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目的 探讨鼻咽癌 (NPC)增强CT表现和价值。方法 对 10 2例NPC放化疗前病人行平扫加增强扫描 ,观察癌灶密度变化、鼻咽表面线样强化层和癌灶周界情况。结果 平扫癌灶密度与同层面鼻咽肌相近的有 89例 (87% ) ,其余与翼外肌相近(13 % )。平扫难以明确癌灶的大小和范围 ,所能显示的仅是有无占位。增强扫描癌灶密度差异明显的占 44% ,单靠密度差异能使其周界全部或大部清楚的仅占 40 %。根据癌灶强化和线样强化层的表现 ,综合判断癌灶周界全部或大部清楚的达到 76%。结论 增强扫描对准确判断NPC癌灶的大小、范围以及对发现小的癌灶和鉴别诊断有重要作用。在主要针对鼻咽部本身的检查 ,增强也应列为常规扫描
Objective To investigate the performance and value of enhanced NPC in nasopharyngeal carcinoma (NPC). Methods One hundred and two NPC patients underwent radiography and contrast enhancement before radiotherapy and chemotherapy. The density of the lesion, the linear enhancement layer of the nasopharynx surface and the periphery of the tumor were observed. Results There were 89 cases (87%) with similar density of the lesion and nasopharyngeal muscles in the same level, and the rest were similar with the pterional muscles (13%). It is difficult to clear the size and scope of the foci, it can only show whether there is space. Forty-four percent of the lesions showed a significant difference in density of contrast-enhanced lesions, accounting for only 40% of all or most of the perimeter. According to the enhancement of the lesion and the performance of the linear enhancement layer, it can be concluded that all or most of the peritumor of the lesion clearly reaches 76%. Conclusions Enhanced scan is of great importance in accurately determining the size and range of NPC foci and finding small foci and differential diagnosis. In the main examination for the nasopharynx itself, the enhancement should also be classified as a routine scan