Tsutomu Yoshioka

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BACKGROUND AND PURPOSE Cerebral veins show wide variation, and unexpected veins occasionally limit surgical procedures for clipping of cerebral aneurysms. This study was undertaken to assess the utility of three-dimensional CT angiography (3D-CTA) in the evaluation of venous anatomy before surgical clipping of cerebral aneurysms. METHODS 3D-CTA was(More)
Symptomatic basilar artery stenosis invariably has poor prognosis owing to limited treatment options. Modernized stent system delivery technology has paved the way for treating tortuous vascular segments of intracranial system. The authors hereby report on the use of intracranial stent to treat basilar artery stenosis. A-61-year old man presented with one(More)
We report a case of spontaneous vertebral arteriovenous fistula manifesting pulsating tinnitus with left cervical bruit. A 50-year-old woman presented with pulsatile tinnitus of unknown duration. Angiography revealed a simple and direct fistula between the second segment of the left vertebral artery and the epidural venous system. The fistula was well(More)
BACKGROUND Progressing stroke is said to occur when symptoms and signs worsen in cases of ischemic stroke. Although conservative methods using volume expansion with antithrombotic or anticoagulative agents are widely used for progressing stroke, in some hospitals, emergency carotid endarterectomy (CEA) has been performed for carotid stenosis, with mixed(More)
This report presents a case of a transorbital penetrating brain injury caused by a metal rod. A 47-year-old male injured his left lower eyelid with no witness during working hours. The two days later, he presented with a right hand tremor and abnormal behavior, and was admitted to the hospital. A CT showed a bone fracture of the left orbital roof and a(More)
We report a ruptured vertebral artery dissection (VAD) involving the origin of the posterior inferior cerebellar artery(PICA)treated by a staged strategy with stent-assisted coil embolization. A 52-year-old woman was admitted with a ruptured right VAD involving the origin of the developed PICA. Endovascular internal trapping of the enlarged distal VAD was(More)
Acute subdural hematoma (ASDH) and subacute subdural hematoma(SASDH)evacuations are commonly performed through a large craniotomy or with external decompression surgery to avoid secondary brain injury. In the field of head trauma, minimally invasive surgeries performed with neuroendoscopy were recently reported. We report 12 patients with ASDH( n=9) and(More)
A hard-x-ray telescope is successfully produced for balloon observations by making use of depth-graded multilayers, or so-called supermirrors, with platinum-carbon (Pt/C) layer pairs. It consists of four quadrant units assembled in an optical configuration with a diameter of 40 cm and a focal length of 8 m. Each quadrant is made of 510 pieces of coaxially(More)