18F-FDG符合线路显像与异机CT图像融合诊断非小细胞肺癌复发转移的价值

目的 评价18F-脱氧葡萄糖(FDG)符合线路显像与异机CT图像融合诊断非小细胞肺癌(NSCLC)术后放化疗后复发转移的价值.方法 对可疑复发转移的40例NSCLC患者行18F-FDG符合线路显像,并于显像前后1周内行CT扫描.用三维(3D)图像融合软件进行图像融合.结果 在18F-FDG符合线路显像与CT扫描相同的范围内,40例患者共检出病灶58处,其中恶性52处,良性6处.融合图像诊断NSCLC复发转移的灵敏度、特异性、准确性、阳性预测值、阴性预测值、阳性似然比及阴性似然比分别为94.23%(49/52),5/6,93.10%(54/58),98.00%(49/50),5/8,5.65及0.07.图像融合灵敏度、准确性明显高于CT.单纯18F-FDG符合线路显像诊断效能与图像融合无差别,但与CT图像融合可明显提高对病灶的定位诊断(提高44.83%).结论 18F-FDG符合线路与CT图像融合诊断NSCLC术后放化疗后复发转移灵敏度高,定位准确,值得推广应用.     

~(18)F-FDG符合线路显像在喉癌中的应用价值

目的:探讨18F-FDG符合线路显像在喉癌中的应用价值。方法:30例经病理证实的喉癌患者术前行18F-FDG双探头符合线路显像及CT检查。其中28例行手术治疗,以术后病理检查结果作为"金标准",比较18F-FDG符合线路显像及CT检查在原发肿瘤、淋巴结及远处转移(TNM)中的价值。结果:18F-FDG与CT探测淋巴结病变的灵敏度为75.00%和62.50%,特异性78.26%和43.48%,准确性76.36%和54.55%,阴性预测值69.23%和45.45%,阳性预测值82.76%和60.61%,其中特异性、准确性差异有统计学意义(P0.05)1。8F-FDG符合线路显像发现2例有远处转移,改变了治疗方案。结论:18F-FDG符合线路显像在喉癌术前分期和治疗方案的制定中具有较好的临床应用价值。     

~(18)F-FDG PET/CT显像在霍奇金淋巴瘤分期及疗效评价的应用

目的探讨18F-FDG PET/CT显像对霍奇金淋巴瘤(hodgkin’s lymphoma,HD)的临床分期、疗效评价、监测复发及提示预后方面的应用价值。方法回顾性分析我院2005年~2011年病理活检和免疫组化确诊的51例HD患者的18F-FDG PET/CT显像结果,应用无进展生存(progression-free survival,PFS)期及总体生存(overall survival,OS)期作为随访指标,进行疗效评价。组间PFS率及OS率的比较采用X2检验;患者的生存分析采用Kaplan-Meier方法。结果23例HD患者于治疗前行18 F-FDG PET/CT显像,17.4%(4/23)患者分期上调。51例患者在完成全部治疗后行18 FFDG PET/CT显像,PET/CT显像结果阳性患者19例,阴性患者32例。阳性者及阴性者的中位PFS期分别为10个月和38个月,2年PFS率分别为5.2%(1/19)和64.5%(20/31),差异有统计学意义(X2=16.978,P=0.000);中位OS期分别为19个月和39个月,3年OS率分别为10.5%(2/19)和51.6%(16/31),差异有统计学意义(X2=8.631,P=0.003)。治疗后PET/CT显像的阳性预测值及阴性预测值分别为94.7%(18/19)、90.6%(29/32)。结论18 F-FDG PET/CT是HD患者明确分期、评价疗效、监测复发及提示预后方面的可靠方法,有助于临床早期判断疗效及制定个体化治疗方案。     

基于PET/CT的孤立性肺结节多模式影像对比研究

目的比较18F-FDG PET/CT融合图像、胸部薄层CT及18F-FDG PET/CT融合图像联合胸部薄层CT检查在诊断孤立性肺结节临床应用价值。方法回顾性总结2012年7月~2014年7月的40例孤立性肺结节(SPN)病例(男20例,女20例,年龄37~84岁,平均(59.2±12.4)岁。所有病例行18F-FDG PET/CT检查及胸部薄层CT扫描,37例患者最后由手术病理或穿刺病理确诊,3例经抗炎、抗结核治疗后复查,随访12个月以上。结果 40例SPN患者18FFDG PET/CT融合图像诊断灵敏度、特异性、PPV、NPV、准确性分别为75.9%、72.7%、88.0%、53.3%、75.0%;胸部薄层CT诊断SPN灵敏度、特异性、PPV、NPV、准确性分别为75.9%、63.6%、84.6%、50.0%、86.1%。18 F-FDG PET/CT融合图像联合胸部薄层CT诊断SPN灵敏度、特异性、PPV、NPV、准确性分别为93.1%、72.7%、90.0%、80.0%、87.5%。18F-FDG PET/CT融合图像及胸部薄层CT与18F-FDG PET/CT融合图像联合胸部薄层CT比较差距有统计学意义。结论 18F-FDG PET/CT联合应用胸部薄层CT对SPN诊断及鉴别诊断具有较高价值。     

