研究者詳細 - 田岡　俊昭

論文 - 田岡　俊昭

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Enhancement pattern of normal extraocular muscles in dynamic contrast-enhanced MR imaging with fat suppression

Taoka T., Iwasaki S., Uchida H., Fukusumi A., Kichikawa K., Nakagawa H., Takayama K., Sakamoto M., Ohishi H.

Acta Radiologica 41 巻 ( 3 ) 頁： 211 - 216 2000年5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：Acta Radiologica

Purpose: To evaluate the internal structure of normal extraocular muscles on fat-suppressed dynamic contrast-enhanced MR imaging. Material and Methods: Ten subjects were examined using fat-suppressed dynamic contrast-enhanced MR imaging. We evaluated the enhancement pattern (C-shaped or ring-like) of extraocular muscles and quantified the maximum ratios of enhancement (Rmax) and maximum ratios of signal increase (Vmax). We also quantified Rmax and Vmax in the central and peripheral portions of medial rectus muscles. Results: In the early phase of dynamic contrast-enhanced MR imaging, a C-shaped or ring-like pattern was observed in 100% of inferior rectus, 95% of medial rectus, 55% of superior rectus, 20% of lateral rectus, and 15% of superior oblique muscles. Overall mean Rmax and Vmax values showed statistically significant differences to the temporal muscles. For the peripheral portion of medial rectus muscles, mean Rmax and Vmax values were greater than for the central portion. Conclusion: Using fat-suppressed dynamic contrast-enhanced MR imaging, the C-shape or ring-like internal structure of the extraocular muscles could be visualized, and were considered to reflect their structure of orbital and global layers. Potential usefulness of the fat-suppressed dynamic contrast-enhanced MR imaging for detecting pathological status is suggested.

DOI： 10.1080/028418500127345361

Scopus

Delayed ischemic hyperintensity of T1-weighted MRI 査読有り

Fujioka, M; Hiramatsu, KI; Sakaki, T; Taoka, T; Sakaguchi, S; Matsuo, Y

STROKE 31 巻 ( 3 ) 頁： 797 - 798 2000年3月

Hippocampal damage in the human brain after cardiac arrest.

Fujioka M, Nishio K, Miyamoto S, Hiramatsu KI, Sakaki T, Okuchi K, Taoka T, Fujioka S

Cerebrovascular diseases (Basel, Switzerland) 10 巻 ( 1 ) 頁： 2 - 7 2000年1月

Delayed ischemic hyperintensity on T1 weighted magnetic resonance images and induced manganese superoxide dismutase in mitochondria after mild focal ischemia: Long-lasting oxidative stress hypothesis 査読有り

Fujioka, M; Taoka, T; Matsuo, Y; Hiramatsu, KI; Kondo, Y; Ogoshi, K; Miyasaki, A; Sakaki, T; Kato, K; Colony, A; Siesjs, BK

STROKE 31 巻 ( 1 ) 頁： 341 - 341 2000年1月

Hippocampal damage in the human brain after cardiac arrest 査読有り

M Fujioka, K Nishio, S Miyamoto, K Hiramatsu, T Sakaki, K Okuchi, T Taoka, S Fujioka

CEREBROVASCULAR DISEASES 10 巻 ( 1 ) 頁： 2 - 7 2000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：KARGER

Background and Purpose: Very few reports are available on changes in the human hippocampus after cardiac arrest. The objective of this study was to investigate if specific hippocampal volume losses can be demonstrated in the human brain following reperfusion after cardiac arrest. Methods: We assessed the volumes of the hippocampal formation (HF) and temporal lobe excluding HF (TL) as the contrast using magnetic resonance (MR)-imaging-based volumetry in 11 vegetative patients after cardiac arrest and in 22 healthy controls of similar age, sex and body size distribution. The measured volumes were normalized for differences in the head size among subjects by dividing by the total intracranial volume (TICV). The MR images of the 11 patients were obtained between days 8 and 21 after cardiac arrest. Results: The observed volumes of HFs and TLs of both patient and control groups were as follows: right HF volume (HFV): 2.67 +/- 0.19 (mean +/- SD, cm(3)) in patients versus 3.89 +/- 0.44 in controls; left HFV: 2.72 +/- 0.17 versus 3.74 +/- 0.35; right TL volume (TLV): 73.37 +/- 6.54 versus 80.08 +/- 7.62, and left TLV: 72.45 +/- 6.77 versus 78.59 +/- 6.68. The normalized indic;es (HFV/TICV and TLV/TICV) were as follows: right HF: 0.0021 +/- 0.0002 (mean +/- SD) in patients versus 0.0031 +/- 0.0001 in controls, p < 0.0001, left HF: 0.0022 +/- 0.0002 versus 0.0030 +/- 0.0001, p < 0.0001, right TL: 0.058 +/- 0.002 versus 0.064 +/- 0.004, p = 0.0007, and left TL: 0.058 +/- 0.002 versus 0.062 +/- 0.004, p = 0.0014. The HFV-TLV ratios (HFV/TICV divided by TLV/TICV) of both groups were: right HFV-TLV ratio: 0.037 +/- 0.004 in patients versus 0.049 +/- 0.004 in controls, p < 0.0001, left HFV-TLV ratio: 0.038 +/- 0.004 versus 0.048 +/- 0.004, p < 0.0001. Conclusions: The patient group had HFs that were 26.8-30.6% smaller than those of the control group, but in the patient group, the TLs slightly decreased in size by only 7.8-8.2% of the volume of those in the control group within 21 days after cardiac arrest. The volume reductions in the bilateral HFs of patients after cardiac arrest were significantly larger than those in the bilateral TLs. We speculate that this specific rapid hippocampal shrinkage reflects its greater vulnerability to global brain ischemia. Copyright (C) 2000 S. Karger AG, Basel.

