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Biomedical subjects

K Hanaguri

Publications and source records attributed to K Hanaguri.

8 recordsLinked to original sources
PubMed1996

Assessment of cerebral fat embolism by magnetic resonance imaging in the acute stage.

The authors assessed the characteristic appearance of magnetic resonance imaging (MRI) of cerebral fat embolism in three patients. The MRI features in the acute stage were characterized by widespread, spotty lesions in the white matter, which appeared hyperintense on T2-weighted images and iso- or hypointense on T1-weighted images. The relation between clinical features and MRI findings are discussed.

Acute Disease↗
PubMed1993

Hemodynamic study on flow patterns in the carotid bifurcation before and after carotid endarterectomy using cine magnetic resonance imaging.

Blood flow in the cervical carotid bifurcation was investigated by cine magnetic resonance imaging. In patients without stenosis, a low-intensity stream was demonstrated from the beginning of the carotid bulb, which was more distinct in the systolic phase. In patients with stenotic carotid bifurcations, the low-intensity flow was also present but was more prominent than in the non-stenotic bifurcation. This low-intensity stream may be due to the change from steady to turbulent flow due to the geometric characteristics of the carotid bifurcation or atheromatous plaque, similar to the flow separation phenomenon in fluid dynamics because of the coincidence of location and flow pattern. After carotid endarterectomy, turbulent flow was seen at the proximal and distal ends of the endarterectomy. Close follow-up and administration of antiplatelet agents are necessary to prevent restenosis due to mural thrombosis induced by such turbulent flow.

Carotid Arteries↗
PubMedDate not supplied

Metastatic liver tumor with tumor thrombi of the portal vein.

Tumor thrombi of the portal vein are an important prognostic indicator for primary hepatocellular carcinoma (hepatoma), and their presence is a major criterion in differentiating intrahepatic tumors. We report four cases of metastatic liver tumors with tumor thrombi, one a gastric tumor and the others colorectal cancers, two of which were difficult to differentiate from hepatoma. The angiographic features of hepatoma are reviewed and differentiation between the two is discussed. Angiography showed the vessels of metastatic liver tumors to be of fine to mixed types. Chaotic vessels and pooling are characteristic of hepatomas, and dense tumor stains are observed only in hepatomas. The mean survival period after angiography was 3.8 months, and the prognosis was not favorable in patients having "thread-and-streak" sign on angiography.

Adenocarcinoma↗