研究者詳細 - 田岡　俊昭

論文 - 田岡　俊昭

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動眼神経麻痺で発症した内頸動脈後交通動脈分岐部動脈瘤に対してコイル塞栓術が有効であった1例

和田敬, 高山勝年, 中川裕之, 宮坂俊輝, 明珍薫, 坂本雅彦, 田岡俊昭, 吉川公彦, 中川一郎, 黒川紳一郎

JNET: Journal of Neuroendovascular Therapy 3 巻 ( 4 ) 頁： 231 - 231 2009年11月

Fractional Anisotropy-Threshold Dependence in Tract-Based Diffusion Tensor Analysis: Evaluation of the Uncinate Fasciculus in Alzheimer Disease 査読有り Open Access

Taoka, T; Morikawa, M; Akashi, T; Miyasaka, T; Nakagawa, H; Kiuchi, K; Kishimoto, T; Kichikawa, K

AMERICAN JOURNAL OF NEURORADIOLOGY 30 巻 ( 9 ) 頁： 1700 - 1703 2009年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：American Journal of Neuroradiology

BACKGROUND AND PURPOSE: Tract-based analysis can be used to investigate required tracts extracted from other fiber tracts. However, the fractional anisotropy (FA) threshold influences tractography analysis. The current study evaluated the influence of the FA threshold in measuring diffusion tensor parameters for tract-based analysis of the uncinate fasciculus in subjects with Alzheimer disease (AD). MATERIALS AND METHODS: Subjects included 30 patients with AD and 10 healthy controls. We acquired tractographies of the uncinate fasciculus by using different FA thresholds. We measured mean FA and the apparent diffusion coefficient (ADC) along the uncinate fasciculus for different FA thresholds and evaluated the correlation between diffusion tensor parameters (FA, ADC) and the Mini-Mental State Examination (MMSE) scores. RESULTS: The uncinate fasciculus showed lower mean FA and higher mean ADC values in cases with more severe AD. A higher FA threshold led to a lower mean ADC value and a higher mean FA value along the uncinate fasciculus, whereas the relative order of measured values according to the severity of AD was not influenced by the FA threshold. An FA threshold of 0.2 showed higher correlation between mean ADC values and MMSE scores. FA thresholds of 0.15 and 0.20 showed higher correlation between mean FA values and MMSE scores. CONCLUSIONS: Appropriate selection of the FA threshold leads to higher correlation between diffusion tensor parameters and the severity of AD. For tract-based analysis of degenerative diseases such as AD, appropriate selection of the FA threshold for tractography is important.

DOI： 10.3174/ajnr.A1698

Abnormalities of the uncinate fasciculus and posterior cingulate fasciculus in mild cognitive impairment and early Alzheimer's disease: a diffusion tensor tractography study.

Kiuchi K, Morikawa M, Taoka T, Nagashima T, Yamauchi T, Makinodan M, Norimoto K, Hashimoto K, Kosaka J, Inoue Y, Inoue M, Kichikawa K, Kishimoto T

Brain research 1287 巻頁： 184 - 91 2009年9月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Brain Research

Mild cognitive impairment (MCI) is considered the transitional stage between normal cognition and dementia. The aim of this study was to use tractography based analysis to elucidate alterations in subjects with MCI compared with subjects with early Alzheimer's disease (AD) and controls. Seventeen subjects with early AD, 16 with MCI and 16 controls underwent magnetic resonance diffusion tensor imaging (DTI) and neuropsychological assessment. Diffusion tensor tractographies were computed and fiber-tract maps were generated using "dTV II" DTI software. We measured mean fractional anisotropy (FA) and apparent diffusion coefficient (ADC) values along the uncinate fasciculus (UNC), posterior cingulate fasciculus (PCF) and corticospinal tract (CST). There were statistically significant differences in the FA and ADC values of the UNC and PCF between subjects with early AD and controls. Subjects with MCI exhibited significantly lower FA values on both sides of the PCF relative to controls. However, there were no significant differences between subjects with early AD and MCI for any measurement. Our results suggest that alterations in the PCF precede the onset of dementia. © 2009 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.brainres.2009.06.052

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PubMed

Early Contrast-Enhanced Magnetic Resonance Imaging with Fluid-Attenuated Inversion Recovery in Multiple Sclerosis: Short Communications Open Access

Kataoka H., Taoka T., Ueno S.

