論文 - 與儀　彰

Primary diffuse leptomeningeal atypical teratoid rhabdoid tumor (AT/RT) demonstrating atypical imaging findings in an adolescent patient

Amiko Kayo, Akira Yogi, Satoru Hamada, Koichi Nakanishi, Shota Kinjo, Kenichi Sugawara, Shogo Ishiuchi, Akihiro Nishie

Radiology Case Reports     2021年12月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Bright middle cerebellar peduncle sign in multiple system atrophy with predominant cerebellar ataxia is more apparent in doubleinversion recovery imaging than in conventional imaging

Wataru Shiraishi ,Ayano Matsuyoshi,Yusuke Nakazawa,Yukiko Inamori,Akira Yogi,Tetsuya Hashimoto

PLOS ONE     2021年11月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Different Indocyanine Green Fluorescence Patterns of Two Skin Metastases of Hypopharyngeal Squamous Carcinoma: A Case Report

「Takeaki Kusada」「Akira Yogi」「Hitoshi Hirakawa」「Yuiko Yasutomi」「Hajime Aoyama」「Yuji Matsuo」「Yuka Oota」「Mayako Zaha」「Takuro Ariga」「Joichi Heianna」「Sadayuki Murayama」

Photodiagnosis and Photodynamic Therapy     2021年02月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Symptomatic jugular venous reflux with dilatation of the superior ophthalmic vein mimicking cavernous dural arteriovenous fistula.

Nakamata A, Yogi A, Harakuni T, Ishigami K, Murayama S

Radiology case reports ( Radiology Case Reports )  14 ( 9 ) 1167 - 1170   2019年09月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

　概要を見る

We report a case of symptomatic jugular venous reflux (JVR) with dilatation of left superior ophthalmic vein (SOV), mimicking cavernous dural arteriovenous fistula (AVF). Severe JVR was caused by an AVFfor hemodialysis access and the narrowing of the left brachiocephalic vein. In-flow signals were found from the left internal jugular vein to left SOV on magnetic resonance angiography, and T1-weighted image and T2-weighted images demonstrated flow voids in bilateral sigmoid sinuses and confluence of sinuses due to rapid retrograde venous flow. We would like to emphasize that the presence of in-flow signals/flow voids in the venous sinuses may be the key imaging clues to distinguish JVR with dilatation of the SOV from cDAVF.

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Topographical Distribution of Epileptogenic Tubers in Patients With Tuberous Sclerosis Complex.

Ellingson BM, Hirata Y, Yogi A, Karavaeva E, Leu K, Woodworth DC, Harris RJ, Enzmann DR, Wu JY, Mathern GW, Salamon N

Journal of child neurology ( Journal of Child Neurology )  31 ( 5 ) 636 - 45   2016年04月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Tuberous sclerosis complex is a multisystem genetic syndrome often affecting the central nervous system. The purpose of the current study was to identify topographical patterns in the distribution specific to epileptogenic (n = 37) and nonepileptogenic (n = 544) tubers throughout the brain for a cohort of 23 tuberous sclerosis complex patients with a history of seizures. Tubers localized to the inferior parietal lobes, middle frontal lobes, middle temporal lobes, or central sulcus regions were associated with a high frequency of epileptogenic tubers. Epileptogenic tubers occurred statistically more frequently within the inferior parietal lobe and within the central sulcus region in children younger than 1 or between 1 and 3 years old, respectively. Results imply seizure activity in tuberous sclerosis complex patients can be associated with the location of cortical tubers.

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Use of Diffusion Weighted Imaging in Differentiating Between Maligant and Benign Meningiomas. A Multicenter Analysis.

Surov A, Ginat DT, Sanverdi E, Lim CCT, Hakyemez B, Yogi A, Cabada T, Wienke A

World neurosurgery ( World Neurosurgery )  88   598 - 602   2016年04月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Pulmonary metastases from angiosarcoma: a spectrum of CT findings.

