Abstract: Objective To analyze the clinical effect of ultramicroangiography in differentiating the benign and malignant nature of breast diseases in the process of clinical diagnosis. Methods The clinical data of 67 patients with breast lesions treated in Hongqi Hospital affiliated to Mudanjiang Medical College from May 2019 to May 2021 were analyzed retrospectively. All patients were examined by ultrasound. The blood flow classification of breast lesions was Adle blood flow classification. The blood flow detection rates of color Doppler flow imaging (CDFI) and superb microvascular imaging (SMI) were compared. The distribution characteristics of vascular morphology in CDFI and SMI were analyzed, the vascular distribution patterns in the lesions were classified one by one, and the differences between benign and malignant lesions were compared. Results The detection rate of blood flow in breast lesions by SMI was significantly higher than that by CDFI. There were significant differences in Adler blood flow grade and vascular morphology between benign and malignant breast lesions by CDFI and ultramicro-angiography (SMI). The vascular morphology of benign lesions was mainly hypovascular, linear, curved and dendritic, while that of malignant lesions was mainly crabfoot-shaped, and the blood vessels were thick and twisted. Conclusion SMI can significantly improve the detection rate of blood vessels in breast lesions, and this technique mode can clearly observe the Adler blood flow classification of breast lesions and analyze the morphological characteristics of blood vessels in order to further distinguish between benign and malignant breast lesions.

Key words: superb microvascular imaging, breast lesions, good and bad nature, color Doppler ultrasound