Journal of Neuroimaging 19 巻 ( 3 ) 頁： 246 - 249 2009年7月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Journal of Neuroimaging

OBJECTIVE Contrast-enhanced magnetic resonance imaging (MRI) with fluid-attenuated inversion recovery (contrast FLAIR) is particularly useful for the detection of meningeal lesions. However, whether contrast FLAIR is useful in multiple sclerosis (MS) remains uncertain. This study evaluated the usefulness of contrast FLAIR in MS. PATIENTS AND METHODS We prospectively studied the clinical histories and brain MRI studies of 6 patients with clinically definite MS diagnosed according to the new McDonald criteria. Contrast FLAIR (repetition time [TR] 9,000 ms; echo time [TE] 120 ms; inversion time [TI] 2,200 ms; 5-mm slice thickness, with a 1-mm interslice gap) was obtained with the use of a bolus of gadolinium diethylenetriamine pentaacetic acid. RESULTS Three enhancing plaques located in the periventricular or juxtacortical areas showed higher intensity on contrast FLAIR than on other MR sequences. In contrast, 8 enhancing plaques in the deep white matter or infratentorial areas showed no increased signals on contrast FLAIR. CONCLUSION Our findings suggest that early contrast-enhanced imaging with FLAIR may be helpful for the further detection of MS plaques, particularly those located in periventricular and juxtacortical lesions. J Neuroimaging 2009;19:246-249. © 2008 by the American Society of Neuroimaging.

DOI： 10.1111/j.1552-6569.2008.00315.x

田岡俊昭

Equilibrium research 68 巻 ( 3 ) 頁： 113 - 118 2009年6月

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：Japan Society for Equilibrium Research

CT and MRI are indispensable for routine medical examination of neurovascular disorders. This article describes the imaging findings in acute infarction and carotid plaques, knowledge of which is essential for clinics of equilibrium disorders. Diffusion-weighted images are indispensable for detecting acute infarction, and perfusion MRI also yields important information about the ischemic status. Carotid bifurcation is one of the frequent sites of involvement in atheromatous diseases. A variety of imaging modalities are available for the evaluation of carotid plaques, including conventional contrast angiography, CT, ultrasound, and MRI. MRI is a non-invasive imaging method that reflects the chemical composition, concentration, water content or physical status of the tissues examined.

DOI： 10.3757/jser.68.113

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CiNii Research

その他リンク： http://search.jamas.or.jp/link/ui/2009271709

新生児けいれんで発症し、発作時脳波とMRI拡散強調画像で診断し得た脳梗塞の1例

柴田真理, 武山雅博, 藤田百合, 内田賀子, 釜本智之, 新居育世, 井崎和史, 西久保敏也, 斎藤こずえ, 小池菜月, 小林浩, 田岡俊昭, 高谷恒範, 今井竜子, 高橋幸博

日本産婦人科・新生児血液学会誌 = The Japanese journal of obstetrical, gynecological & neonatal hematology 19 巻 ( 1 ) 頁： "S - 63"-"S-64" 2009年5月

Reduced N-acetylaspartate in the basal ganglia of a patient with anti-NMDA receptor encephalitis 査読有り

Kataoka H., Dalmau J., Taoka T., Ueno S.