Yogi A, Miyara T, Ogawa K, Iraha S, Matori S, Haranaga S, Murayama S

Acta radiologica (Stockholm, Sweden : 1987) ( Acta Radiologica )  57 ( 1 ) 41 - 6   2016年01月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Background: Though a few reports have summarized the computed tomography (CT) findings of pulmonary metastases from angiosarcoma, the detailed CT findings of cysts are not well known, except for their characteristic thin walls. Purpose: To retrospectively summarize the CT findings of pulmonary metastases from angiosarcoma, focusing mainly on the CT findings of cysts. Material and Methods: Thirty-three patients with pulmonary metastases from angiosarcoma were selected retrospectively. Two radiologists reviewed and assessed patients' chest CT images on a consensus basis for nodules, cysts, the CT halo sign, pneumothorax, pleural effusion, and enlarged lymph nodes. Cysts were also evaluated by wall thickness and smoothness, air-fluid levels, and vessels or bronchi penetrating the cysts. The relationship between cysts and pneumothorax was assessed using the Chi-square test. Results: Nodules were found in 28 (85%) patients. Cysts were found in 19 (58%) patients 17 had thin and smooth walls, 10 had thin and irregular walls, and four had thick and irregular walls. In addition, 12 patients showed vessels or bronchi penetrating the cysts, and six showed air-fluid levels. The CT halo sign, pneumothorax, pleural effusion, and mediastinal lymphadenopathy were seen in 19 (58%), 16 (48%), 26 (78.8%), and five (15.2%) patients, respectively. Pneumothorax occurred significantly more frequently in patients with cysts (P=0.002). Conclusion: Cysts showed variability in their walls, and air-fluid levels and vessels or bronchi penetrating the cysts appeared to be characteristic findings, which may be useful for detection and accurate diagnosis in patients with pulmonary metastases from angiosarcoma.

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DTI of tuber and perituberal tissue can predict epileptogenicity in tuberous sclerosis complex.

Yogi A, Hirata Y, Karavaeva E, Harris RJ, Wu JY, Yudovin SL, Linetsky M, Mathern GW, Ellingson BM, Salamon N

Neurology   85 ( 23 ) 2011 - 5   2015年12月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Objective: To evaluate whether diffusion tensor imaging (DTI) can predict epileptogenic tubers by measuring apparent diffusion coefficient (ADC), fractional anisotropy, axial diffusivity, and radial diffusivity in both tubers and perituberal tissue in pediatric patients with tuberous sclerosis complex (TSC) undergoing epilepsy surgery. Methods: We retrospectively selected 23 consecutive patients (aged 0.4-19.6 years, mean age of 5.2; 13 female, 10 male) who underwent presurgical DTI and subsequent surgical resection between 2004 and 2013 from the University of California-Los Angeles TSC Clinic. We evaluated presurgical examinations including video-EEG, brain MRI, (18)F-fluorodeoxyglucose-PET, magnetic source imaging, and intraoperative electrocorticography for determining epileptogenic tubers. A total of 545 tubers, 33 epileptogenic and 512 nonepileptogenic, were identified. Two observers generated the regions of interest (ROIs) of tubers (ROI(tuber)), the 4-mm-thick ring-shaped ROIs surrounding the tubers (ROI(perituber)), and the combined ROIs (ROI(tuber+perituber)) in consensus and calculated maximum, minimum, mean, and median values of each DTI measure in each ROI for all tubers. Results: The Mann-Whitney U test demonstrated that the epileptogenic group showed higher maximum ADC and radial diffusivity values in all ROIs, and that maximum ADC in ROI(tuber+perituber) showed the strongest difference (p = 0.001). Receiver operating characteristic analysis demonstrated that maximum ADC measurements in ROI(tuber+perituber) (area under curve = 0.68 ± 0.05, p < 0.001) had 81% sensitivity and 44% specificity for correctly identifying epileptogenic tubers with a cutoff value of 1.32 μm(2)/ms. Conclusions: DTI analysis of tubers and perituberal tissue may help to identify epileptogenic tubers in presurgical patients with TSC more easily and effectively than current invasive methods.

