肺转移瘤18F-FDG PET/CT显像分析

目的 分析肺转移瘤的18F-FDG PET/CT显像结果 ,以期提高诊断正确率,减少漏诊和误诊. 方法 对68例肿瘤患者肺转移灶的18F-FDG PET/CT显像结果 进行回顾性分析. 结果 68例CT显示阳性病例中,PET显示阳性18例,部分阳性27例,总阳性率为66.18%;阴性23例,占33.82%.CT发现病灶数目575个,PET显示194个,PET检出率为33.74%.FDG有无摄取以及摄取的程度与转移灶大小有明显关系,与原发肿瘤的来源无关.随着病灶增大,PET阳性率和SUV值均明显增高. 结论 18F-FDG PET对肺转移瘤、尤其是单个转移灶的鉴别诊断价值有限.

Analysis of 18F-FDG PET/CT imaging of pulmonary metastasis tumors

Objective To analyze ¹⁸F-FDG PET/CT imaging of pulmonary metastasis tumors. Methods A total of 68 patients with various malignant tumors were clinically diagnosed, and images of ¹⁸F-FDG PET/CT were analyzed retrospectively. Results CT showed pulmonary metastasis tumors in all 68 patients, while PET scan revealed positive lesions in 18, partial positive in 27, and negative in 23 patients, resulting the positive ratio of 66.18%. CT detected 575 lesions, while PET scan detected 194 lesions with detection ratio of 33.74%. FDG uptake and SUV value were obviously related to the size of metastasis lesion, but not with the primary tumor. With the enlargement of lesions, both PET positive ratio and SUV value significantly increased. Conclusion Diagnostic value of ¹⁸F-FDG PET for pulmonary metastasis tumors, especially for single metastasis should not be over emphasized.