Faculty Profiles - NAGANAWA, Shinji

Papers - NAGANAWA, Shinji

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Three-dimensional (3D) visualization of endolymphatic hydrops after intratympanic injection of Gd-DTPA: optimization of a 3D-real inversion-recovery turbo spin-echo (TSE) sequence and application of a 32-channel head coil at 3T. Open Access

Shinji Naganawa, Shunichi Ishihara,Shingo Iwano,Michihiko Sone, Tsutomu Nakashima

JOURNAL OF MAGNETIC RESONANCE IMAGING Vol. 31 page： 210-241 2010.1

Relationship between endolymphatic hydrops and vestibular-evoked myogenic potential.

Katayama Naomi, Yamamoto Masako, Teranishi Masaaki, Naganawa Shinji, Nakata Seiichi, Sone Michihiko, Nakashima Tsutomu

Acta Otolaryngol Vol. 130 ( 8 ) page： 917-923 2010.1

Detection of presumed hemorrhage in the ampullar endolymph of the semicircular canal: a case report. Open Access

Naganawa, Shinji; Ishihara, Shunichi; Iwano, Shingo; Sone, Michihiko; Nakashima, Tsutomu

Magn Reson Med Sci Vol. 8 page： 187-191 2010

Authorship：Lead author Language：English Publishing type：Research paper (scientific journal)

We examined a 61-year-old woman with sudden left-side hearing loss accompanied by severe vertigo. High signal in the ampullar endolymph of the left semicircular canal on magnetic resonance (MR) fluid attenuated inversion recovery (3D-FLAIR) images suggested labyrinthine hemorrhage. The patient had been treated for chronic heart failure and prescribed 100 mg/day of acetylsalicylic acid (aspirin) for its antiplatelet effect. The 3D-FLAIR images demonstrated a small amount of focal hemorrhage in the labyrinthine fluid that may have been overlooked on T(1)-weighted images.

DOI： 10.2463/mrms.8.187

Open Access

MR imaging of the Cochlear Modiolus after Intratympanic Administration of Gd-DTPA Open Access

Hisashi Kawai, Shinji Naganawa, Shunichi Ishihara, Michihiko Sone, Tsutomu Nakashima

Magn Reson Med Sci Vol. 9 ( 1 ) page： 23-29 2010

Estimation of Gadolinium-induced T(1)-shortening with Measurement of Simple Signal Intensity Ratio between the Cochlea and Brain Parenchyma on 3D-FLAIR: Correlation with T(1) Measurement by TI Scout Sequence.

Shinji Naganawa, Shunichi Ishihara,Shingo Iwano,Hisashi Kawai, Michihiko Sone, Tsutomu Nakashima

Magn Reson Med Sci Vol. 9 ( 1 ) page： 17-22 2010

3 Tesla magnetic resonance imaging obtained 4 hours after intravenous gadolinium injection in patients with sudden deafness.

Tagaya, Mitsuhiko; Teranishi, Masaaki; Naganawa, Shinji; Iwata, Tomoyuki; Yoshida, Tadao; Otake, Hironao; Nakata, Seiichi; Sone, Michihiko; Nakashima, Tsutomu

Acta Otolaryngol Vol. 130 page： 665-669 2010

Signal Alteration of the Cochlear Perilymph on 3 Different Sequences after Intratympanic Gd-DTPA Administration at 3 Tesla:Comparison of 3D-FLAIR,3D-T1-weighted Imaging,and 3D-CISS.

Yamazaki Masahiro,Naganawa Shinji,Kawai Hisashi,Nihashi Takashi,Nakashima Tsutomu

Magn Reason Med Sci Vol. 9 ( 2 ) page： 65-71 2010

Correlation between estimated glomerular filtration rate (eGFR) and apparent diffusion coefficient (ADC) values of the kidneys. Open Access

Toya Reiko,Naganawa Shinji,Kawai Hisashi,Ikeda Mitsuru

Magn Reson Med Sci Vol. 9 page： 59-64 2010

A comparative contrast perception phantom image of brain CT study between high-grade and low-grade liquid crystal displays (LCDs) in electronic medical charts.

Yoshimura Kumiko, Shimamoto Kazuhiro, Ikeda Mitsuru, Ichikawa Katsuhiro, Naganawa Shinji

Phys Med. Vol. in press 2010

Putaminal magnetic resonance imaging features at various magnetic field strengths in multiple system atrophy.

Watanabe H, Ito M, Fukatsu H, Senda J, Atsuta N, Kaga T, Kato S, Katsuno M, Tanaka F, Hirayama M, Naganawa S, Sobue G

Mov Disord Vol. in press 2010

Impact of adjustment measures on reducing outpatient waiting time in a community hospital: application of a computer simulation. Open Access

Chen, Bai-lian; Li, En-dong; Yamawuchi, Kazunobu; Kato, Ken; Naganawa, Shinji; Miao, Wei-jun

Chin Med J (Engl) Vol. 123 ( 5 ) page： 574-580 2010

Relationship between the Degree of Endolymphatic Hydrops and Electrocochleography.

Yamamoto M, Teranishi M, Naganawa S, Otake H, Sugiura M, Yamamoto Masako, Teranishi Masaaki, Naganawa Shinji, Otake Hironao, Sugiura Makoto, Iwata Tomoyuki, Yoshida Tadao, Katayama Naomi, Nakata Seiichi, Sone Michihiko, Nakashima Tsutomu

Audiol Neurootol Vol. 15 page： 254-260 2010

Virtual bronchoscopy-guided transbronchial biopsy for aiding the diagnosis of peripheral lung cancer.

