实时灰阶超声造影在肝脏局灶性病变诊断中的应用

目的 探讨肝脏局灶性病变的实时灰阶超声造影声像特征及其定性诊断价值.方法 对肝脏局灶性病变患者103例142个病灶进行团注法实时灰阶超声造影检查,分析超声造影声像特征.结果 本组病灶按始增方式分为5型,峰值声像分为4型,造影剂灌注方式分为7型.不同病灶的超声造影时相特征不同.实时灰阶超声造影定性诊断准确率为93.0%,显著高于常规超声和增强CT(x2=47.430,P<0.05).结论 病灶特征性的始增和造影剂灌注方式在鉴别诊断方面有很大帮助,峰值声像意义则不大.超声造影与常规超声、增强CT相比可显著提高肝脏局灶性病变的定性诊断率.

Application of real-time gray-scale contrast-enhanced ultrasonography in the diagnosis of hepatic focal lesion

Objective To investigate the character of real-time gray-scale contrast-enhanced ultrasonography (CEUS) and its clinical value in diagnosing hepatic focal lesion. Methods One hundred and three patients with 142 focal hepatic lesions were examined by CEUS after an intravenous administration of the contrast agent, then the characters of the images were analyzed. Results The initial contrast-enhanced signal patterns were classified into 5 modes, peak contrast-enhanced signal patterns into 4 modes, and contrast agent perfusion patterns into 7 modes. Different lesions had different characters of contrast-enhanced phases. The accuracy rate of the CEUS in diagnosing focal hepatic lesion was 93.0%. which was significantly higher than that of conventional ultrasound and contrast-enhanced CT (X2=47.430, P<0.05). Conclusions The characteristic initial contrast-enhanced pattern and contrast agent perfusion pattern are helpful in the differential diagnosis of hepatic focal lesion, while peak contrast-enhanced signal pattern is relatively unreliable. Compared with conventional ultrasound and contrast-enhanced CT, CEUS can dramatically improve the accuracy of qualitative diagnosis of hepatic focal lesion.