| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a system carrying out cerebrovascular disease risk evaluation with little load to a subject and with a simple measuring means. <P>SOLUTION: The system comprises a sensor section 1, a circuit section 2, a calculating section 3, and an output section 4. The circuit section 2 is a functional section for driving the sensor section 1 and transmitting the signals detected in the sensor section 1 to the calculating section 3 and has a transmitting circuit 21, the first receiving circuit 22, and the second receiving circuit 23 and others. The transmitting circuit 21 is connected to a transmitting element 111 and a transmitting element 121, and drives these elements to generate continuous waves. A speed waveform calculating section 31 is connected to the first receiving circuit 22 and the second receiving circuit 23 and obtains the frequency of the reflecting continuous waves detected by the receiving elements 112, 122. Thereafter, the frequency of the reflecting continuous waves are compared with the frequency of the transmitting circuit 21 to detect the changing amount of the frequency. The velocity v of blood can be obtained from these values. <P>COPYRIGHT: (C)2010,JPO&INPIT |
