超声造影时间-强度曲线与伽马拟合曲线对肝细胞癌的诊断价值

Value of the time-intensity and gamma curves of the contrast-enhanced ultrasound in diagnosis of hepatocellular carcinoma

目的 探讨联合时间-强度曲线与伽马拟合曲线评估肝细胞癌的超声造影增强模式及其诊断意义.方法 回顾性分析34例经手术病理证实的肝细胞癌患者的超声造影图像,绘制时间-强度曲线,并在此基础上行伽马拟合曲线分析,得出各项定量参数：始增时间、上升支斜率参数、曲线尖度、拟合系数、达峰时间、达峰强度、达峰前平均强度、上升支斜率、达峰前面积.结果 与周边肝实质区相比,肿瘤区曲线上升快,下降快,峰值强度大,达峰时间早,上述参数差异均有统计学意义（P＜0.05）.结论 时间-强度曲线和伽马拟合定量分析软件能较为真实客观地反映肝细胞癌及肝实质间不同的灌注特点,为肝肿瘤的诊断和血流动力学研究提供量化指标及诊断依据.

Objective To investigate the value and the enhanced mode of time-intensity curve（TIC）combined with gamma curve of contrast-enhanced ultrasound in diagnosis of hepatocellular carcinoma.Methods The ultrasonic contrast images of 34 patients with hepatocellular carcinoma by the gamma curve were obtained by the time before,increased branch slope parameter, curve sharpness, gamma modulus, peak time,peak intensity, the average pre-peak intensity, increased branch slope and pre-peak area.Results Compared with the peripheral hepatic parenchyma, the curve of the tumor tissue ascended as well as declined more rapidly, peaked earlier with a more intensive peak value.There were significant differences between the two groups in all the data mentioned-above （P〈0.05 ）.Conclusions TIC and gamma fit quantitative analysis can reflect the different perfusion characteristics between hepatocellular carcinoma and normal hepatic parenchyma objectively and accurately,so as to provide the quantitative criterion and basis for the diagnosis and hemodynamic study of the hepatocellular carcinoma.