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Usefulness of the apparent diffusion coefficient (ADC) for predicting the consistency of intracranial meningiomas

Akira Yogi, Tomomi Koga, Kimei Azama, Daichi Higa, Kazuhiko Ogawa, Takashi Watanabe, Shogo Ishiuchi, Sadayuki Murayama

Clinical Imaging ( Clinical Imaging )  38 ( 6 ) 802 - 807   2014年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Meningioma consistency is an important factor for surgical treatment. Tumor cellularity and fibrous tissue contribute to the consistency of tumors, and it is proposed that the minimum apparent diffusion coefficient (ADC) value is significantly correlated with meningioma consistency. Twenty-seven consecutive patients with 28 meningiomas were retrospectively enrolled. Minimum ADC values in meningiomas with a hard consistency were significantly lower than those with a soft consistency. The minimum ADC value might have clinical use as a predictor of meningioma consistency.

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Distribution patterns of metastatic pelvic lymph nodes assessed by CT/MRI in patients with uterine cervical cancer

Goro Kasuya, Takafumi Toita, Kazuhisa Furutani, Takeshi Kodaira, Tatsuya Ohno, Yuko Kaneyasu, Ryouichi Yoshimura, Takashi Uno, Akira Yogi, Satoshi Ishikura, Masahiro Hiraoka

Radiation Oncology ( Radiation Oncology )  8 ( 1 ) 139   2013年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Scintigraphy and computed tomography findings for the diagnosis of bronchiolitis obliterans following peripheral blood stem cell transplantation.

Yamashiro T, Iida G, Kamiya H, Yogi A, Murayama S, Haranaga S, Yara S

Hellenic journal of nuclear medicine   15 ( 1 ) 52 - 5   2012年01月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Scintigraphy and computed tomography findings for the diagnosis of bronchiolitis obliterans following peripheral blood stem cell transplantation.

Yamashiro T, Iida G, Kamiya H, Yogi A, Murayama S, Haranaga S, Yara S

Hellenic journal of nuclear medicine   15 ( 1 ) 52 - 5   2012年01月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Scintigraphy and computed tomography findings for the diagnosis of bronchiolitis obliterans following peripheral blood stem cell transplantation

Tsuneo Yamashiro, Gyo Iida, Hisashi Kamiya, Akira Yogi, Sadayuki Murayama, Shusaku Haranaga, Satomi Yara

Hellenic Journal of Nuclear Medicine     2012年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Scintigraphy and computed tomography findings for the diagnosis of bronchiolitis obliterans following peripheral blood stem cell transplantation

Tsuneo Yamashiro, Gyo Iida, Hisashi Kamiya, Akira Yogi, Sadayuki Murayama, Shusaku Haranaga, Satomi Yara

Hellenic Journal of Nuclear Medicine     2012年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Advanced CT images reveal nonmetric cranial variations in living humans

SAITOU Naruya, KIMURA Ryosuke, FUKASE Hitoshi, YOGI Akira, MURAYAMA Sadayuki, ISHIDA Hajime

Anthropological science : journal of the Anthropological Society of Nippon ( Anthropological Society of Nippon )  119 ( 3 ) 231 - 237   2011年12月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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Two mainland Japanese males were examined with a computer tomography (CT) X-ray scanner to reconstruct three-dimensional CT simulation images of their cranial anatomy and to check for the presence/absence of 23 nonmetric cranial traits. Surface anatomy for scoring 19 nonmetric cranial variations was clearly observed among the 23 variations. Evaluation of the four other traits might have been disturbed due to dental treatment history, small variations in the images, or X-ray radiation condition. However, these disturbances could be overcome by a combination of simple thin-sliced CT images and magnetic resonance imaging. We have thus developed a new anatomical field for elucidating human morphology.<br>

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Advanced CT images reveal nonmetric cranial variations in living humans

SAITOU Naruya, KIMURA Ryosuke, FUKASE Hitoshi, YOGI Akira, MURAYAMA Sadayuki, ISHIDA Hajime

Anthropological science : journal of the Anthropological Society of Nippon ( Anthropological Society of Nippon )  119 ( 3 ) 231 - 237   2011年12月 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

