KEIO RESEARCHERS INFORMATION SYSTEM

Papers 【 Display / hide 】

Papers 【 Display / hide 】

• Free-breathing Three-dimensional MR Cholangiopancreatography Using Centric k-space Encoding Improved Gallbladder Visualization: A Prospective Study

  Junya Tsuzaki, Taiki Nozaki, Daiki Ito, Tetsushi Habe, Sayaka Miyazaki, Manabu Arai, Manabu Hase, Hiroki Sakata, Ryo Tsukada, Yoshitake Yamada, Masahiro Jinzaki

  Magnetic Resonance in Medical Sciences (Japanese Society for Magnetic Resonance in Medicine)  advpub ( 0 )  2026.02

  Lead author, Last author, Corresponding author,  ISSN  1347-3182

  　View Summary

  <p>Purpose: MR cholangiopancreatography (MRCP) often suffers from signal loss because of concentrated bile. Gradient-and-spin-echo (GRASE) MRCP reduces this effect but is limited by breath-holding. We developed MRCP with centric order encoding (MRCP-CORE), a novel free-breathing sequence with shorter TE using centric k-space trajectory, T2 preparation, and velocity encoding, and evaluated its ability to visualize gallbladder.</p><p>Methods: In this prospective, single-center study, we enrolled 100 consecutive patients who underwent 3 MRCP sequences (MRCP-CORE, conventional MRCP, and GRASE MRCP) on a 3T system. Two blinded radiologists independently assessed the visibility of anatomical structures, artifacts, and overall image quality. SNR, contrast-to-noise ratio, and contrast ratio of the periductal tissue and gallbladder were measured. The Friedman test was used for comparisons; Jonckheere–Terpstra analysis tested the association between the gallbladder visibility and quantitative metrics.</p><p>Results: Ninety-nine patients (mean age, 68.5 ± 10.9 years; 52 men, 47 women) were evaluated. MRCP-CORE showed significantly higher SNR than conventional and GRASE MRCP (20.9 vs. 17.3 vs. 15.8; <i>P</i> < 0.001). Gallbladder visibility was significantly higher with MRCP-CORE than via conventional MRCP (<i>P</i> = 0.02) and comparable to that via GRASE MRCP (<i>P</i> = 1.00). No significant differences in artifact and overall image quality were observed among sequences. Trend analysis revealed gallbladder visibility was significantly influenced by bile concentration in conventional MRCP (<i>P</i> < 0.001), but not in MRCP-CORE (<i>P</i> = 0.12) or GRASE MRCP (<i>P</i> = 0.43).</p><p>Conclusion: MRCP-CORE enhanced gallbladder depiction compared with conventional MRCP, offering a robust free-breathing alternative to breath-hold GRASE MRCP.</p>

  • Access to Document (DOI)
  • CiNii Research

• Incidence and Clinical Course of Lower-Limb Lymphedema after Intranodal n-Butyl-2-Cyanoacrylate Embolization for Postoperative Lymphorrhea

  Jitsuro Tsukada, Masanori Inoue, Masashi Tamura, Hideyuki Torikai, Hiroki Yoshikawa, Mamina Miyabayashi, Junya Tsuzaki, Togo Kogo, Yuji Furukawa, Ryo Ogawa, Yosuke Yamamoto, Yushi Suzuki, Nobutake Ito, Seishi Nakatsuka, Masahiro Jinzaki

