研究者詳細 - 田岡　俊昭

論文 - 田岡　俊昭

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Palmaz stent deployment for subclavian and brachiocephalic arterial occlusive disease: Factors predictive of restenosis

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

Interventional Neuroradiology 7 巻 ( SUPPL. 1 ) 頁： 49 - 52 2001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：Interventional Neuroradiology

Palmaz stent deployment is a useful method for subclavian and brachiocephalic arterial occlusive disease. We evaluated restenosis or intimal thickening after Palmaz stent deployment for nine lesions of subclavian or brachiocephalic arterial occlusive disease focusing on stent diameter, atheroma thickness near the stent, and degree of coverage for the lesion. Follow up DSA and IVUS at 5-14 months (mean 9) after therapy showed no significant changes in the size or shape of the stent itself. There were two lesions of thin in-stent intimal hyperplasia and five lesions of thick hyperplasia. There was no close relationship between intimal hyperplasia and stent diameter or atheroma size (relative thickness). There was some relationship between the degree of coverage of the lesion by the stent and degree of intimal hyperplasia, but to determine statistical significance, accumulation of a greater number of cases is necessary.

Scopus

MR imaging of pituitary morphology in idiopathic intracranial hypertension.

Yuh WT, Zhu M, Taoka T, Quets JP, Maley JE, Muhonen MG, Schuster ME, Kardon RH

Journal of magnetic resonance imaging : JMRI 12 巻 ( 6 ) 頁： 808-13 2000年12月

MR imaging of pituitary morphology in idiopathic intracranial hypertension 査読有り

WTC Yuh, MW Zhu, T Taoka, JP Quets, JE Maley, MG Muhonen, ME Schuster, RH Kardon

JOURNAL OF MAGNETIC RESONANCE IMAGING 12 巻 ( 6 ) 頁： 808 - 813 2000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：JOHN WILEY & SONS INC

The aim of this study was to investigate the morphologic changes of the pituitary gland in patients with the clinical diagnosis of idiopathic intracranial hypertension (IIH). Qualitative and quantitative analyses of pituitary morphology were performed in normal subjects (n = 23), patients with the clinical diagnosis of IIH (n = 40), and patients with acute increased intracranial pressure (AICP; n = 37) caused by acute head trauma. The loss of pituitary height (concavity) on the sagittal T1-weighted image was classified into five categories: I = normal, II = superior concavity that was mild (< (1)/(3) the height of the sella), III = moderate (between (1)/(3) and (2)/(3) concavity of height of sells), IV = severe (> (2)/(3) concavity of height of sells), and V = empty sells. The area ratio of pituitary gland to sella turcica measured in the midsagittal plane was quantified. Clinical records were retrospectively reviewed to correlate with magnetic resonance (MR) findings. Using moderate concavity (> (1)/(3)) as the minimum criterion for abnormality, IIH patients had an 85% incidence of morphologic changes with 80% sensitivity and 92% specificity. Empty sells (almost complete concavity of the sella) was found in only 2.5% of patients with IIH. Quantitative analysis of the pituitary gland/sella turcica area ratio showed a significant decrease in patients with IIH (P < 0.0001) but no significant difference between the normal subjects and AICP patients. A posterior deviation of the pituitary stalk was seen in 43% of patients. No enlargement of the ventricles or sulcal effacement was seen in IIH patients. Routine brain MR examination of patients with IIH frequently shows morphologic changes of the pituitary gland ranging from various degrees of concavity to (rarely) the extreme case of an empty sella. The etiology is unknown and may be related to the severity and duration of elevated CSF pressure. Such findings may be useful to facilitate the diagnosis of IIH, particularly in patients with equivocal clinical findings or when IIH is not suspected. (C) 2000 Wiley-Liss, Inc.

DOI： 10.1002/1522-2586(200012)12:6<808::AID-JMRI3>3.0.CO;2-N

DOI： 10.1002/1522-2586(200012)12:6<808::aid-jmri3>3.0.co;2-n

Web of Science

Magnetic resonance imaging in the assessment of radiation response in cervical cancer: regarding Hatano K et al. IJROBP 1999; 45:399-344.

Mayr NA, Taoka T, Yuh WT, Zhen WK, Paulino AC, Sorosky JI, Buatti JM

International journal of radiation oncology, biology, physics 48 巻 ( 3 ) 頁： 910-2 2000年10月

Magnetic resonance imaging in the assessment of radiation response in cervical cancer: Regarding Hatano K et al. IJROBP 1999;45 : 339-344. 査読有り

NA Mayr, T Taoka, WTC Yuh, WNK Zhen, AC Paulino, JI Sorosky, JM Buatti

INTERNATIONAL JOURNAL OF RADIATION ONCOLOGY BIOLOGY PHYSICS 48 巻 ( 3 ) 頁： 910 - 911 2000年10月

Functional magnetic resonance imaging using iron oxide particles in characterizing head and neck adenopathy. Open Access

Hoffman HT, Quets J, Toshiaki T, Funk GF, McCulloch TM, Graham SM, Robinson RA, Schuster ME, Yuh WT

The Laryngoscope 110 巻 ( 9 ) 頁： 1425-30 2000年9月

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 (Stockholm, Sweden : 1987) 41 巻 ( 3 ) 頁： 211 - 6 2000年5月

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

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

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：MUNKSGAARD INT PUBL LTD

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 (R-max) and maximum ratios of signal increase (V-max). We also quantified R-max and V-max 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 R-max and V-max values showed statistically significant differences to the temporal muscles. For the peripheral portion of medial rectus muscles, mean R-max and V-max 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

Web of Science

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

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