Faculty Profiles - NAGANAWA, Shinji

Papers - NAGANAWA, Shinji

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【中枢神経系の新たな疾患カテゴリーとその画像所見】Glymphaticシステム脳内の老廃物排除のための仕組み

田岡俊昭, 長縄慎二

臨床画像 Vol. 33 ( 12 ) page： 1447 - 1458 2017.12

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：(株)メジカルビュー社

Glymphaticシステムは頭蓋内の脳脊髄液、脳内の間質液を含む循環に関連した1つのコンセプトであり、脳脊髄液の循環に関しての新しい考え方とともに広く受け入れられるようになりつつあり、さまざまな疾患と関連している可能性が指摘されている。(著者抄録)

Other Link： https://search.jamas.or.jp/default/link?pub_year=2017&ichushi_jid=J01843&link_issn=&doc_id=20171201080008&doc_link_id=%2Fap4ringc%2F2017%2F003312%2F009%2F1447-1458%26dl%3D0&url=https%3A%2F%2Fwww.medicalonline.jp%2Fjamas.php%3FGoodsID%3D%2Fap4ringc%2F2017%2F003312%2F009%2F1447-1458%26dl%3D0&type=MedicalOnline&icon=https%3A%2F%2Fjk04.jamas.or.jp%2Ficon%2F00004_2.gif

The Relationship Between Endolymphatic Hydrops in the Vestibule and Low-Frequency Air-Bone Gaps. Reviewed

Satofumi Sugimoto, Tadao Yoshida, Masaaki Teranishi, Yuriko Okazaki, Shinji Naganawa, Michihiko Sone

The Laryngoscope. Vol. 28 ( 7 ) page： 1658 - 1662 2017.11

Letter to editor [Saccular measurements in routine MRI can predict hydrops in Meniele disease] by Simon F et al.

Pablo Dominguez, Shinji Naganawa

Eur Arch Otorhinolaryngol. 2017.11

【局所進行膵癌の治療限界に挑む】局所進行膵癌の術前治療後の画像診断

小川浩, 鈴木耕次郎, 竹原康雄, 長縄慎二

胆と膵 Vol. 38 ( 11 ) page： 1255 - 1260 2017.11

Language：Japanese Publishing type：Research paper (scientific journal) Publisher：医学図書出版(株)

膵癌は、血管浸潤の範囲と遠隔転移・腹膜播種の有無により、切除可能、切除境界、切除不能に分類される。このうち、局所進行膵癌である切除境界および切除不能膵癌に関しては、化学療法あるいは化学放射線療法により癌細胞が減少し、外科的切除が可能となる症例が存在する。膵癌の治療効果判定は、CTやMRI、PETといった画像や、CA19-9などの腫瘍マーカーの推移でみるのが一般的である。ここでは、とくに局所進行膵癌の術前治療後の画像診断について述べ、さらに化学放射線療法後に生じる多彩な画像上の変化についても言及する。(著者抄録)

The retention pattern of THK5351 pet imaging and functional network disruption associated with development of Alzheimer's disease

Yokoi T, Watanabe H, Yamaguchi H, Bagarinao E, Masuda M, Imai K, Ogura A, Ohdake R, Kawabata K, Hara K, Riku Y, Ishigaki S, Katsuno M, Kato K, Naganawa S, Okamura N, Miyao S, Yanai K, Sobue G

JOURNAL OF THE NEUROLOGICAL SCIENCES Vol. 381 page： 960 - 961 2017.10

Improved HYDROPS: Imaging of Endolymphatic Hydrops after Intravenous Administration of Gadolinium. Reviewed

Shinji Naganawa, Hisashi Kawai, Toshiaki Taoka, Michihiko Sone

Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine Vol. 16 ( 4 ) page： 357 - 361 2017.10

Language：English Publishing type：Research paper (scientific journal)

To improve the imaging protocol for the evaluation of endolymphatic hydrops after intravenous administration of a gadolinium-based contrast agent, we modified our previously reported hybrid of reversed image of positive endolymph signal and native image of positive perilymph signal (HYDROPS) method. Although the scan time of the new protocol was half that of the previous one, there were no significant differences between two protocols in the mean contrast noise ratio between the endolymph and perilymph and the area ratio of the endolymph size values in nine patients.

