Comparative study of superb micro-vascular imaging and power Doppler imaging in the diagnosis of different size solid breast tumors

Abstract

Objective To compare the diagnostic efficiency of superb micro-vascular imaging(SMI) and power Doppler imaging (PDI) in differentiating different size breast tumors. Methods Retrospective analysis were performent in a total of 170 cases of breast tumors of 144 patients screened with SMI and PDI in our hospital from August 2016 to July 2017, and pathological results were finally obtained. These tumors were divided into two groups according to the maximum diameter 2.0 cm. SMI and PDI diagnostic efficiency were compared by showing blood flow distribution, vascular morphology and Alder grade. Results There were 68 benign tumors and 102 malignant tumors.When the maximum diameter was no more than 2.0 cm, there were no significant difference in the blood flow distribution, vascular morphology and Alder grade between PDI and SMI of benign tumors(all P>0.05); However, there were significant differences in the vascular morphology and Alder grade of malignant tumors(all P 0.05) in benign tumors, but there was statistical difference in vascular morphology (P=0.001) in malignant tumors, and there was no significant difference in blood flow distribution, Alder grade in malignant tumors between PDI and SMI (all P>0.05). The area under the curve of ROC by PDI and SMI were 0.768 and 0.802, the difference was not statistically significant (P=0.447). Conclusions SMI can show the blood flow characteristics more clearly in breast tumors. When the maximum diameter is no more than 2.0 cm, SMI diagnostic efficiency is better than PDI. Key words: Ultrasonography; Breast neoplasms; Superb micro-vascular imaging; Power Doppler imaging