Abstract:

A method using BP neural network was presented to check biological tissue denaturation based on grey value and wavelet transform coefficient of Mode B Ultrasonic Image in HIFU treatment. The digital subtraction was executed for mode B ultrasonic images obtained from fresh vitro pork before and after HIFU radiation, and then its image features were extracted and classified by neural network . Through analyzing the statistical properties and errors of plentiful experimental data, the distinguishing effects could be obtained with finished. The results show that combining the average grey with the wavelet transform coefficient to construct BP neural network, the denaturation of biological tissue can be monitored better during HIFU therapy.

Key words: high intensity focused ultrasound(HIFU);wavelet transform;BP neural network;biological tissue denaturation