Takahiro Ouchi

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Abnormal Hemispheric Blood Flow and Metabolism in Cerebrovascular Disease. I. Disordered Patterns of Hemispheric Metabolism • Hemispheric blood flow (HBF) and metabolism were studied in 46 patients with various types and stages of ischemic cerebrovascular disease and were found to be abnormal in all patients, including those with transient ischemic attacks.(More)
We have performed magnetotransport measurements on a multi-layer graphene flake. At the crossing magnetic field Bc, an approximately temperature-independent point in the measured longitudinal resistivity ρxx, which is ascribed to the direct insulator-quantum Hall (I-QH) transition, is observed. By analyzing the amplitudes of the magnetoresistivity(More)
A small forbidden gap matched to low-energy photons (meV) and a quasi-Dirac electron system are both definitive characteristics of bilayer graphene (GR) that has gained it considerable interest in realizing a broadly tunable sensor for application in the microwave region around gigahertz (GHz) and terahertz (THz) regimes. In this work, a systematic study is(More)
A 59-year old man was admitted to our stroke care unit 1.8 hours after onset of cardioembolic stroke. Administration of issue-plasminogen activator achieved complete recanalization, and his lesion on diffusion-weighted imaging (DWI) disappeared and single photon emission computed tomography showed luxury perfusion. DWI reversal and luxury perfusion were(More)
Abstract: Impaired Neurogenic Cerebrovascular Control and Dysautoregulation After Stroke • Cerebral autoregulation was tested in 32 patients with various anatomical locations and stages of ischemic cerebrovascular disease. Cerebral perfusion pressure (CPP) was raised or lowered in a standard manner by the use of head-up tilting (induced hypotension) and(More)
Cerebral Metabolic Changes During Treatment of Subacute Cerebral Infarction by Alpha and Beta A drenergic Blockade With Phenoxybenzamine and Propranolol • Cerebral hemispheric blood flow (HBF) and metabolism were measured in 30 patients with acute and subacute cerebral infarction before and after intracarotid infusion of the alpha adrenergic blocking agent(More)