超声造影、CT对结直肠癌肝转移灶图像表现对比研究

Comparison on Image Characteristics of Liver Metastases of Colorectal Cancer in Contrast-enhanced Ultrasonography and CT

目的对比分析超声造影(CEUS)、CT对结直肠癌肝转移灶图像表现。方法选取本院2018年7月至2019年4月收治且经手术病理证实的72例结直肠癌肝转移患者作为研究对象。观察转移病灶位置、大小、增强方式及与周围肝实质强化程度等影像学特征。结果72例结直肠癌肝转移患者中,单发转移灶16例;多发转移灶56例,其中2~4个转移灶23例,5~8个转移灶14例,8个转移灶以上19例。常规超声可见低回声和高回声病灶,其中低回声31例,高回声41例。病灶平均(39.28±16.85)mm。CEUS检查显示70例患者增强扫描肝转移灶整体强化31例,周边强化41例;强化程度多高于肝实质。CT检查显示肝转移灶整体强化12例,周边强化56例;强化程度与CEUS一致,多高于肝实质。静脉期肝转移灶,CEUS和CT检查均显示强化程度下降,明显低于肝实质,呈低回声和低密度。结论CEUS与CT均可有效结直肠癌肝转移影像学特征,但CEUS对结直肠癌肝转移灶血流灌注的诊断价值更高.

Objective To compare and analyze the image characteristics of liver metastases of colorectal cancer in contrast-enhanced ultrasonography(CEUS)and CT.Methods 72 patients with liver metastases of colorectal cancer who were admitted to our hospital from July 2018 to April 2019 and confirmed by surgery and pathology were selected as the research subjects.The imaging features such as location,size,enhancement method and degree of enhancement of the surrounding liver parenchyma were observed.Results In the 72 patients with liver metastases of colorectal cancer,16 had single metastases;56 had multiple metastases,of which 23 had 2~4 metastases,14 had 5~8 metastases,and 19 had more than 8 metastases.Conventional ultrasound showed hypoechoic and hyperechoic lesions,of which 31 were hypoechoic and 41 were hyperechoic.The average lesion was(39.28±16.85)mm.CEUS examination showed that in the enhanced scan of liver metastases in 70 patients,31 patients showed overall enhancement and 41 patients showed peripheral enhancement.The degree of enhancement was higher than that of liver parenchyma.CT examination showed overall enhancement of liver metastases in 12 cases and peripheral enhancement in 56 cases.The degree of enhancement was consistent with that of CEUS,and was higher than that of liver parenchyma.In hepatic metastases in the venous phase,CEUS and CT examinations showed a decreasing in the degree of enhancement,which was significantly lower than that of the liver parenchyma,showing low echo and low density.Conclusion Both CEUS and CT can effectively show the imaging characteristics of liver metastases of colorectal cancer,but CEUS has higher diagnostic value in blood perfusion of liver metastases of colorectal cancer.