微血流成像能准确鉴别和诊断胆囊息肉样病变

目的 探讨微血流成像（MFI）评价胆囊息肉样病变血流灌注特征及鉴别诊断的价值。方法 回顾性分析73例胆囊息肉样病变患者的临床资料和超声图像，根据病理结果分为肿瘤性息肉组（n=24）和非肿瘤性息肉组（n=49）。所有患者在胆囊切除术前均行常规超声、MFI和超声造影（CEUS）检查。比较彩色多普勒血流成像（CDFI）和MFI评价胆囊息肉样病变血流灌注特征的差异。运用加权Kappa一致性检验评估CDFI和MFI观察血流灌注特征与CEUS的一致性，并评价MFI在胆囊息肉样病变中的诊断效能。结果 MFI和CDFI在评价胆囊息肉样病变血流灌注特征方面差异具有统计学意义（χ2=37.684，P<0.001），MFI较CDFI能更准确显示息肉内血流灌注特征。CDFI和MFI对胆囊息肉样病变血流灌注特征评价与CEUS的一致性分别为0.118和0.816。MFI鉴别诊断肿瘤性息肉和非肿瘤性息肉的敏感性、特异性和准确性分别为75.00%、93.88%和87.67%。结论 MFI显示息肉的血流灌注特征与CEUS具有较好的一致性，其能准确鉴别诊断肿瘤性息肉和非肿瘤性息肉，为胆囊息肉样病变患者选择合适的治疗方式提供新的超声诊断依据。

Differential diagnosis of gallbladder polypoid lesions by micro-flow imaging

Objective To explore the value of micro-flow imaging (MFI) in evaluating blood flow characteristics and differential diagnosis of gallbladder polypoid lesions. Methods We retrospectively analyzed the clinical data and ultrasound images of 73 patients with gallbladder polypoid lesions, including 24 patients with pathologically confirmed neoplastic polyps (n=24) and 49 with non-neoplastic polyps (n=49). All the patients underwent conventional ultrasound, MFI and contrast enhanced ultrasound (CEUS) before cholecystectomy. The blood flow characteristics of the lesions in color Doppler flow imaging (CDFI) and MFI were compared, and the consistency of the findings by these two modalities with those of CEUS were evaluated by weighted Kappa consistency test. The diagnostic performance of MFI for gallbladder polypoid lesions was assessed. Results There were significant differences between MFI and CDFI in the evaluation of blood flow characteristics of gallbladder polypoid lesions (χ2=37.684, P<0.001). MFI showed better performance than CDFI in displaying the blood flow characteristics of the polyps. The consistency in the findings was 0.118 between CDFI and CEUS and 0.816 between MFI and CEUS. The sensitivity, specificity and accuracy of MFI in distinguishing neoplastic polyps from non-neoplastic polyps were 75.00%, 93.88% and 87.67% , respectively. Conclusion MFI has a good consistency with CEUS in displaying the blood flow characteristics of gallbladder polypoid lesions and can accurately distinguish neoplastic polyps from non-neoplastic polyps, thus providing new ultrasound diagnostic evidence to support clinical decisions on optimal treatments of gallbladder polypoid lesions.