Abstract
Objective To compare the difference of colour Doppler flow imaging(CDFI) and superb-microvascular imaging (SMI) for detecting blood flow in cystic renal mass, and explore the consistency of conventional ultrasound combined with SMI and Contrast-enhanced ultrasonography(CEUS) in the diagnosis of renal cystic masses based on the Bosniak classification system, so as to evaluate the diagnosis value of SMI in renal cystic masses. Methods Fifty-five patients with renal cystic mass were enrolled in this study and underwent conventional ultrasound, CDFI and SMI. Patients with renal cystic mass at category Ⅱf or higher received contrast-enhanced ultrasonography additionally. The diagnostic performance of SMI and CEUS were evaluated based on final diagnosis obtained by follow-up or pathology diagnosis after surgery. Results In 55 cases, 44 cases got the pathological diagnosis afer surgical resection including 38 cases of malignant masses, and 6 cases of benign masses. CDFI and SMI showed significant difference in tumor flow imaging (P<0.05). Kappa Value of SMI and CEUS was 0.866. The sensitivity, specificity, accuracy, positive predictive value and negative predictive value of SMI were 94.8%, 75.0%, 89.1%, 90.2% and 85.7% respectively. Conclusions SMI is superior to CDFI in displaying micro-vascular of separated and solid structure in renal cystic masses. SMI has a better consistency with CEUS in Bosniak classification. SMI can improve the accuracy of non-invasive ultrasound in the diagnosis of renal cystic lesions. Key words: Ultrasonography; Kidney neoplasms; Superb microvascular imaging; Contrast-enhanced ultrasonography; Bosniak classification system
Published Version
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