摘要
Ultrasonic biophysicists and physicians have continuously exhibited great interest in studying the ultrasonic properties of blood. It is shown that compressibility of red cell appears to be inversely proportional with its hemoglobin content. Among ultrasonic attenuation produced by red cell structure level in blood, absorption of red cell plays predominant role, viscous relative motion loss accounts for less than 15%, and cell scattering contribution is negligible. The coagulation process of blood is accompanied by significant change of sound parameters. The marked advantage has been found in test of blood coagulation process by using ultrasonic technique than the traditional viscous method. Blood coagulation causes sound attenuation, sound backscattering and nonlinearity parameter B/A to increase, but the attenuation frequency dependence hardly changes. All of these findings are of an important realistic significance for developing ultrasonic medicine.
Ultrasonic biophysicists and physicians have continuously exhibited great interest in studying the ultrasonic properties of blood. It is shown that compressibility of red cell appears to be inversely proportional with its hemoglobin content. Among ultrasonic attenuation produced by red cell structure level in blood, absorption of red cell plays predominant role, viscous relative motion loss accounts for less than 15%, and cell scattering contribution is negligible. The coagulation process of blood is accompanied by significant change of sound parameters. The marked advantage has been found in test of blood coagulation process by using ultrasonic technique than the traditional viscous method. Blood coagulation causes sound attenuation, sound backscattering and nonlinearity parameter B/A to increase, but the attenuation frequency dependence hardly changes. All of these findings are of an important realistic significance for developing ultrasonic medicine.
基金
The Project supported by National Natural Science Foundation of China
