摘要
目的探讨鼻咽癌放疗后出现块影时,CT检查对鉴别肿瘤局部复发和放射性纤维化的价值。方法收集159例经CT检查的鼻咽癌,其中放疗后局部复发(RT)37例,放射性纤维化(RF)54例,以68例未经放疗的鼻咽癌(PT)作对比。使用ELScintsprint2000型CT机,测量放疗后出现的块影平扫和强化的CT值,用统计学的方差分析法处理增强前后的CT值差异。结果RT组平扫CT值为50.40±8.10Hu,增强为73.74±7.37Hu;RF组平扫为48.62±10.15Hu,增强为56.74±8.69Hu;对照组(PT)病变区平扫为48.32±9.20Hu,增强为72.38±7.75Hu。测量表明RT组有明显强化,RT组与RF组强化后CT值差异有非常显著性(P<0.01)。结论鼻咽癌放疗后出现块影时,CT增强扫描可作为鉴别诊断的重要方法。
Objective To evaluate enhanced CT examination in the differential diagnosis of local tumor recurrence and postradiation fibrosis when a mass appeared is observed after radiation therapy of carcinoma of nasopharynx. Methods 159 cases of nasopharyngeal carcinoma were examined by CT, including 37 cases of local recurrence(RT) after radiation therapy and 54 cases of postradiation fibrosis (RF) 68 cases of nasopharyngeal carcinoma (PT) before radiation therapy sened as comparison. Elscint sprint 2000 CT machine was used. The CT number of plain and enhanced examination of the mass appearing after radiation therapy were measured. Variance analysis was used as statistical management for CT number difference of different kinds of mass lesions before and after contrast enhancement. Results In the RT cases, the average CT number of the mass lesion for plain scan were 50.40±8 10 Hu, and for enhanced scan it was 73 74±7 37 Hu. In the RF cases plain scan 48 62±10 15 Hu, enhanced scan 56 74±8.69 Hu, In the control cases (PT), the CT number in the plain scan of lesion was 48.32±9.20 Hu, and 72.38±7.75 Hu in the enhanced examination. These measurement showed obvious enhancement of recurrence tumor. The CT number of contrast scan of RT and RF was obviousy different ( P <0 01). Conclusion If a mass lesion appears after radiation therapy in carcinoma of nasopharyx, enhancement of the lesion in CT scan is an important criterion for differential diagnosis.
出处
《中华肿瘤杂志》
CAS
CSCD
北大核心
1997年第3期203-205,共3页
Chinese Journal of Oncology
关键词
鼻咽肿瘤
放射疗法
肿瘤复发
CT
鉴别诊断
Nasopharyngeal neoplasms/radiotherapy Neoplasm recurrence, local Tomography, X ray computed Diagnosis, differential