascularised free fibula transfer, there are situations where the neck on the operated site lacks recipient vessels for vascular anastomosis due to previous radiological/surgical interventions. Methods: The present study aims to clarify the availability of neck vessels on the contralateral side in such situations. Experimental surgery was conducted on 20 fresh cadavers (six males and 14 females). After the left half of the mandible was removed, free vascularised fibula of equivalent length was transferred to fill the defect. The possibility of connecting the peroneal artery and vein to the superior thyroid artery (STA), transverse coli artery (TCA), internal jugular vein (IJV), and external jugular vein (EJV) of the contralateral side was evaluated. Results: In all samples, the peroneal vessels could reach the STA and EJV. However, the peroneal vessels could reach the TCA and IJV of the contralateral side in only 45% and 64.2% of cases, respectively. The average and standard deviation of the lengths by which vessels were insufficient were 1.1 ± 13.9 mm for IJV and 8.8 ± 24.7 mm for TCA. Conclusions: In reference to these findings, it is concluded that, in situations where neck vessels of the defect side are unavailable, availability of the superior thyroid artery and external jugular vein should be examined first. When these vessels are available as recipient vessels, direct vascular anastomosis is highly likely to be successful. In cases where these vessels are unavailable and the transverse coli artery or internal jugular vein is used as the recipient, vascular interposition might be necessary.</p>

  • Anatomical Study of Cutaneous Venous Flow of the Palm

    Kim Baek kyu, Kwon Heeyeon, Imanishi Nobuaki, Chang Hak

    Annals of Plastic Surgery  2016.11

    ISSN  0148-7043

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    <p>BACKGROUNDS: Various flaps elevated from the palm have been widely used for finger and hand reconstruction. Recently, perforator-based free flaps or venous free flaps have received popularity due to several advantages. The cutaneous venous system has been chosen as the circulatory outlet when designing and harvesting the flap from the palmer area due to the small size and thin nature of the flap. However, there have been few descriptions about the anatomy of the palmar cutaneous veins. A more detailed knowledge will be valuable for elevating various flaps from the palmar area. METHODS: Whole-body and hand venography with a contrast medium was performed on 9 fresh cadavers. Dissection and investigation of the skin and subcutaneous tissue were performed using a soft x-ray system with a stereogram. During all the processes that involved elevating the tissue, observations were made on the macroscopic structure of the palmar vein. RESULTS: In the palm, a complex network of veins are connected with the distal branches of the cephalic vein, basilic vein, and dorsal venous arch. The pattern and geometric formation of the venous network in all cases showed distinctive features according to each region of the palm. The venous branches create a network extending to palmar margins and webs between fingers. CONCLUSIONS: Venous arrangement should be considered when designing flaps from the palm to prevent venous congestion and safely extend the length of the flap.</p>

  • Comparison of the diagnostic accuracy of FBP, ASiR, and MBIR reconstruction during CT angiography in the evaluation of a vessel phantom with calcified stenosis in a distal superficial femoral artery in a cadaver extremity

    Tsukada Jitsuro, Yamada Minoru, Yamada Yoshitake, Yamazaki Shun, Imanishi Nobuaki, Tamura Kentaro, Hashimoto Masahiro, Nakatsuka Seishi, Jinzaki Masahiro

    Medicine (United States) 95 ( 27 )  2016.07

    ISSN  0025-7974

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    <p>Purpose: To investigate whether adaptive statistical iterative reconstruction (ASiR) or model-based iterative reconstruction (MBIR) improves the diagnostic performance of computed tomography angiography (CTA) for small-vessel calcified lesions relative to filtered back projection (FBP) using cadaver extremities and a calcified stenosis phantom. Methods: A cadaver was used in accordance with our institutional regulations, and a calcified stenosis phantom simulating 4 grades of stenosis was prepared. The phantom was inserted within the distal superficial femoral artery of the cadaver leg. Ten CT images per reconstruction type and stenosis grade were acquired using a 64-slice multidetector-row CTA. As an objective measurement, the first and second derivatives of the CT value function profiles were calculated. As a subjective measurement, 2 blinded reviewers measured the stenosis ratio using a quantitative scale. The Wilcoxon rank-sum test was used to evaluate the data. Results: Objective measurements of both 25% and 50% stenosis differed significantly (P &lt;0.01) between MBIR (25/50%: 25.80/50.30 ± 3.88/3.86%) and FBP (25/50%: 35.60/83.80 ± 3.44/26.10%), whereas significant differences were not observed between ASiR and FBP. Reviewer 2's subjective measurements of 25% stenosis differed significantly (P &lt;0.01) between MBIR (35.13 ± 3.25%) and ASiR (40.89 ± 3.14%), and the measurements of 50% stenosis differed significantly (P &lt;0.01) between MBIR (reviewers 1/2, 62.36/54.78 ± 2.78/4.96%) and FBP (reviewers 1/2, 62.36/74.84 ± 2.78/18.10%). Significant differences in the subjective measurements were not observed between ASiR and FBP. Conclusion: MBIR improves the diagnostic performance of CTA for small-vessel calcified lesions relative to FBP.</p>

  • Venous drainage of the face

    Onishi S., Imanishi N., Yoshimura Y., Inoue Y., Sakamoto Y., Chang H., Okumoto T.

    Journal of Plastic, Reconstructive and Aesthetic Surgery  2016.04

    ISSN  1748-6815

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    <p>The venous anatomy of the face was examined in 12 fresh cadavers. Venograms and arteriovenograms were obtained after the injection of contrast medium. In 8 of the 12 cadavers, a large loop was formed by the facial vein, the supratrochlear vein, and the superficial temporal vein, which became the main trunk vein of the face. In 4 of the 12 cadavers, the superior lateral limb of the loop vein was less well developed. The loop vein generally did not accompany the arteries of the face. Cutaneous branches of the loop vein formed a polygonal venous network in the skin, while communicating branches ran toward deep veins. These findings suggest that blood from the dermis of the face is collected by the polygonal venous network and enters the loop vein through the cutaneous branches, after which blood flows away from the face through the superficial temporal vein, the facial vein, and the communicating branches and enters the deep veins.</p>

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Papers, etc., Registered in KOARA 【 Display / hide

Presentations 【 Display / hide

  • 脛骨骨膜の動脈解剖


    第12回日本形成外科学会基礎学術集会 (盛岡) , 2004.10, Oral Presentation(general)

  • 真皮内細静脈の立体構造


    第12回日本形成外科学会基礎学術集会 (盛岡) , 2004.10, Oral Presentation(general)

  • 褥創ポケット形成メカニズムと新しいステ−ジ分類


    第46回日本形成外科学会総会学術集会 (神戸) , 2004.04, Oral Presentation(general)

  • 鼻翼全層欠損における口輪筋粘膜弁による裏打ち再建法


    第46回日本形成外科学会総会学術集会 (神戸) , 2004.04, Oral Presentation(general)

  • Dorsal intercostal perforator flapの解剖と臨床応用


    第30回日本マイクロサ−ジャリ−学会 (東京) , 2003.11, Oral Presentation(general)

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Awards 【 Display / hide

  • 学術奨励賞 基礎部門

    Imanishi Nobuaki, 2001.04, 日本形成外科学会, Angiographic Study of the Subdermal Plexus: a Preliminary Report

  • 第39回日本形成外科学会総会学術集会 優秀論文賞

    Fukuzumi Satoshi, Nakajima Hideo, Imanish Nobuaki, 1996.04, 日本形成外科学会, The reversed lesser saphenous, sural V-NAF flap による足踵部再建


Courses Taught 【 Display / hide











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