A5072095355- Cerebrovascular and Carotid Artery Diseases
- Intracranial Aneurysms: Treatment and Complications
- Advanced Neuroimaging Techniques and Applications
- Neurosurgical Procedures and Complications
- Fetal and Pediatric Neurological Disorders
- Intracerebral and Subarachnoid Hemorrhage Research
- Meningioma and schwannoma management
- Transcranial Magnetic Stimulation Studies
- Spinal Dysraphism and Malformations
- Traumatic Brain Injury and Neurovascular Disturbances
- Glioma Diagnosis and Treatment
- Vascular Malformations Diagnosis and Treatment
- Spinal Fractures and Fixation Techniques
- MRI in cancer diagnosis
- Child Abuse and Trauma
- Advanced MRI Techniques and Applications
- Cerebrospinal fluid and hydrocephalus
- Neuroscience of respiration and sleep
- Teratomas and Epidermoid Cysts
- Peripheral Nerve Disorders
- Acute Ischemic Stroke Management
- Child Abuse and Related Trauma
- Head and Neck Surgical Oncology
- Ion Transport and Channel Regulation
- Vestibular and auditory disorders
Yamagata Prefectural Central Hospital
2018-2021
Niigata University
2012-2020
Tachikawa Medical Center
2020
University of California, Davis
2017
Toyama Prefectural Central Hospital
2012
Niigata City General Hospital
2009-2011
Niigata Prefectural Shibata Hospital
2010
Despite advances in molecular imaging, preoperative diagnosis of astrocytomas and oligodendrogliomas can be challenging. In the present study, we assessed whether 7T SWI used to distinguish malignant grading gliomas is possible.7T was performed on 21 patients with before surgery optimization for sharp visualization corticomedullary junction. Scoring cortical thickening displacement medullary vessels, characteristic oligodendroglial tumors, tapering, astrocytic performed. Additionally,...
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Peripheral intracranial aneurysm causing subdural hematoma without subarachnoid hemorrhageA 75-year-old man with no history of head trauma presented a 10-day episode left forehead heaviness followed by sudden headache and vomiting.Neurologic examinations were unremarkable.Neuroimaging showed frontal extra-axial lesion suggestive acute subacute (figure 1, A-D).CSF analysis revealed normal cytology the absence xanthochromia.An angiogram demonstrated peripheral middle cerebral artery E andF).No...
Aquaporin (AQP) water channels play a significant role in mesenchymal microvascular proliferation and infiltrative growth. AQPs are highly expressed malignant astrocytomas, positive correlation is observed between their expression levels histological tumor grade.To examine the utility of aquaporin positron emission tomography (PET) for differentiating astrocytoma grade III IV using AQP radioligand [11C]TGN-020.Fifteen patients, (n = 7) 8), 10 healthy volunteers underwent [11C]TGN-020 PET...
<b><i>Background:</i></b> In patients with cerebral infarction, identifying the distribution of infarction and relevant artery is essential for ascertaining underlying vascular pathophysiological mechanisms preventing subsequent stroke. However, visualization basal perforating arteries (BPAs) has had limited success, simultaneous viewing background anatomical structures only rarely been attempted in living human brains. Our study aimed at BPAs 7T MRI evaluating their...
Acute deprivation of unilateral sensory input rapidly enhances contralateral hand motor function, but the underlying mechanisms remain poorly understood. We herein used functional MRI to evaluate, in 14 healthy individuals, cortical activation for right finger motion before, during, and after left forearm induced by reversible, noninvasive ischemic nerve block (INB). Before INB, task activated primary sensorimotor cortex (SM1) as expected. During volume SM1 significantly increased, and, it...
We describe a case of acute middle cerebral artery occlusion in patient with ipsilateral internal carotid dysgenesis successfully treated mechanical thrombectomy utilising collateral pathway. During the procedure, triaxial system using balloon guiding catheter, flexible large lumen aspiration catheter and stent retriever was advanced from left vertebral to occluded through posterior communicating artery. Because proximal alone might have insufficient suction force due retrograde blood flow...
We have developed a new superficial temporal artery (STA)-superior cerebellar (SCA) bypass procedure via the trans-sylvian approach that can provide wider surgical space than in routine STA-SCA subtemporal approach, which could be associated with technical difficulties when performing deep and narrow microvascular anastomoses. Our method utilizes combined pterional/anterior tentorial edge resection. Anastomosis is performed at anterior pontomesencephalic segment of SCA just lateral to...
Dural arteriovenous fistula (dAVF) is an abnormal vascular communication between the meningeal artery and vein at dura mater, with frequent recruitment of collateral arterial pedicles. In recent years, Onyx embolization has become mainstay intervention for dAVF various locations, although unfavorable anatomy often limits effective obliteration lesion. Balloon assistance may facilitate curable occlusion shunt while preserving patency affected sinus, even in complicated dAVFs.We...
We describe a technique of trans-sylvian STA-SCA anastomosis for the vertebrobasilar insufficiency. The procedure utilizes combined pterional/anterior temporal approach and tentorial edge resection, is performed at anterior pontmesencephalic segment SCA just lateral to oculomotor nerve. This can provide wider shallower microsurgical space than standard via subtemporal approach; however, validation this mandatory it become an alternative routine anastomosis.
Exertional vertebrobasilar insufficiency (VBI) secondary to the non-atherosclerotic cause is uncommon. We herein report case of a patient who developed exertional VBI long after extracranial right vertebral artery (VA) dissection. At time dissection, VA was completely occluded near its origin, but distal flow compensated by collateral from deep cervical (DCA). After conservative management, discharged without neurologic deficit. Six years later, he recurrent in association with exertion his...