18F- FDG最大摄取值在判断非小细胞肺癌手术患者预后中的作用

目的 探讨18氟-脱氧葡萄糖(18F- FDG)最大摄取值(SUV)在判断可手术切除非小细胞肺癌(NSCLC)手术患者预后中的价值.方法 对82例NSCLC患者的术前SUV值(以11为分界点)与术后2 a无瘤生存率(DES)、总生存率的相关性进行回顾性分析.结果 TNM Ⅰ期和Ⅱ期术前原发灶SUV高值组术后DES显著低于低值组,Ⅰ期SUV高值组总生存时间显著短于低值组.结论 SUV测定在筛选TNM各期高危NSCLC患者及指导辅助治疗中有重要价值.     

^(99m)TcO_(4)^(-)甲状腺显像评估分化型甲状腺癌术后残甲的价值分析

目的探讨分化型甲状腺癌术后、^(131)I治疗前^(99m)TcO_(4)^(-)甲状腺显像评估残甲的临床应用价值。方法选取我科收治的56例分化型甲状腺癌患者,测定甲状腺蛋白(Tg)、甲状腺球蛋白抗体(TgAb)、促甲状腺激素(TSH),行^(99m)TcO_(4)^(-)甲状腺显像、^(131)I显像。分析^(99m)TcO_(4)^(-)甲状腺显像灵敏度、特异度、准确度、阳性预测值、阴性预测值、残甲灶检出率,残甲摄鍀计数与Tg/TSH相关性。结果^(99m)TcO_(4)^(-)甲状腺显像灵敏度86.79%,特异度66.67%,准确度85.71%,阳性预测值97.87%,阴性预测值22.22%,残甲灶检出率69.23%。残甲摄鍀计数与Tg/TSH显著相关(r=0.617,P<0.01)。结论分化型甲状腺癌术后、^(131)I治疗前^(99m)TcO_(4)^(-)甲状腺显像评估残甲临床应用价值较高,具有较高的灵敏度和阳性预测价值以及令人满意的残甲灶检出率。残甲摄鍀计数与Tg/TSH两者显著相关。     

梗阻性黄疸18F-FDGPET/MR成像中国专家共识

梗阻性黄疸病因复杂，定性和定位诊断具有挑战性。一体化正电子发射计算机断层成像/磁共振（Positron Emission Tomography/Magnetic Resonance, PET/MR）检查，通过PET与MR在梗阻性黄疸诊断中的优势互补，形成整合优势。在满足诊断需求的前提下，如何缩短PET/MR扫描时长、选择适宜的个性化扫描协议是临床关注的焦点。本文在文献复习和大量临床应用积累基础上，建立基于病灶是否具有显像剂聚集的简繁不同的MRI的成像协议和报告关键信息的专家共识。     

18F-FDG PET/CT显像在恶性胸膜间皮瘤诊断中的价值

Objective Malignant pleural mesothelioma (MPM) is an uncommon neoplasm arising from mesothelial cells of the pleura. The prognosis is poor with median survival of 4- 12 months. The aim of this study was to evaluate the clinic value of 18F-fluorodeoxyglucose (FDG) PET/CT imaging in the diagno-sis and to staging of MPM and to determine if the mean standardized uptake value (SUVmax) of primary tumor correlates with staging and prognosis. Methods Study was conducted retrospectively including 17 pa-tients with clinical suspicion of MPM from 2002 to 2008. Twelve cases of MPM and 5 cases benign pleural pa-thology were proven by histopathology and clinical follow-up. 18F-FDG PET/CT imaging was performed 1 h af-ter injection of 7.4 MBq/kg 18F-FDG. Patients with MPM confirmed by histopatholagy were divided into two groups: with and without metastasis. PET/CT findings were analyzed to determine if SUVmax of primary tumor correlates with staging and prognosis. Receiver operating characteristic (ROC) curve of SUVmax of primary tumor was evaluated to determine if it was a predictor of metastasis and survival time. Results The difference in SUVmax between MPM and benign pleural were statistical significant (5.78±1.81 vs 2.72± 2.51, t = 2. 8, P < 0.05). The diagnostic sensitivity, specificity and accuracy of 18F-FDG PET/CT imaging for MPM were 100% (12/12) , 4/5 and 94% (16/17). All 7 cases of bone and lymph node metastases were detected by 18F-FDG PET/CT imaging. Area under the curve (AUC) was 0.80. Conclusions 18F-FDG PET/CT imaging is useful in the diagnosis and staging of MPM. High SUVmax in the primary tumor correlates well with prognosis and predication of a greater propensity to have nodal and distant metastasis.     

FDG PET/CT显像对肺瘢痕癌的诊断价值

肺瘢痕癌较少见[1-3],PET/CT综合显示病灶代谢和形态学变化,可以早期发现瘢痕癌.     