  Journal of Vascular and Interventional Radiology 37 ( 4 ) 108541 2026.01

  Lead author, Last author, Corresponding author,  ISSN  1051-0443

  　View Summary

  Purpose: To evaluate the incidence and clinical course of lower-limb lymphedema following intranodal n-butyl-2-cyanoacrylate (nBCA) embolization of the inguinal lymph nodes for postoperative lymphorrhea. Materials and Methods: This retrospective study included 26 patients (24 men and 2 women; age, 69.5 years) who underwent intranodal nBCA embolization for postoperative lymphorrhea between 2017 and 2023. Under ultrasound (US) guidance, inguinal lymph nodes were punctured, and embolization was performed with nBCA and ethiodized oil at a 2:1 ratio (ethiodized oil:nBCA). The primary approach was to embolize through the initially accessed lymph node when the efferent channel and leakage site were visualized. Clinical success was defined as improvement of lymphorrhea-related symptoms with catheter removal or ≥80% drainage reduction within 21 days. Lower-limb lymphedema was defined as new-onset or worsening of existing edema in 60 days after embolization and categorized as reversible or persistent. Results: Clinical success was achieved in 24 of 26 patients (92.3%), with a median time to resolution of 6 days (range, 2–21 days). Lower-limb lymphedema worsened in 6 patients (23.1%), including 4 reversible and 2 persistent cases. No new-onset lymphedema occurred; all represented exacerbation of pre-existing edema. Both persistent cases involved patients with prior pelvic lymph node dissection. No procedure-related deaths or major complications occurred. Conclusion: Inguinal intranodal nBCA embolization effectively controls postoperative lymphorrhea but may worsen pre-existing lower-limb lymphedema, particularly in patients with prior pelvic lymph node dissection. To minimize nontarget embolization of lower-extremity drainage pathways, lymphatic embolization should be performed as selectively and as close to the leakage site as possible.

  • Access to Document (DOI)

• Efficacy of three-dimensional fast spin echo t2-weighted magnetic resonance imaging (cube) for evaluating the longitudinal spread of perihilar cholangiocarcinoma after endoscopic biliary stenting: a diagnostic study.

  Sonoda K., Abe Y., Yokoyama Y., Tsuzaki J., Okuda S., Ueno A., Takemura R., Kitago M., Hasegawa Y., Hori S., Tanaka M., Nakano Y., Okita H., Jinzaki M., Kitagawa Y.

  International journal of surgery (London, England) 112 ( 1 ) 325 - 332 2025.09

  Lead author, Last author, Corresponding author,  ISSN  1743-9191

  • Access to Document (DOI)

• Pearls and pitfalls in imaging of axial spondyloarthritis for rheumatologists.

  Taiki Nozaki, Yuko Tsujioka, Hideharu Sugimoto, Yoshitake Yamada, Minoru Yamada, Youichi Yokoyama, Hitomi Fujishiro, Akimoto Nimura, Junya Tsuzaki, Manabu Hase, Masato Okada, Yuko Kaneko, Masahiro Jinzaki

  Modern rheumatology 35 ( 4 ) 612 - 625 2025.07

  ISSN  14397595

  　View Summary

  This review provides key insights into sacroiliitis imaging, covering anatomy, imaging techniques, and interpretation. It focuses on normal physiological changes in young to middle-aged women, children, and the elderly that can resemble sacroiliitis. We emphasize the importance of distinguishing between active and structural lesions, as highlighted in the recent ASAS-SPARTAN standardized magnetic resonance imaging protocol. Physicians should be aware that bone marrow oedema signals on magnetic resonance imaging, a hallmark of active inflammation in axial spondyloarthritis, can also be observed in young to middle-aged women, especially postpartum, even without spondyloarthritis. Paediatric sacroiliac joints may show changes mimicking inflammation due to ongoing bone growth. Furthermore, degenerative changes in the sacroiliac joint are common with advancing age and can be mistaken for sacroiliitis or interpreted as structural changes. The presence of accessory sacroiliac joints, prone to degeneration, further complicates diagnosis. Accurate interpretation requires considering these normal variations to avoid misdiagnosing spondyloarthritis. Collaboration between clinicians and radiologists is crucial, especially when encountering atypical or clinically inconsistent findings.

  • Access to Document (DOI)

• 【腹部の最新画像情報2025】胆管内乳頭状腫瘍　原発性硬化性胆管炎の経過中に肝破裂と腹膜播種を起こした1例

  屋代 香絵, 山田 祥岳, 津崎 盾哉, 池田 織人, 新妻 雄介, 山田 実加, 城谷 良太, 真杉 洋平, 上野 彰久, 田中 真之, 平田 賢郎, 陣崎 雅弘

