【摘要】 目的探讨¹⁸F-FDG PET/CT对静脉瘤栓的诊断价值。方法回顾性分析34例静脉瘤栓患者的PET/CT资料,观察瘤栓放射性摄取程度及形态学改变,测量瘤栓及原发肿瘤的最大标准化摄取值(SU_max)。按照美国Mayo Clinic瘤栓分级标准,采用PET/CT及增强CT分别对20例肾脏肿瘤导致的下腔静脉瘤栓进行分级。分析静脉瘤栓与原发肿瘤SU_max的相关性和PET/CT与增强CT对瘤栓分级的一致性。结果瘤栓共累及53个静脉节段,以下腔静脉（n=16）、肾静脉（n=16）及门静脉（n=7）为主;瘤栓代谢高于血池本底51个,等于或低于血池本底各1个;48个呈条状,5个呈结节状;41个伴静脉增宽,31个患者瘤栓与原发肿瘤相延续。静脉瘤栓平均SU_max为7.54±5.06,原发肿瘤平均SU_max为9.25±6.17,二者呈正相关（r=0.76,P<0.001）。PET/CT明确诊断静脉瘤栓31例,诊断正确率为91.18%（31/34）。PET/CT与增强CT对瘤栓分级的一致性较好（Kappa=0.87,P<0.001）。结论 18 F-FDG PET/CT对静脉瘤栓具有良好的诊断价值。更多还原

【Abstract】 Objective To investigate the diagnostic value of ¹⁸F-FDG PET/CT in diagnosis of venous tumor thrombus（VTT）.Methods The PET/CT data of 34 patients with VTT were reviewed.The maximal standard uptake value(SU_max)of VTT and primary tumors,the morphological features of VTT were analyzed.PET/CT and contrast enhanced CT were used respectively to classify inferior vena cava tumor thrombus,according to the criteria of Mayo Clinic.The correlation of SU_maxbetween VTT and primary tumor,as well as the consistency of VTT classification between PET/CT and contrast enhanced CT were analyzed.Results Totally 53 venous segments were involved by tumor thrombus,most of which were inferior vena cava（n=16）,renal vein（n=16）and portal vein（n=7）respectively.Fifty-one segments of VTT increased,one equaled and one decreased FDG activity compared with blood pool respectively.VTT were linear in 48 segments,focal in 5segments.Forty-one segments were dilated.VTT were continued with primary tumors in 31 patients.The mean SU_maxof VTT was 7.54±5.06,and that of primary tumors was 9.25±6.17.There was a positive correlation between the mean SU_maxof VTT and primary tumors（r=0.76,P<0.001）.The diagnostic accuracy of PET/CT was91.18%（31/34）.PET/CT had a good consistency with contrast enhanced CT in classification of VTT（Kappa=0.87,P<0.001）.Conclusion ¹⁸F-FDG PET/CT is a valuable modality in diagnosis of venous tumor thrombus.更多还原