Movement Disorders 24 巻 ( 5 ) 頁： 784 - 786 2009年4月

Displacement of the Facial Nerve Course by Vestibular Schwannoma: Preoperative Visualization Using Diffusion Tensor Tractography 査読有り

Toshiaki Taoka, H. Hirabayashi, H. Nakagawa, M. Sakamoto, T. Akashi, T. Miyasaka, K. Kichikawa

Skull Base 19 巻 ( 01 ) 2009年4月

超低出生体重児の脳室内出血に対するウロキナーゼ脳室内投与査読有り

新居育世, 朴永鉢, 釜本智之, 西久保敏也, 田岡俊昭, 川口千晴, 高橋幸博

日本産婦人科・新生児血液学会誌 = The Japanese journal of obstetrical, gynecological & neonatal hematology 18 巻 ( 2 ) 頁： 51 - 58 2009年3月

"Sukeroku sign" and "dent internal-capsule sign"aEuro"identification guide for targeting the subthalamic nucleus for placement of deep brain stimulation electrodes 査読有り

Taoka, T; Hirabayashi, H; Nakagawa, H; Sakamoto, M; Kitano, S; Takahama, J; Marugami, N; Takayama, K; Akashi, T; Miyasaka, T; Iwasaki, S; Kurita, N; Sakaki, T; Kichikawa, K

NEURORADIOLOGY 51 巻 ( 1 ) 頁： 11 - 16 2009年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Neuroradiology

Introduction: The purpose of this study was to assess the usefulness of signs ("Sukeroku sign" and "dent internal-capsule sign") for the recognition of subthalamic nucleus (STN). Materials and methods: Five Parkinson's disease cases in which there was a successful placement of deep brain stimulation (DBS) electrodes at the STN were retrospectively reviewed. Five radiologists who were not engaged in localization of STNs in clinical practice were asked to locate the STNs before and after instructions on the signs. We evaluated the deviation between the reader-located points and the location of the DBS electrode for which there had been a successful installation. Results: After instruction, there was a significant reduction in the deviation between the reader-located points and the DBS electrode. The time required for localization was also reduced after the instructions. Conclusion: Sukeroku sign and dent internal-capsule sign are feasible indicators of STN and seem to be useful in helping to identify the STN. © 2008 Springer-Verlag.

DOI： 10.1007/s00234-008-0451-1

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PubMed

Cerebral Infarction Associated with Heparin-Induced Thrombocytopenia in a Patient with Encephalitis 査読有り Open Access

Saito, K; Hirano, M; Kajitani, M; Taoka, T; Kichikawa, K; Ueno, S

INTERNAL MEDICINE 48 巻 ( 1 ) 頁： 71 - 74 2009年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Internal Medicine

We report a patient who had cerebral infarction associated with heparin-induced thrombocytopenia (HIT) during treatment of aseptic encephalitis. In patients with intracranial inflammation, such as ours, the possibility of HIT has to be considered when heparin is used, since inflammatory cerebral lesions often cause vascular damage, which is an aggravating factor for HIT-associated thrombosis. © 2009 The Japanese Society of Internal Medicine.

DOI： 10.2169/internalmedicine.48.1486

Erratum:2. CT・MRI[Equilibrium Res Vol.68(3) 113-118]

田岡俊昭

Ｅｑｕｉｌｉｂｒｉｕｍ　Ｒｅｓｅａｒｃｈ 68 巻 ( 4 ) 頁： 183 - 183 2009年

Superior Clinical Impact of FDG-PET Compared to MRI for the Follow-up of a Patient with Sacral Lymphoma

Yamamoto Yasuhiro, Taoka Toshiaki, Nakamine Hirokazu

Journal of Clinical and Experimental Hematopathology 49 巻 ( 2 ) 頁： 109 - 115 2009年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：The Japanese Society for Lymphoreticular Tissue Research

The assessment of residual tumors after treatment of malignant lymphoma (ML) is often difficult. Here we report a case of non-Hodgkin's lymphoma with a huge sacral tumor. After chemotherapy and following radiation therapy, a residual mass was detected on magnetic resonance imaging (MRI). However, a hypermetabolic lesion in the sacrum disappeared on 18F-fluorodeoxyglucose positron emission tomography (18F-FDG-PET) and clinically the patient was considered to achieve complete remission. Seven months after the completion of radiation therapy, a new tumor-like lesion in the sacrum developed on MRI, but hypermetabolic lesions were not detected on 18F-FDG-PET. Recurrence of lymphoma was denied by open biopsy of the lesion. 18F-FDG-PET has been of widespread use not only for staging but for post-treatment assessment of ML. Although MRI is a standard imaging tool for the assessment of bone involvement of ML, there have been few reports documenting the results of comparative studies on the usefulness of 18F-FDG-PET and MRI for the evaluation of residual mass in bone involvement of ML. The present case suggests that 18F-FDG-PET is superior to MRI not only in the evaluation of a residual mass but in the judgment of recurrence after treatment of such patients. [J Clin Exp Hematopathol 49(2) : 109-115, 2009]