  臨床放射線 (金原出版(株))  70 ( 4 ) 559 - 566 2025.07

  Lead author, Last author, Corresponding author,  ISSN  0009-9252

  　View Summary

  ＜文献概要＞今回我々は,原発性硬化性胆管炎(primary sclerosing cholangitis:PSC)の経過観察中に胆管内乳頭状腫瘍(intraductal papillary neoplasm of the bile duct:IPNB)を生じ,肝破裂と腹膜播種をきたしたと考えられるまれな症例を経験したので報告する。

display all >>

Reviews, Commentaries, etc. 【 Display / hide 】

Reviews, Commentaries, etc. 【 Display / hide 】

• 腹部MRIでみる高速化撮像法の使い方

  津崎 盾哉

  断層映像研究会雑誌 (断層映像研究会)  52 ( 1 ) 11 - 11 2025.11

  ISSN  0914-8663

• 門脈圧亢進関連疾患に対するIVR治療の未来予想図 受け継ぎ、つながり、広げる、門脈関連IVR 当施設での経験から

  田村 全, 吉川 裕紀, 小川 遼, 竹下 諒, 塚田 実郎, 津崎 盾哉, 古川 裕二, 古後 斗冴, 山本 洋輔, 山崎 裕哉, 小泉 淳, 中塚 誠之, 陣崎 雅弘

  日本門脈圧亢進症学会雑誌 ((一社)日本門脈圧亢進症学会)  31 ( 3 ) 111 - 111 2025.08

  ISSN  1344-8447

• 特集 腹部の最新画像情報2025 胆管内乳頭状腫瘍:原発性硬化性胆管炎の経過中に肝破裂と腹膜播種を起こした1例

  屋代 香絵, 山田 祥岳, 津崎 盾哉, 池田 織人, 新妻 雄介, 山田 実加, 城谷 良太, 真杉 洋平, 上野 彰久, 田中 真之, 平田 賢郎, 陣崎 雅弘

  臨床放射線 (金原出版)  70 ( 4 ) 559 - 566 2025.07

  ISSN  0009-9252

  • Access to Document (DOI)
  • CiNii Research

• リウマチ専門医のための体軸性脊椎関節炎の画像におけるパールとピットフォール(Pearls and pitfalls in imaging of axial spondyloarthritis for rheumatologists)

  Nozaki Taiki, Tsujioka Yuko, Sugimoto Hideharu, Yamada Yoshitake, Yamada Minoru, Yokoyama Youichi, Fujishiro Hitomi, Nimura Akimoto, Tsuzaki Junya, Hase Manabu, Okada Masato, Kaneko Yuko, Jinzaki Masahiro

  Modern Rheumatology (Oxford University Press)  35 ( 4 ) 612 - 625 2025.07

  ISSN  1439-7595

• CT- and Ultrasound-Guided Drainage Using Drainaway: A Single-Center Experience of 51 Cases(タイトル和訳中)

  Yamamoto Yosuke, Tsukada Jitsuro, Tamura Masashi, Yokotsuka Shinnosuke, Onishi Masaki, Togawa Koji, Ogawa Ryo, Furukawa Yuji, Kogo Togo, Tsuzaki Junya, Yoshikawa Hiroki, Miyabayashi Mamina, Maeshima Katsuya, Jinzaki Masahiro, Nakatsuka Seishi

  日本インターベンショナルラジオロジー学会雑誌 ((一社)日本インターベンショナルラジオロジー学会)  40 ( Suppl. ) 235 - 235 2025.05

  ISSN  1340-4520

display all >>

Intellectual Property Rights, etc. 【 Display / hide 】

Intellectual Property Rights, etc. 【 Display / hide 】

• 併用抗がん剤の感受性判定マーカー

  Date applied： 特願2018-140928  2018.07 

  Date announced： 特開2018-194556  2018.12 

  Patent

• 併用抗がん剤の感受性判定マーカー

  Date applied： 特願2018-140928  2018.07 

  Date announced： 特開2018-194556  2018.12 

  Date issued： 特許第6527994号 

  Date registered： 2019.05

  Patent

• 併用抗がん剤の感受性判定マーカー

  Date applied： 特願2018-140929  2018.07 

  Date announced： 特開2018-169409  2018.11 

  Patent

• 併用抗がん剤の感受性判定マーカー

  Date applied： 特願2017-092161  2017.05 

  Date announced： 特開2017-173334  2017.09 

  Patent

• 併用抗がん剤の感受性判定マーカー

  Date applied： JP2013054488  2013.02 

  Date published： WO2013-125675  2013.08 

  Patent

display all >>