A5032019715- Radiation Dose and Imaging
- Advanced X-ray and CT Imaging
- Intracranial Aneurysms: Treatment and Complications
- Medical Imaging Techniques and Applications
- Cerebrovascular and Carotid Artery Diseases
- Cardiac Imaging and Diagnostics
- Traumatic Brain Injury and Neurovascular Disturbances
- Advanced Radiotherapy Techniques
- Digital Radiography and Breast Imaging
- Acute Ischemic Stroke Management
- Thermal Regulation in Medicine
- Cerebrospinal fluid and hydrocephalus
- Radiology practices and education
- Moyamoya disease diagnosis and treatment
- Infective Endocarditis Diagnosis and Management
- Congenital Heart Disease Studies
- Vascular Malformations Diagnosis and Treatment
- Intracerebral and Subarachnoid Hemorrhage Research
- Cardiovascular Health and Disease Prevention
- Neurosurgical Procedures and Complications
- Tracheal and airway disorders
- Ultrasound in Clinical Applications
- Cardiac Arrhythmias and Treatments
- Radiation Therapy and Dosimetry
- Atomic and Subatomic Physics Research
Yamaguchi University
2010-2024
Hiroshima General Hospital
2024
Hiroshima University Hospital
2023
Hiroshima University
2023
Tsuchiura Kyodo General Hospital
2016-2022
Shikoku Medical Center for Children and Adults
2015-2022
National Hospital Organization
2022
Kawamura Hospital
2021-2022
Kawasaki University of Medical Welfare
2021
Yamaguchi University Hospital
2014
Objective Traditionally, angiographic vasospasm (aVS) has been thought to cause delayed cerebral ischemia (DCI) after aneurysmal subarachnoid hemorrhage (aSAH). However, successful treatment of aVS alone does not result in improved neurological outcome. Therefore, there may be other potential causes poor outcome, including spreading depolarization (SD). A recent study showed beneficial effects cilostazol on DCI and The present prospective clinical trial experimental focused SDs. Methods...
Focal brain cooling has been recognized to have a suppressive effect on epileptiform discharges or protective tissue. However, the precise influence of normal function and histology not yet thoroughly investigated. The aim this study was investigate neurophysiopathological consequences focal detect threshold temperature that causes irreversible histological change motor dysfunction.The experiments were performed in adult male Sprague-Dawley rats (weighing 250-350 g) after induction halothane...
Endoscopic surgery plays a significant role in the treatment of intracerebral hemorrhage. However, residual hematoma cannot be measured intraoperatively from endoscopic view, and it is difficult to determine precise location endoscope within cavity. The authors attempted develop real-time ultrasound-guided using bur-hole-type probe.From November 2012 March 2014, patients with hypertensive putaminal hemorrhage who underwent removal were enrolled this study. Real-time ultrasound guidance was...
To figure out the relationship between image noise and contrast ratio (CNR) at different tube voltages, using anthropomorphic new-born 1-year-old phantoms, to discuss feasibility of radiation dose reduction, based on obtained CNR index from noise. We performed helical scans phantoms. The CT numbers simulated aorta mediastinum were measured; then was calculated 80, 100, 120-kVp images reconstructed with filtered back projection (FBP) iterative reconstruction (IR). also measured center surface...
Abstract A six-year-old female with congenital bilateral choanal atresia was examined by CT (computed tomography) and contrast radiography. clearly demonstrated the existence of atresia, differentiated osseous stenosis from membranous in choanae. may be first choice radiological examination for pre-operative diagnosis atresia.
A 34-year-old man presented with occlusion of the left vertebral artery (VA) secondary to dissection subclavian manifesting as vertigo, nausea, vomiting, and neck pain. On admission, he was alert limb truncal ataxia. Magnetic resonance (MR) imaging MR angiography showed cerebellar infarction VA. Conventional three-dimensional computed tomography (3D-CT) stenosis thrombosed pseudo-lumen artery, Presumably idiopathic had reached orifice VA, an embolism from caused leading infarction. After one...
To compare the radiation dose and image noise of nonenhanced CT scans performed at 80, 100, 120 kVp with tube current modulation (TCM) we used anthropomorphic phantoms newborn, 1-year-old, 5-year-old children. The index was set 12. in center level chest abdomen measured within a circumscribed region interest. We doses individual tissues or organs radio-photoluminescence glass dosimeters for each phantom. Various were assigned calculated based on international commission radiological...
Abstract To evaluate and compare the absorbed dose image quality when applying a commercially produced fixation device (group A) vaccum mattress to pediatric patients B). We compared noise between groups at phantom clinical study. For study, measurement for real time skin dosimeter was 3.0 mGy group A 1.9 B (p < 0.05). computed tomography index product, dose-length effective radiation were significantly lower with A, (3.4 mGy, 27.0 mGy-cm, 2.2 mSv vs 4.4 36.7 mSv), p 0.05 all...
Superficial temporal artery (STA) to middle cerebral (MCA) anastomosis may have inadequate effects in patients with internal carotid (ICA) occlusion and severe stenosis of the ipsilateral external (ECA), because poor blood flow STA leads insufficient MCA. In these patients, dilation stenotic ECA is required improve before STA-MCA anastomosis. A 71-year-old man presented left hemiparesis dysarthria. Magnetic resonance imaging revealed an old watershed infarction right hemisphere. Right...
Thrombosed giant aneurysm of the V1 segment vertebral artery is rare, and there controversy regarding optimal method treatment in this portion. Here, we report a thrombosed with good clinical course endovascular proximal occlusion artery. A 59-year-old woman presented large mass left side neck. Echographic examination revealed measuring 42 × 38 48 mm Angiography showed Endovascular was performed, lessened gradually. Although number procedures have been developed to treat extracranial...
Purpose: A three-dimensional (3D) image from computed tomography (CT) angiography is a useful method for evaluation of complex anatomy such as congenital heart disease. However, 3D imaging requires high contrast enhancement distinguishing between blood vessels and soft tissue. To improve the enhancement, many are increasing injection rate. one use fenestrated catheters, it allows smaller gauge catheter high-flow protocols. The purpose this study was to compare pressure rate CT number...
Abstract Equivalent doses for the eye lenses, thyroid, and mammary glands were measured compared between one adult three pediatric anthropomorphic phantoms during chest computed tomography (CT) using 40 mm volume helical scan on Aquilion ONE GENESIS Edition CT equipment. Placing an optically stimulated luminescence dosemeter (OSLD) gland, we equivalent dose of OSLD among different a scan. Compared with adults, to lens, ~81%, 77%, 63% lower in newborns, 1-year-olds, 5-year-olds comparable...
Staged angioplasty (SAP) is used as an alternative to preventing cerebral hyperperfusion syndrome (CHS) after carotid artery stenting (CAS), particularly among patients with compromised haemodynamics. Although SAP presumed prevent CHS by gradually restoring blood flow (CBF), few studies have examined haemodynamic changes, and none evaluated CBF during the chronic phase of SAP. In present study, in addition clinical outcome SAP, we measured both resting cerebrovascular reactivity (CVR)...