DOI： 10.2463/mrms.tn.2016-0126

Web of Science

PubMed

Improved HYDROPS: Imaging of Endolymphatic Hydrops after Intravenous Administration of Gadolinium. Reviewed

Shinji Naganawa, Hisashi Kawai, Toshiaki Taoka, Michihiko Sone

Magn Reson Med Sci. ( 16 ) page： 357-361 2017.10

Three-dimensional printer-generated patient-specific phantom for artificial in vivo dosimetry in radiotherapy quality assurance. Reviewed

Takeshi Kamomae, Hidetoshi Shimizu, Takayoshi Nakaya, Kuniyasu Okudaira, Takahiro Aoyama, Hiroshi Oguchi, Masataka Komori, Mariko Kawamura, Kazuhiro Ohtakara, Hajime Monzen, Yoshiyuki Itoh, Shinji Naganawa

Phys Med. 2017.10

Longitudinal Up-Regulation of Endolymphatic Hydrops in Patients with Meniere's Disease During Medical Treatment. Reviewed

Munehisa Fukushima, Tadashi Kitahara, Ryohei Oya, Shiro Akahani, Hidenori Inohara, Shinji Naganawa, Noriaki Takeda

Laryngoscope Investigative Otolaryngology. Vol. - ( - ) 2017.10

A comparative analysis of dual-phase dual-energy CT and FDG-PET/CT for the prediction of histopathological invasiveness of non-small cell lung cancer. Reviewed International journal

Rintaro Ito, Shingo Iwano, Hironori Shimamoto, Hiroyasu Umakoshi, Koji Kawaguchi, Shinji Ito, Katsuhiko Kato, Shinji Naganawa

European journal of radiology Vol. 95 page： 186 - 191 2017.10

Language：English Publishing type：Research paper (scientific journal)

PURPOSE: To compare dual-phase dual-energy CT (DE-CT) with FDG-PET/CT for predicting histopathological locoregional invasiveness of non-small cell lung cancers (NSCLCs). MATERIALS AND METHODS: We selected 63 consecutive patients with NSCLC lesions (37 males, 26 females; age range, 44-85 years; mean age, 69 years) who were evaluated preoperatively by both DE-CT and PET/CT at our institution. Postoperative microscopic invasiveness (lymphatic permeation, vascular invasion, and/or pleural involvement) was reviewed, and we defined locoregionally invasive tumors as those that had at least one positive finding of microscopic invasiveness. DE-CT scanning in the arterial and delayed phases was performed after injection of iodinated contrast media using 140-kVp and 80-kVp tube voltages. Three-dimensional iodine-related attenuation of primary tumors in the arterial and delayed phases was quantified automatically using "syngo Dual Energy Lung Nodules" application software, and the ratio of arterial phase to delayed phase enhancement (A/D ratio) was calculated. The A/D ratio and SUVmax on PET/CT were evaluated with respect to postoperative invasiveness by univariate logistic regression analysis. RESULTS: The A/D ratio was significantly correlated with lymphatic permeation, vascular invasion, and pleural involvement (p=0.011, p=0.021, and p=0.010, respectively). In contrast, the SUVmax was significantly correlated with pleural involvement (p=0.020) but not with lymphatic permeation or vascular invasion (p=0.088 and p=0.100, respectively). In the subgroup of patients with lesion diameters ≤2cm, the A/D ratio was significantly correlated with locoregional invasiveness (p=0.040), while the SUVmax was not (p=0.121). CONCLUSION: For the prediction of microscopic invasiveness of NSCLCs, the diagnostic performance of dual-phase DE-CT may be comparable to that of FDG-PET/CT.

DOI： 10.1016/j.ejrad.2017.08.010

Web of Science

PubMed

ちょっと気になる胆・膵画像ティーチングファイルから(第36回) 主膵管内腫瘍栓を呈した腺房細胞癌の1例

小川浩, 竹原康雄, 館靖, 長縄慎二, 鈴木耕次郎, 廣岡芳樹, 山田豪, 藤井努, 下山芳江

胆と膵 Vol. 38 ( 10 ) page： 1131 - 1134 2017.10

Appearance of the Organum Vasculosum of the Lamina Terminalis on Contrast-enhanced MR Imaging.

