良、恶性软组织肿块超声造影表现分析

目的 探讨良、恶性软组织肿块超声造影剂灌注时间-强度曲线特点.方法 对37例软组织肿块进行超声造影检查,用Q-LAB软件对感兴趣区造影动态图像进行伽马回归(Gamma-Variate)曲线拟合,进行定量分析,并与病理诊断对照,分析良、恶性病变的超声造影表现及增强特征.结果 37例软组织肿块经病理诊断确定良性21例,恶性16例.良性组肿块主要为均匀性增强(19/21)或无增强(2/21),恶性组肿块主要表现为均匀性增强(10/16)及不均匀性增强(6/16).良、恶性软组织肿块在曲线上造影剂到达时间(AT)及达峰时间(TTP)差异无统计学意义(P均＞0.05),而良性肿块的上升支斜率(A)及峰值强度(DPI)明显小于恶性肿块(P＜0.05).结论 超声造影时间-强度曲线分析能显示良、恶性软组织肿块的造影剂增强情况,对临床鉴别诊断有一定价值.

Application of time intensity curve of contrast enhanced ultrasound in the discrimination of benign and malignant soft tissue tumors

Objective To study the value of time intensity curve of contrast enhanced ultrasound in the discrimination of benign and malignant soft tissue tumors. Methods Thirty-seven cases of soft tissue tumors were carried out contrast-enhanced ultrasound examination. The region of interest in the dynamic images were chosen to carry out Gamma-Variate curve fitting through Q-LAB software and made a quantitative analysis. Then they were compared with pathological diagnosis to analyze the ultrasound imaging performance of benign and malignant tumors and their characteristics of micro-irrigation. Results Thirty-seven cases of soft tissue tumors were pathologically diagnosed 21 cases of benign and malignant in 16 cases. The perfusion of benign tumors were mainly uniformity (19/21) or potentialization (2/21). The perfusion of malignant tumors were mainly uniformity (10/16) or nonuniformity (6/16). There were no significant differences in time to peak(TTP) and arrival time of contrast agent(AT) between benign and malignant tumors( P ＞0.05). The upslope rate(A) and the derived peak intensity(DPI) in benign group were significantly less than malignant group ( P ＜0.05). Conclusions Time-intensity curve analysis of contrast-enhanced ultrasound showed that benign and malignant soft tissue tumors were different in perfusion,and it will be of a certain value for the clinical differential diagnosis.