18F-FDG符合线路显像对食管癌术后复发转移的诊断价值

目的 探讨^18F-脱氧葡萄糖（FDG）符合线路显像对食管癌术后复发转移的诊断价值。方法 对29例临床怀疑复发转移的食管鳞状细胞癌术后患者行^18F-FDG符合线路显像，计算其诊断复发转移灶的灵敏度、特异性和准确性，并与CT诊断结果比较。结果 29例患者中符合线路显像真阳性19例，真阴性6例，假阳性、假阴性各2例，其诊断食管癌术后复发转移的灵敏度、特异性和准确性分别为90．5％（19／21例）、75．0％（6／8例）和86．2％（25／29例）；而CT诊断的灵敏度、特异性和准确性分别为71．4％（15／21例）、87．5％（7／8例）和75．9％（22／29例）。在符合线路显像与CT检查均阳性的13例患者中，CT检出病灶20个；而符合线路显像检出27个，比CT多检出的病灶包括食管癌复发，锁骨上、纵隔和肺门淋巴结及骨转移。结论 ^18F-FDG符合线路显像对食管癌术后复发转移的诊断具有较高的临床价值，尤其在临床疑有复发转移而常规影像学检查阴性时有重要意义。     

18F-FDG PET/CT和增强MSCT评价食管癌淋巴结转移

目的 探讨18F-FDG PET/CT显像和增强多层螺旋CT(MSCT)检查评价食管癌淋巴结转移的价值.方法 食管癌患者46例,均在18F-FDG PET/CT检查前1周内行MSCT检查,并在18F-FDGPET/CT检查后1周内接受手术治疗,切除组织均行病理检查.采用16层MSCT增强扫描和18F-FDG PET/CT显像检查颈、胸和上腹部,分别观察食管癌原发病灶、转移淋巴结的部位及转移淋巴结组数,其结果与病理检查结果对照.比较18F-FDG PET/CT和增强MSCT诊断食管癌淋巴结转移的灵敏度、特异性、准确性、阳性预测值和阴性预测值.结果 46例食管癌中位于上胸段6例,中胸段32例,下胸段8例.手术清除326组淋巴结,病理检查证实其中83组内有肿瘤转移.18F-FDG PET/CT与增强MSCT诊断淋巴结转移的灵敏度、特异性、准确性、阳性预测值、阴性预测值分别为83.1%(69/83),96.3%(234/243),92.9%(303/326),88.5%(69/78),94.4%(234/248)与72.3%(60/83),98.4%(239/243),91.7%(299/326),93.7%(60/64),91.2%(239/262).2种方法诊断食管癌淋巴结转移的灵敏度差异有统计学意义(P=0.022),余诊断效能指标差别无统计学意义(P均＞0.05).在诊断食管旁淋巴结转移方面,18F-FDG PET/CT与增强MSCT的灵敏度分别为79.2%(19/24)与54.2%(13/24),差异有统计学意义(P=0.031).结论 18F-FDG PET/CT诊断食管癌淋巴结转移,尤其食管旁淋巴结转移的灵敏度高于增强MSCT,但MSCT增强扫描对于发现18F-FDG PET/CT显像阴性的淋巴结转移有重要价值,两者结合应用可明显提高对食管癌淋巴结转移的判断准确性.     

18F-FDG符合线路显像在卵巢上皮性癌术后监测中的价值

目的探讨18F-脱氧葡萄糖(FDG)符合线路显像在卵巢上皮性癌术后监测中的价值.方法对33例卵巢上皮性癌术后临床完全缓解6个月以上患者进行18F-FDG符合线路显像,经有序子集最大期望值法(OSEM)同时重建衰减与无衰减校正断层图像,用感兴趣区(ROI)技术计算病变/正常组织比值(L/B).并与同期CT、B超结果和血清CA125水平比较.20例施行2次探查术或再次肿瘤细胞减灭术的患者以病理学检查结果进行评判,13例未再次手术者以随访和其他检查结果进行评估.结果18F-FDG符合线路显像24例患者发现异常放射性浓聚灶,3例假阳性.衰减与无衰减校正图像L/B分别为4.9±4.3和4.2±4.0.9例未见异常放射性浓聚灶,4例假阴性.其灵敏度、特异性、准确性、阳性预测值和阴性预测值分别为84.0%、62.5%、78.8%、87.5%和55.6%.与CT、B超结果比较,准确性差异有显著性(x2=4.89、5.0,P均＜0.05).结论18F-FDG符合线路显像能弥补其他影像学检查的不足,增加诊断信息.     