Naganawa S, Taoka T, Kawai H, Yamazaki M, Suzuki K

Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine 2017.9

Clinical usefulness of MLCs in robotic radiosurgery systems for prostate SBRT. Reviewed

Masashi Tomida, Takeshi Kamomae, Junji Suzuki, Yoichi Ohashi, Yoshiyuki Itoh, Hiroshi Oguchi, Takahito Okuda

J Appl Clin Med Phys. Vol. 18 ( 5 ) page： 124-133 2017.9

Quantitative evaluation of interstitial pneumonia using 3D-curved high-resolution CT imaging parallel to the chest wall: A pilot study. Reviewed

Hiroyasu Umakoshi, Shingo Iwano, Tsutomu Inoue, Yuanzhong Li, Shinji Naganawa

PLoS One. Vol. 12 ( 9 ) page： e0185532. 2017.9

Significance of Endolymphatic Hydrops in Ears With Unilateral Sensorineural Hearing Loss. International journal

Yuriko Okazaki, Tadao Yoshida, Satofumi Sugimoto, Masaaki Teranishi, Ken Kato, Shinji Naganawa, Michihiko Sone

Otology & neurotology : official publication of the American Otological Society, American Neurotology Society [and] European Academy of Otology and Neurotology Vol. 38 ( 8 ) page： 1076 - 1080 2017.9

Language：English Publishing type：Research paper (scientific journal)

OBJECTIVE: The purpose of this study was to investigate the existence of endolymphatic hydrops (EH) in affected and unaffected ears in patients with unilateral sensorineural hearing loss (SNHL) using contrast-enhanced magnetic resonance imaging (MRI), and to evaluate the significance of EH in various otological diseases. STUDY DESIGN: Retrospective study. SETTING: University hospital. METHODS: One hundred eighty-two ears from 91 patients with unilateral SNHL were studied. The endolymphatic space was evaluated using 3-Tesla MRI with gadodiamide hydrate. Imaging data about the degree of EH in the cochlea and vestibule were analyzed and compared between ears with various otological diseases. RESULTS: All affected ears with delayed endolymphatic hydrops had EH. In affected ears with definite Menière's disease, cochlear EH was observed in all ears and vestibular EH in 93% of ears, and these rates were significantly higher in the affected than in the unaffected ears. EH was also observed in the cochlea and vestibule in 66% and 41%, respectively, of the affected ears with idiopathic sudden SNHL; however, these percentages did not differ significantly from those in the unaffected ears (52% and 38%, respectively). CONCLUSION: MRI showed that a high percentage of ears affected by Menière's disease or delayed endolymphatic hydrops had EH. Further studies should evaluate the implications of EH in ears, especially in those with sudden SNHL, in terms of secondary or pre-existing EH.

DOI： 10.1097/MAO.0000000000001499

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PubMed

Letter to Editors: Detection of endolymphatic hydrops using traditional MR imaging sequences

Shinji Naganawa, Michihiko Sone

American Journal of Otolaryngology - Head and Neck Medicine and Surgery Vol. 38 ( 5 ) page： 637 - 638 2017.9

A comparative analysis of dual-phase dual-energy CT and FDG-PET/CT for the prediction of histopathological invasiveness of non-small cell lung cancer. Reviewed

Rintaro Ito, Shingo Iwano, Hironori Shimamoto, Hiroyasu Umakoshi, Koji Kawaguchi, Shinji Ito, Katsuhiko Kato, Shinji Naganawa

European Journal of Radiology. ( 95 ) page： 186-191 2017.8

Optimized treatment strategy of radiotherapy for early glottic squamous cell carcinomas: An initial analysis. Reviewed

Kana Kimura, Yoshiyuki Itoh, Tohru Okada, Seiji Kubota, Mariko Kawamura, Rie Nakahara, Yumi Oie, Yuka Kozai, Yuuki Takase, Hidenori Tsuzuki, Naoki Nishio, Mariko Hiramatsu, Yasushi Fujimoto, Takefumi Mizutani, Shinji Naganawa

