超声造影定量分析技术评价肝癌肿瘤血管生成的临床研究

目的 探讨实时超声造影定量分析技术评估肝癌肿瘤血管生成的可行性.方法 对33例经手术病理证实的原发性肝癌于术前1周进行超声造影,造影时仪器预设置和造影剂用量保持一致,动态影像经专用软件脱机分析和数学模型拟合,获得基础强度、强度增量(ASI)、峰值减半斜率(a2),上升斜率(a3)、显影时间(AT)、达峰时间(TTP)、上升时间(ACT)、峰值强度(PI)和曲线下面积(AREA)等参数.肝癌手术标本进行CD34抗体染色,由计算机读片记录肿瘤微血管密度(MVD),统计其与各超声造影参数的相关性.结果 肝癌病灶区的ASI、a2、a3、AT、TTP、PI和ACT与肝实质相应参数比较,差异均有统计学意义(P＜0.01);肿瘤区参数a2与MVD均值有相关性,肿瘤区标化的ASI和AREA参数与MVD均值有相关性,均为P＜0.05.结论 超声造影定量分析能客观地显示肝癌微循环的血流灌注情况,从而无创评估肝癌的肿瘤血管生成情况.

Quantitative assessment of angiogenesis in hepatocellular carcinomas with contrast-enhanced ultrasonography: preliminary clinical research

Objective To investigate the feasibility of contrast-enhanced ultrasonography(CEUS) in quantitative assessment of angiogenesis in patients with hepatocellular carcinoma(HCC).Methods Thirtythree patients with HCCs confirmed by pathology underwent CEUS in one week preoperatively.The presets and contrast dosage were fixed in all the studies.The new quantitative software with GAMMA fitting technique was used to analyze the dynamic images offline.The quantitative parameters such as baseline intensity,increased signal intensity(ASI),decent curvature(a2),up slope rate(a3),arrive time(AT), time to peak(TTP), accelerate time(ACT),peak intensity(PI),and area under curve(AREA) were calculated.The pathological specimen was stained with CD34 antibady and microvessel density (MVD) was calculated automatically.The correlation between parameters of CEUS and MVD was analyzed statistically.Results The parameters of ASI, a2, a3, AT, TTP, PI and ACT in the tumor were significantly different from those in liver parenehyma ( P＜0.01 ).The value of a2 in the tumor was correlated with MVD, the standardized ASI and AREA were correlated with MVD (P＜0.05).Conclusions The quantitative analysis with CEUS reflects the microvascular perfusion flow objectively.It provides a noninvasive imaging method to assess the angiogenesis in HCCs.