Yoshiaki Katada

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PURPOSE The purpose of this study was to evaluate the feasibility and potential usefulness of unenhanced magnetic resonance (MR) hepatic portal perfusion using arterial spin labeling (ASL) among healthy volunteers and hepatocellular carcinoma patients. MATERIALS AND METHODS The five healthy volunteers underwent unenhanced MR perfusion with inversion time(More)
INTRODUCTION Alexander disease is a rare disorder resulting from a glial fibrillary acidic protein gene mutation which causes progressive degeneration of white matter. With the usual poor prognosis, there are few case reports with long-term follow-up. We report the five-year clinical course of Alexander disease in one case using serial magnetic resonance(More)
This study was undertaken to examine the relationship between electrographic ST-elevation and regional myocardial blood flow during graded coronary constriction. Electrograms from the epicardial surface, outer and inner layers of the myocardium were recorded. Regional blood flow to the outer and inner layers of the myocardium was measured by means of a(More)
Effect of coronary ligation on epicardial and intramyocardial ST-segment voltage was investigated in 121 dogs. After ligation of the anterior descending coronary artery, marked ST-elevation, more than 2 mV, was detected in 102 dogs (Group-I) in epicardial lead of the area which was nourished by the ligated coronary artery. In 7 dogs (Group-II), coronary(More)
The functional capacity of coronary collaterals was investigated under resting and stress conditions in 15 dogs with chronic occlusion of the anterior descending coronary artery. ST-elevation in epicardial and intramyocardial electrograms was used for assessing the degree of regional myocardial ischemia. In resting condition, epicardial and intramyocardial(More)
Pulmonary artery sarcoma (PAS) is a rare and lethal neoplasm that is usually diagnosed during surgery or autopsy. Early diagnosis and radical surgical resection offer the only chance for survival. However, making a preoperative histopathological diagnosis is quite difficult. We encountered a 57-year-old woman presenting a PAS that mimicked a pulmonary(More)
PURPOSE To investigate the feasibility of perfusion imaging using an arterial spin labeling (ASL) technique for breast cancer. MATERIALS AND METHODS Thirteen female patients with primary breast cancers were included in this study. All examinations were performed on 1.5 Tesla MRI systems. Visual evaluations of the colored perfusion map and MRI perfusion(More)
BACKGROUND Total arch replacement and ascending aorta and arch replacement are the gold standard treatments for aortic arch aneurysm and are possible treatment strategies for chronic type A dissection, with good reported outcomes. However, because total arch replacement is extremely invasive, it can be difficult to perform in some patients. We designed an(More)
We report the case of a 40-year-old woman with posttraumatic arteriovenous fistula of the right radialis indicis artery. The patient was admitted because a pulsatile lesion appeared on her hand after blunt trauma. Liquid sclerotherapy using 3% polidocanol in combination with distal protection using the rubber band technique was undertaken, which resulted in(More)
Total arch replacement and ascending aorta and arch replacement are the gold standard treatments for aortic arch aneurysm and are possible treatment strategies for chronic type A dissection, with good outcomes. However, because total arch replacement is alternative invasive, it can be difficult to perform in some patients. The thoracic endovascular aneurysm(More)