关键词: 超声图像, 治疗区域, 边缘检测, 数学形态学

Abstract: According to the characteristic of High Intensity Focused Ultrasound（HIFU） treatment region in mode B ultrasonic monitoring image，the edge feature points of treatment region，which are abstracted by method of local maximum of wavelet transform modulus，are connected by combining the fuzzy logic.At last，the closed contour curve of treatment region of mode B ultrasonic monitoring image is obtained by morphology post-processing.The results show that the size of treatment region can be detected better from mode B ultrasonic monitoring image by this method which has broken through the chock point that the threshold is hard to fix on in traditional image segmentation methods.

Key words: ultrasonic image, treatment region, edge detection, mathematical morphology