　概要を見る

Two mainland Japanese males were examined with a computer tomography (CT) X-ray scanner to reconstruct three-dimensional CT simulation images of their cranial anatomy and to check for the presence/absence of 23 nonmetric cranial traits. Surface anatomy for scoring 19 nonmetric cranial variations was clearly observed among the 23 variations. Evaluation of the four other traits might have been disturbed due to dental treatment history, small variations in the images, or X-ray radiation condition. However, these disturbances could be overcome by a combination of simple thin-sliced CT images and magnetic resonance imaging. We have thus developed a new anatomical field for elucidating human morphology.<br>

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口腔癌の頚部リンパ節に対する超選択的動注化学放射線療法の効果

仁村文和, 新垣敬一, 嵩元裕之, 藤井亜矢子, 與儀　彰, 宜保昌樹, 砂川元

頭頚部癌   37 ( 1 ) 24 - 28   2011年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

Advanced CT images reveal nonmetric cranial variations in living humans

SAITOU NARUYA, KIMURA RYOSUKE, FUKASE HITOSHI, YOGI AKIRA, MURAYAMA SADAYUKI, ISHIDA HAJIME

Ａｎｔｈｒｏｐｏｌｏｇｉｃａｌ Ｓｃｉｅｎｃｅ ( 日本人類学会 )  119 ( 3 ) 231 - 237   2011年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

　概要を見る

Two mainland Japanese males were examined with a computer tomography (CT) X-ray scanner to reconstruct three-dimensional CT simulation images of their cranial anatomy and to check for the presence/absence of 23 nonmetric cranial traits. Surface anatomy for scoring 19 nonmetric cranial variations was clearly observed among the 23 variations. Evaluation of the four other traits might have been disturbed due to dental treatment history, small variations in the images, or X-ray radiation condition. However, these disturbances could be overcome by a combination of simple thin-sliced CT images and magnetic resonance imaging. We have thus developed a new anatomical field for elucidating human morphology.<br>

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口腔癌の頸部リンパ節に対する超選択的動注化学放射線療法の効果

仁村 文和, 新垣 敬一, 嵩元 裕之, 藤井 亜矢子, 與儀 彰, 宜保 昌樹, 砂川 元

頭頸部癌 ( 日本頭頸部癌学会 )  37 ( 1 ) 24 - 28   2011年

掲載種別: 研究論文（学術雑誌）

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当科では超選択的動注化学放射線療法（以下動注療法と略す）を用いた術前治療を原発巣および転移リンパ節に対して動注療法を施行している。今回，転移リンパ節に対する動注療法の治療効果を検討した。動注は，Seldinger法を用いて施行した。動注療法はCBDCA量をカルバート式で算出し，転移リンパ節の栄養血管にカテーテルを挿入後，造影CTにて造影効果を確認したのち施行した。放射線療法は外照射で，患側の全頸部に対して42Gy（3Gy/day）を施行した。術前治療後，約4週間後に原発腫瘍切除術および頸部郭清術を施行した。対象症例は，頸部リンパ節転移と診断したStage IIIとStage IVの16症例，転移リンパ節23個を対象とした。原発巣に対する病理組織学的評価では，Grade IIb以上の組織学的効果を示した症例の割合は87.5%，Grade III以上が68.8%であった。また切除した頸部リンパ節に関しては，Grade IIb以上の組織学的効果は87.0%，Grade III以上が69.6%であった。これらの結果から当科で行っている動注療法は，頸部リンパ節に対しても効果が認められ，その有用性が示唆された。

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MDCTでの肺動脈塞栓症・深部静脈血栓症の同時評価における造影剤注入プロトコールの検討　高濃度造影剤と高用量造影剤の比較

宜保昌樹, 安座間泰晴, 運転　忍, 與儀　彰, 境　昌弘, 村山貞之

琉球医学会誌   29 ( 1 ) 27 - 31   2010年 [ 査読有り ]

掲載種別: 研究論文（学術雑誌）

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