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Red blood cell (RBC) aggregation, which is one of the induces showing blood viscosity, plays an important role in blood rheology. RBC aggregation is formed by adhension of RBCs because electrostatic repulsion between RBCs weakens as protein and saturated fatty acid in blood increase. Excessive RBC aggregation promotes various circulatory diseases in the clinical situation. The purpose of this study...
Atherosclerosis is the main cause of circulatory diseases, and it is very important to diagnose atherosclerosis in its early stage. In an early stage of atherosclerosis, the luminal surface of an arterial wall becomes rough due to injury of the endothelium. Conventional ultrasonic diagnostic equipments cannot detect such micron-order surface roughness because their spatial resolution is, at most,...
Recently, cardiovascular disease has become the second most common cause of death in Japan following malignant neoplasm formation. Therefore, it is necessary to diagnose atherosclerosis during its early stages because atherosclerosis is one of the main causes of cardiovascular diseases. The carotid sinus is a site that is easily affected by atherosclerosis [C. K. Zarins et al.: Circ. Res. 53 (1983)...
To provide useful information for diagnosis of atherosclerosis in addition to the imaging of morphology using the B-mode ultrasonography, we have developed a method in which an elasticity image is classified into tissue components using the reference data obtained by in vitro experiments. We have already measured the elasticity distributions for lipids, blood clots, fibrous tissue, and calcified tissue...
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