| 摘要 |
PURPOSE:To measure a low speed blood flow by storing plural Doppler deviation signals detected by a Doppler deviation detecting means, and executing a correlation operation of the present sample value and a sample value before plural samples stored in advance in a storage means. CONSTITUTION:An ultrasonic pulse sent out of a probe 1 is received by the same probe 1, and converted to an electric signal. It is sent to a transmitting/ receiving part 2, and thereafter, sent to a B mode detecting part 3, and also, sent to a D.S.C.5. An ultrasonic echo signal from the probe 1 is sent out to a Doppler detecting part 6, as well from the transmitting/receiving part 2. In this regard, this Doppler detecting part 6 corresponds to a Doppler deviation detecting means. A Doppler deviation signal is inputted to a power arithmetic part 9 and a complex correlation arithmetic part 10. A result of a complex correlation operation is sent to a phase arithmetic part 11 and a dispersion arithmetic part 12, and sent out to the D.S.C.5 as blood flow information together with an output of the power arithmetic part 9. B mode information and various blood flow information sent to the D.S.C.5 are brought to scan conversion, etc., to a form adapted to an ultrasonic scan and visualized by a display part 13. |
