ULTRASONIC DIAGNOSTIC APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide an ultrasonic diagnostic apparatus that can recognize a nature variation on a blood vessel wall that varies according to types of disease including aneurysm, collagen disease, and diabetes and their severity, and can perform non-invasive diagnosis easily and accurately. SOLUTION: An ultrasonic driving equipment 11 sends a wave transmission command to an ultrasonic probe 12. The ultrasonic probe 12 transmits an ultrasonic wave vertically against a beating blood vessel and receives a reflection echo generated by the Doppler effect. A wave receiving circuit 13 amplifies the reflection echo. A comparison circuit 14 extracts a Doppler signal in the reflection echo. A noise filter circuit 15 eliminates noises in the Doppler signal. A frequency-voltage converter circuit 16 converts a frequency of the Doppler signal into a voltage. A calculation means 17 obtains a fractal dimension of a voltage output wave form of the reflection echo by fractal analysis using the box counting method. An output means 18 outputs a result calculated by the calculation means 17. COPYRIGHT: (C)2005,JPO&NCIPI