良恶性肺孤立性小结节的PET-CT影像学特点分析研究

目的:探讨肺孤立性小结节的18F-脱氧葡萄糖(FDG)正电子发射计算机扫描与CT扫描融合显像(PET-CT)的影像学特点。方法:对经螺旋CT薄层扫描证实的45例肺部孤立性小结节(结节直径≤3cm)患者进行18F-FDGPET-CT显像,结节直径大小为0.8~3.0cm,经临床病理证实肺恶性病变27例,包括肺腺癌13例,鳞癌8例,肺泡癌2例,小细胞未分化癌2例,其他部位转移癌2例。良性病变18例,其中肺结核球10例,肺炎性假瘤6例,肺错构瘤2例。结果:在所检查的45例胸部病灶中,27例恶性病变,在肺内的分布比较弥散,且多发生在外周。在18例良性病变中,10例结核有6例发生于两肺上叶尖后段或下叶背段,4例发生在两肺上叶前段或下叶基底段,均为结核的好发部位。6例炎性假瘤多发生于两肺上叶前段或下叶基底段,也在其好发部位。结合PET的SUV与CT影像学特点共同分析诊断正确率为93.3%。单独以PET的SUV诊断,诊断正确率为82.2%。单独以CT影像诊断,诊断正确率为71.1%。结论:联合应用PET-CT的SUV指标和常规CT对肺结节的良恶性诊断的准确性优于单独CT或单独PET的SUV指标。     

18F-FDG PET/CT显像在恶性胸膜间皮瘤诊断中的价值

Objective Malignant pleural mesothelioma (MPM) is an uncommon neoplasm arising from mesothelial cells of the pleura. The prognosis is poor with median survival of 4- 12 months. The aim of this study was to evaluate the clinic value of 18F-fluorodeoxyglucose (FDG) PET/CT imaging in the diagno-sis and to staging of MPM and to determine if the mean standardized uptake value (SUVmax) of primary tumor correlates with staging and prognosis. Methods Study was conducted retrospectively including 17 pa-tients with clinical suspicion of MPM from 2002 to 2008. Twelve cases of MPM and 5 cases benign pleural pa-thology were proven by histopathology and clinical follow-up. 18F-FDG PET/CT imaging was performed 1 h af-ter injection of 7.4 MBq/kg 18F-FDG. Patients with MPM confirmed by histopatholagy were divided into two groups: with and without metastasis. PET/CT findings were analyzed to determine if SUVmax of primary tumor correlates with staging and prognosis. Receiver operating characteristic (ROC) curve of SUVmax of primary tumor was evaluated to determine if it was a predictor of metastasis and survival time. Results The difference in SUVmax between MPM and benign pleural were statistical significant (5.78±1.81 vs 2.72± 2.51, t = 2. 8, P < 0.05). The diagnostic sensitivity, specificity and accuracy of 18F-FDG PET/CT imaging for MPM were 100% (12/12) , 4/5 and 94% (16/17). All 7 cases of bone and lymph node metastases were detected by 18F-FDG PET/CT imaging. Area under the curve (AUC) was 0.80. Conclusions 18F-FDG PET/CT imaging is useful in the diagnosis and staging of MPM. High SUVmax in the primary tumor correlates well with prognosis and predication of a greater propensity to have nodal and distant metastasis.     

^99mTc-MIBI心肌三维立体显像在心肌梗塞诊断中的应用

对５例正常人，１８例心肌梗塞患者分别进行了ＳＰＥＣＴ心肌断层显像和三维立体显像。结果显示：三维立体显像和对正常人提供近似实际解剖标本的图像；在心肌梗塞显示病灶直观、形象。对心肌表层的梗塞病变，在解剖定位、病变范围及程度估价方面明显优于断层显像；诊断深部病变时应与断层显像结合。     

猫脑出血血肿周围组织糖代谢的18F-FDG PET/CT研究

目的：研究猫脑出血后血肿周同脑组织糖代谢的变化规律。方法：14只猫作为实验对象，取自体股动脉血1．0ml，在立体定向仪下注入猫右侧基底节处，制作猫脑出血模型，模型组按脑血肿手术形成后的时间分为2、6、12、24、48、72、120h共7组，每组2只；对照组2只，除不注血外，手术操作同模型组。每组动物行MR检查后，从股静脉注入^(18)F—FDG5mCi，40min后行PET／CT检查，并依据PET图像，对血肿周围脑组织进行放射计数的统计与分析。结果：①PET／CT能较清楚地显示猫脑正常结构及血肿、血肿周围组织的代谢变化；②从PET图像上观察，血肿形成2h，血肿周围脑组织^（18）F—FDG浓聚程度已发现明显减低，并明显低于镜像侧，术后6h达最低水平，72h开始明显恢复，120h双侧接近一致并开始恢复至对照组水平；③模型组血肿周围脑组织^（18）F—FDG放射计数值的分布呈现2-48h低计数，72h计数开始升高，120h时双侧接近并开始恢复至对照组水平。结论：血肿形成后2～48h双侧脑组织糖代谢率明显降低，且患侧明显低于镜像健侧，72h开始恢复，120h接近于对照组。