目的分析左肺上叶肺癌的螺旋 CT三期动态增强的典型影像特征。方法 选取我院2015年7月-2016年9月我院经临 床确诊的左肺上叶肺癌患者43例，患者均 行CT平扫和三期动态增强扫描，收集患者 影像学资料及临床资料，分析左肺上叶肺 癌在CT平扫及三期动态增强检查中的图 像表现，并对病情进行诊断，且需和手 术及病理结果进行对比。结果 43例左肺 上叶肺癌患者中轻度强化6例，中度强化 17例，高度强化7例，显著高度强化4例， 无强化9例。7例增强后早期，肿瘤内见血 管影，呈不规则条状影，可见分支，此7 例均为高度强化均为高度强化。43例患者 经外科手术发现病灶共48个，单发病灶者 38例，多发病灶者5例，CT扫描病灶检出 率为95.83%（46/48）。43例患者CT图像 特征分析发现形态不规则4例，密度、强 化不均匀6例，阻塞性改变7例，淋巴结肿 大或融合8例，有心包积液6例，肺癌远处 转移9例。结论 肺癌的强化多呈中度和高 度强化。CT三期动态增强对左肺上叶肺癌 检出率高，能良好显示肺癌的典型影像特 征。

Objective To analyze the typical imaging features of spiral CT three phase dynamic enhancement of left lung upper lobe lung cancer. Methods Select 43 cases of left upper lobe lung cancer diagnosed by our hospital in July 2015 September 2016, patients underwent CT scan and three stage dynamic enhanced scan, and the imaging data and clinical data were collected, to analyze the image features of left lung upper lobe lung cancer in CT scan and three phase dynamic enhanced scan, and to diagnose the disease, and compare it with the operation and pathological findings. Results The 43 patients with left upper lobe lung cancer, 6 were mildly enhanced, 17 moderately enhanced, 7 highly enhanced, 4 markedly enhanced, and 9 non enhanced. In the 7 cases, the blood vessel shadow was seen in the early stage of the tumor, which showed irregular stripes, and the branches were visible. All the 7 cases were highly enhanced and were highly intensified. In 43 patients, there were 48 lesions, 38 solitary lesions and 5 multiple lesions. The detection rate of CT scan was 95.83% (46/48). 43 cases of CT image features analysis showed irregular shape in 4 cases, density and reinforcement uneven 6 cases, obstructive change in 7 cases, lymph node enlargement or fusion in 8 cases, there were 6 cases of pericardial effusion, 9 cases of lung cancer metastasis. Conclusion The intensification of lung cancer is mostly moderate and highly intensified. The three phase dynamic enhanced CT has a high detection rate of lung cancer in the upper left lung, which can display the typical imaging features of lung cancer.