DOI： 10.1159/000016018

Web of Science

Comparison of local control and survival prediction with quantitative 3-D tumor volumetry vs. simple diameter measurement by magnetic resonance imaging in cervical cancer 査読有り

Mayr N. A, Taoka T, Yuh W. T, Ehrhardt J. C, Magnotta V. A, Denning L. M, Zhen W. K, Paulino A. C, Sorosky J. I, Wen B. C, Meeks S. L, Buatti J. M

International Journal of Radiation Oncology Biology Physics 48 巻 ( 3 Supplement ) 頁： 210 2000年

Imaging helps identify who benefits from stroke intervention.

Yuh WT, Taoka T, Ueda T, Chaloupka JC

Diagnostic imaging 21 巻 ( 12 ) 頁： 77-82 1999年12月

Current and future imaging of acute cerebral ischemia: assessment of tissue viability by perfusion imaging.

Ueda T, Yuh WT, Maley JE, Otake S, Quets JP, Taoka T, Hahn PY, White ML

Journal of computer assisted tomography 23 Suppl 1 巻頁： S3-7 1999年11月

The need for objective assessment of the new imaging techniques and understanding the expanding roles of stroke imaging.

Yuh WT, Ueda T, White M, Schuster ME, Taoka T

AJNR. American journal of neuroradiology 20 巻 ( 10 ) 頁： 1779-84 1999年11月

Clinical application of perfusion and diffusion MR imaging in acute ischemic stroke.

Ueda T, Yuh WT, Taoka T

Journal of magnetic resonance imaging : JMRI 10 巻 ( 3 ) 頁： 305-9 1999年9月

Secondary change in the substantia nigra induced by incomplete infarct and minor hemorrhage in the basal ganglia due to traumatic middle cerebral arterial dissection.

Fujioka M, Maeda Y, Okuchi K, Kagoshima T, Taoka T

Stroke; a journal of cerebral circulation 30 巻 ( 9 ) 頁： 1975-7 1999年9月

Novel brain ischemic change on MRI. Delayed ischemic hyperintensity on T1-weighted images and selective neuronal death in the caudoputamen of rats after brief focal ischemia.

Fujioka M, Taoka T, Matsuo Y, Hiramatsu KI, Sakaki T

Stroke; a journal of cerebral circulation 30 巻 ( 5 ) 頁： 1043-6 1999年5月

Age correlation of the time lag in signal change on EPI-fMRI.

Taoka T, Iwasaki S, Uchida H, Fukusumi A, Nakagawa H, Kichikawa K, Takayama K, Yoshioka T, Takewa M, Ohishi H

Journal of computer assisted tomography 22 巻 ( 4 ) 頁： 514-7 1998年7月

Normal myelination of anatomic nerve fiber bundles: MR analysis.

Nakagawa H, Iwasaki S, Kichikawa K, Fukusumi A, Taoka T, Ohishi H, Uchida H

AJNR. American journal of neuroradiology 19 巻 ( 6 ) 頁： 1129-36 1998年6月

Long-term palliative treatment of hepatocellular carcinoma extending into the portal vein and bile duct by chemoembolization and metallic stenting.

Yoshioka T, Uchida H, Kitano S, Makutani S, Maeda M, Taoka T, Ohishi H

Cardiovascular and interventional radiology 20 巻 ( 5 ) 頁： 390-3 1997年9月

Cine-magnetic resonance imaging evaluation of communication between middle cranial fossa arachnoid cysts and cisterns.

Eguchi T, Taoka T, Nikaido Y, Shiomi K, Fujimoto T, Otsuka H, Takeuchi H

Neurologia medico-chirurgica 36 巻 ( 6 ) 頁： 353-7 1996年6月

Fast fluid-attenuated inversion recovery (FAST-FLAIR) of ischemic lesions in the brain: comparison with T2-weighted turbo SE.

Taoka T, Iwasaki S, Nakagawa H, Fukusumi A, Kitano S, Yoshioka T, Ohishi H, Uchida H, Nakanishi S, Hirai A

Radiation medicine 14 巻 ( 3 ) 頁： 127-31 1996年5月

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