Nagoya J Med Sci. Vol. 79 ( 3 ) page： 331-338 2017.8

FDG-PET/CT predicts survival and lung metastasis of hypopharyngeal cancer in a multi-institutional retrospective study. Reviewed

Hidenori Suzuki, Katsuhiko Kato, Masami Nishio, Tsuneo Tamaki, Yasushi Fujimoto, Mariko Hiramatsu, Nobuhiro Hanai, Takeshi Kodaira, Yoshiyuki Itoh, Shinji Naganawa, Michihiko Sone, Yasuhisa Hasegawa

Annals of nuclear medicine Vol. 31 ( 7 ) page： 514 - 520 2017.8

Language：English Publishing type：Research paper (scientific journal)

OBJECTIVES: We investigated a possible correlation between the maximum standardized uptake value (SUVmax), which is assessed by pretreatment 18F-fluorodeoxyglucose positron emission tomography with computed tomography, and the overall survival (OS) in patients with hypopharyngeal squamous cell carcinoma from two institutions on long-term follow-up, and examined whether SUVmax is correlated with several survival outcomes, including lung metastasis-free survival. METHODS: A total of 81 patients were enrolled. The survival rate was calculated by the Kaplan-Meier method. Both univariate and multivariate survival analyses were assessed by a Cox proportional hazards model. RESULTS: SUVmax ≥15.2 in institution A (p = 0.0306) or SUVmax ≥8 in institution B (p = 0.0132) was significantly predictor of a lower OS. We disaggregated the data by high SUVmax (SUVmax ≥15.2 from institution A and SUVmax ≥8 from institution B) and low SUVmax (SUVmax <15.2 from institution A and SUVmax <8 from institution B). Patients with a high SUVmax exhibited a significantly lower OS in both univariate (p = 0.001) and multivariate (p = 0.0046) analyses for adjusted for the clinical stage and treatment group. The patients with a high SUVmax exhibited significantly shorter disease-specific (p = 0.0068), distant metastasis-free (p = 0.0428), and lung metastasis-free (p = 0.0328) survivals. CONCLUSIONS: High SUVmax was significantly correlated with a lower OS, disease-specific survival, distant metastasis-free survival, and lung metastasis-free survival in a multi-institutional retrospective study.

DOI： 10.1007/s12149-017-1176-1

Web of Science

PubMed

Optimized treatment strategy of radiotherapy for early glottic squamous cell carcinomas: An initial analysis. Reviewed

Nagoya journal of medical science Vol. 79 ( 3 ) page： 331 - 338 2017.8

Language：English Publishing type：Research paper (scientific journal)

The purpose of this study was to evaluate the clinical outcomes of radiotherapy for patients with T1/T2 glottic carcinoma. Patients with T1/T2 glottic carcinoma histopathologically diagnosed with squamous cell carcinoma and treated at our hospital between 2007 and 2015 were analyzed retrospectively. Our strategy for T1/T2 glottic carcinoma was as follows: radiotherapy alone with 2.25 Gy per fraction to a total of 25-28 fractions for patients with non-bulky T1 glottic carcinoma; concurrent chemoradiotherapy with oral S-1 and radiotherapy with 2 Gy per fraction to a total of 30 fractions for patients with T1 bulky/T2 favorable glottic carcinoma; or chemoradiotherapy with high-dose cisplatin and radiotherapy with 2 Gy per fraction to a total of 35 fractions for T2 unfavorable glottic carcinoma. Forty-eight patients were eligible. The median follow-up period among surviving patients was 38 months (range, 11-107). The disease was T1a in 23%, T1b in 13%, and T2 in 65% of patients. The 3-year local control rate in all patients, T1a, T1b, and T2 was 96.7%, 100%, 100%, and 96.0%, respectively. Of the 46 patients, one with T2 glottic carcinoma developed recurrent disease at the primary site, and one with T2 glottic carcinoma had lymph node recurrences in the neck. Acute Grade 3 dermatitis occurred in 8 (17%) patients and late Grade 2 hypothyroidism occurred in 2 (4%) patients. This retrospective study shows that our optimized treatment strategy of radiotherapy depending on the stage of early glottic carcinoma is not only effective but also well-tolerated.

DOI： 10.18999/nagjms.79.3.331

Web of Science

PubMed

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Papers - NAGANAWA, Shinji