目的 应用多层螺旋CT(MSCT)进 行四期动态扫描对不同来源的肝转移瘤 的应用价值研究。方法 分别从MSCT四期 对微小肝转移瘤的检出数目、MSCT图像 是否能清楚显示转移癌的特征以及MSCT 图像判别诊断转移瘤的来源这3个方面， 研究MSCT四期动态对不同来源的肝转移 瘤的应用价值和意义。结果 MSCT四期都 可以检测出肝转移以及其原发灶，观察 平扫、动脉期增强和门脉期增强为主， 其中门脉期检测微小病灶数目更多，更 能具体显示微小病灶，门脉期与平扫和 动脉期增强检测病灶数目比较，数据差 异具有统计学意义(P<0.05)；MSCT四期 动态扫描均能准确显示转移癌的特征， 门脉期增强图像的病灶显示能准确对转 移瘤的来源进行判断。结论 多螺旋CT四 期动态扫描能清晰显示不同来源的肝转 移瘤，反应了病灶特征、位置以及与周 围脏器的关系，有利于临床的诊断和制 定正确的诊疗方案。

Objective To investigate the application effect of four-phrase dynamic scanning MSCT on liver metastases of different sources. Methods Form the checkout number of four-phrase MSCT to small liver metastases, MSCT image can or cannot show the features of metastatic cancer and sources of MSCT image to diagnose metastatic cancer, we study the application value and significance of four-phrase dynamic scanning MSCT on liver metastases of different. Results Four-phrase MSCT all can detect the liver metastases and its primary lesion, mainly were plain scan, arterial-phase scan and portal phase scan. Portal phase can detect and show more minute lesions. Compare the portal phase scan, plain scan and arterial-phase scan, the difference was statistically significant (P<0.05). Four-phrase MSCT all can accurately show the features of liver metastases and portal phase enhanced image can detect the sources of metastatic tumor. Conclusion Fourphrase dynamic scanning MSCT can clearly show liver metastases of different sources, it reflects the relationship between focos characteristic, location and adjacent organs and is benefit for clinical diagnosis.