DOI： 10.3960/jslrt.49.109

CiNii Research

頭部の3.0MRI

田岡俊昭

映像情報 Medical 41 頁： 68 - 75 2009年

連合線維

田岡俊昭

画像診断 29(5) 頁： 485 - 498 2009年

画像検査で脳を探る

田岡俊昭

Equibulum Reserch 68 頁： 113 - 118 2009年

頭部の3.0T MRI 映像情報

田岡俊昭

Medical 41(14) 2009年

Prominent signal intensity of T<inf>1</inf>/T<inf>2</inf> prolongation in subcortical white matter of the anterior temporal region on conventional screening MRI of late preterm infants with normal development 国際誌

Wuttikul C., Taoka T., Akashi T., Nakagawa H., Miyasaka T., Sakamoto M., Takayama K., Wada T., Kitano S., Takahama J., Marugami N., Kichikawa K.

Magnetic Resonance Imaging 26 巻 ( 10 ) 頁： 1374 - 1380 2008年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Magnetic Resonance Imaging

Purpose: This study discusses prominent signal intensity of T1/T2 prolongation of subcortical white matter within the anterior temporal region in premature infant brains that radiologists may encounter when interpreting conventional screening MRIs. Materials and Methods: T1- and T2-weighted images of 69 preterm and term infants with no neurological abnormalities or developmental delays were evaluated retrospectively for areas of prominent signal intensity of T1/T2 prolongation in white matter. We measured signal intensities of anterior temporal white matter, deep temporal white matter, frontopolar white matter and subcortical white matter of the precentral gyrus. We accessed chronological changes in signal intensity in the anterior and deep temporal white matter. We also analyzed variance tests among the signal intensity ratios to the ipsilateral thalamus of white matter areas by gestational age. Results: There was high frequency of prominent signal intensity of T1/T2 prolongation in the temporal tip, particularly at a gestational age of 36-38 weeks. Signal intensity ratio of the anterior temporal white matter was lower on T1-weighted images and higher on T2-weighted images, and the finding became less prominent with increasing gestational age. The signal intensity ratios of anterior temporal white matter at a gestational age of 36-37 weeks and 38-39 weeks were significantly different from other regions. Conclusion: Prominent signal intensity of T1/T2 prolongation of subcortical white matter of the anterior temporal region is seen in normal premature infants, especially those at 36-39 gestational weeks. Although it is a prominent finding, radiologists should understand that these findings do not represent a pathological condition. © 2008 Elsevier Inc. All rights reserved.

DOI： 10.1016/j.mri.2008.04.014

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PubMed

Initial experience of using the filter protection device during carotid artery stenting in Japan (Radiation Medicine - Medical Imaging and Radiation Oncology (2008) 26, (348-354) DOI: 10.1007/s11604-008-0239-6) Open Access

Takayama K., Nakagawa H., Iwasaki S., Taoka T., Miyasaka T., Myouchin K., Wada T., Sakamoto M., Fukusumi A., Nakagawa I., Kurokawa S., Kichikawa K.

Radiation Medicine - Medical Imaging and Radiation Oncology 26 巻 ( 8 ) 頁： 516 - 517 2008年10月

Katsutoshi Takayama, Hiroyuki Nakagawa, Satoru Iwasaki, Toshiaki Taoka, Toshiteru Miyasaka, Kaoru Myouchin, Takeshi Wada, Masahiko Sakamoto, Akio Fukusumi, Ichiro Nakagawa, Shinichiro Kurokawa, Kimihiko Kichikawa

Radiation Medicine - Medical Imaging and Radiation Oncology 26 巻 ( 8 ) 頁： 516 - 517 2008年10月

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