Iwano Shingo, Imaizumi Kazuyozhi, Okada Tohru, Hasegawa Yoshinori, Naganawa Shinji

Eur J Radiol Vol. in press 2010

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

The aim of this study was to evaluate the clinical value of virtual bronchoscopy (VB) in aiding diagnosis of peripheral lung cancer by transbronchial biopsy (TBB). In addition, we sought to systematically analyze the factors that affect the diagnostic sensitivity of VB-guided TBB for the evaluation of peripheral lung cancers. MATERIALS AND METHODS: A hundred and twenty-two peripheral lung cancers from 122 patients (82 men and 40 women, 38-84 years; median 68.5 years) who were performed VB-guided TBB were evaluated retrospectively. VB was reconstructed from 1- or 0.5-mm slice thickness images of multi-detector CT (MDCT). Experienced pulmonologists inserted the conventional and ultrathin bronchoscopes into the target bronchus under direct vision following the VB image. RESULTS: A definitive diagnosis was established by VB-guided TBB in 96 lesions (79%). The diagnostic sensitivity of small pulmonary lesions </=30mm in maximal diameter (71%) was significantly lower than that of lesions >30mm (91%, p=0.008). For small pulmonary lesions </=30mm (n=76), internal opacity of the lesion was the independent predictor of diagnostic sensitivity by VB-guided TBB, and the non-solid type lung cancers were significantly lower than the solid type and part-solid type lung cancers for diagnostic sensitivity (odds ratio=0.161; 95% confidence interval=0.033-0.780; p=0.023). CONCLUSION: Use of an ultrathin bronchoscope and simulation with VB reconstructed by high quality MDCT images is thought to improve pathological diagnosis of peripheral lung cancers, especially for solid and partly solid types. For small pulmonary lesions </=30mm, the lesion internal opacity is a significant factor for predicting the diagnostic sensitivity, and the sensitivity was low for small non-solid type of lung cancers.

DOI： 10.1016/j.ejrad.2009.11.023

Correlation between pyramidal tract degeneration and widespread white matter involvement in amyotrophic lateral sclerosis: a study with tractography and diffusion-tensor imaging.

Senda, Joe; Ito, Mizuki; Watanabe, Hirohisa; Atsuta, Naoki; Kawai, Yoshinari; Katsuno, Masahisa; Tanaka, Fumiaki; Naganawa, Shinji; Fukatsu, Hiroshi; Sobue, Gen

Amyotroph Lateral Scler Vol. 10 page： 288-294 2009.12

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

Our aim was to evaluate the location and extent of white matter involvement in patients with amyotrophic lateral sclerosis (ALS) using diffusion-tensor magnetic resonance imaging (DTI). We obtained fractional anisotropy (FA) values from the internal capsule and various white matter regions of 46 patients with sporadic ALS and 19 control subjects. In ALS patients, FA values in the internal capsule, frontal white matter, genu and splenium of the corpus callosum (p<0.001), parietal and temporal lobe white matter, and posterior cingulum (p<0.05) were significantly lower than in controls. FA values in frontal white matter were lower than in parietal white matter (p<0.001). Decreased FA values in frontal, parietal, and temporal white matter, and the genu of the corpus callosum, correlated significantly with those in the internal capsule (r=0.66 and p<0.001, r=0.47 and p=0.001, r=0.33 and p=0.021, r=0.41 and p=0.005, respectively). No such correlations were found for FA values in other white matter areas or in controls. Patient FA values generally were not correlated with disease duration. DTI demonstrated more widespread involvement of the cerebral white matter in ALS patients than previously believed. The severity of involvement in the frontal, temporal and parietal white matter correlated with severity in the pyramidal tract.

DOI： 10.3109/17482960802651717

Endolymphatic space imaging in patients with delayed endolymphatic hydrops.

Kasai Sachio; Teranishi Masaaki; Katayama Naomi; Sugiura Makoto; Nakata Seiichi; Sone Michihiko; Naganawa Shinji; Nakashima Tsutomu

Acta Otolaryngol Vol. 129 page： 1163-1174 2009.11

鼓室内ガドリニウム造影剤注入による内耳内リンパ水腫の可視化

長縄慎二

映像情報 medical Vol. 41 ( 10 ) page： 967-1006 2009.9

Comparisons of I-123 diagnostic and I-131 post-treatment scans for detecting residual thyroid tissue and metastases of differentiated thyroid cancer.

IWANO SHINGO,KATO KATSUHIKO, NIHASHI TAKASHI,ITO SHIGEKI, TACHI YASUSHI, NAGANAWA SHINJI

Ann Nucl Med Vol. 2009 ( sep ) page： 25 2009.9

Lymphoplasmacytic sclerosing cholangitis: assessment of clinical, CT, and pathological findings.

Itoh Shigeki; Nagasaka T; Suzuki Koujiro; Satake Hiroko; Ota Toyohiro; Naganawa Shinji

Clin Radiol ( 64 ) page： 1104-1114 2009.9

Individual Differences in the Permeability of the Round Window: Evaluating the Movement of Intratympanic Gadolinium Into the Inner Ear.

Yoshioka M, Naganawa S, Sone M, Nakata S, Teranishi M, Nakashima T

Otol Neurotol Vol. 30 ( 5 ) page： 645-648 2009.8

MRIは画像診断の中心になっていくべき象徴的存在である

長縄慎二

月刊　新医療 Vol. 416 ( 8 ) page： 84-87 2009.8

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Papers - NAGANAWA, Shinji