18F-FDG符合线路SPECT显像联合CT、B超、MRI在结直肠癌术后复发及转移中的诊断价值

目的探讨18F-FDG 符合线路 SPECT 显像联合传统显像(CT、B 超、MRI)在结直肠癌术后复发及转移中的诊断价值.资料与方法107例结直肠癌术后患者行18F-FDG 符合线路 SPECT 显像,并联合 CT、B 超、MRI 诊断结直肠癌术后复发及转移.结果107例患者最终确定复发及转移共29例.18F-FDG 符合线路 SPECT 显像与传统显像诊断均为阳性的15例患者中,传统显像检出病灶20个,符合线路 SPECT 显像检出病灶26个.传统显像检出3个符合线路 SPECT 显像未发现的转移病灶,而符合线路 SPECT 显像检出9个传统显像未发现的病灶.18F-FDG 符合线路 SPECT 显像诊断结直肠癌术后复发及转移的灵敏度、特异性和准确率分别为79.3%、89.7%和86.9%;传统显像的诊断效能分别为62.1%、88.5%和81.3%;二者联合的诊断效能分别为89.7%、92.3%和91.6%.二者联合诊断结直肠癌术后复发及转移的灵敏度和准确率明显优于传统显像(P <0.05).结论18F-FDG 符合线路 SPECT 显像联合 CT、B 超、MRI 在监测结直肠癌术后复发及转移中具有重要临床价值.     

18F-FDG PET/CT在可疑神经系统副肿瘤综合征中的应用价值

目的 探讨18F-脱氧葡萄糖(FDG)PET/CT显像探测临床可疑神经系统副肿瘤综合征(PNS)患者潜在肿瘤病灶的应用价值.方法 回顾性分析20例可疑PNS患者18F-FDG PET/CT显像资料,对所有患者行随访病理检查或临床最终诊断,并将结果与PET/CT显像和随访结果进行比较.结果 20例中PET/CT显像发现可疑恶性病变或既往肿瘤复发和(或)转移者9例,阴性11例.9例阳性者中3例为假阳性.PET/CT显像对PNS恶性肿瘤检出的灵敏度、特异性、准确性、阳性预测值和阴性预测值分别为6/6,78.57%(11/14),85.00%(17/20),6/9和100.00%(11/11).6例真阳性中4例治疗方案得以修正,经抗肿瘤和免疫疗法后神经异常症状得到改善.结论 18F-FDG PET/CT显像在可疑PNS中的应用有积极意义,有助于发现恶性肿瘤,也能对肿瘤分期提供帮助.     

18F-FDG PET/CT在可疑神经系统副肿瘤综合征中的应用价值

目的 探讨18F-脱氧葡萄糖(FDG)PET/CT显像探测临床可疑神经系统副肿瘤综合征(PNS)患者潜在肿瘤病灶的应用价值.方法 回顾性分析20例可疑PNS患者18F-FDG PET/CT显像资料,对所有患者行随访病理检查或临床最终诊断,并将结果与PET/CT显像和随访结果进行比较.结果 20例中PET/CT显像发现可疑恶性病变或既往肿瘤复发和(或)转移者9例,阴性11例.9例阳性者中3例为假阳性.PET/CT显像对PNS恶性肿瘤检出的灵敏度、特异性、准确性、阳性预测值和阴性预测值分别为6/6,78.57%(11/14),85.00%(17/20),6/9和100.00%(11/11).6例真阳性中4例治疗方案得以修正,经抗肿瘤和免疫疗法后神经异常症状得到改善.结论 18F-FDG PET/CT显像在可疑PNS中的应用有积极意义,有助于发现恶性肿瘤,也能对肿瘤分期提供帮助.     

Role of (18)F-FDG dual-head gamma-camera coincidence imaging in recurrent or metastatic colorectal carcinoma.

(18)F-FDG PET has been shown to be of high diagnostic accuracy for the evaluation of recurrent colorectal cancer. However, the limited availability of PET scanners precludes (18)F-FDG assessment of many patients for whom the study is indicated. An alternative is the SPECT system in coincidence mode. The aim of this study was to determine the role of dual-head camera (18)F-FDG coincidence imaging (DHC (18)F-FDG) in patients with recurrent colorectal cancer. METHODS: Sixty-seven DHC (18)F-FDG studies were performed on 62 patients with suspected recurrent colorectal cancer. Reports of contemporary CT were available for the purpose of correlation for 61 of the studies. The final diagnosis of the imaging findings was based on histology or clinical and imaging follow-up of at least 6 mo. RESULTS: In lesion-based analysis, 103 tumor sites were suspected on DHC (18)F-FDG, CT, or colonoscopy. Ninety-three of them were found to be true tumor sites. For DHC (18)F-FDG, the sensitivity was 88%, specificity was 80%, positive predictive value (PPV) was 98%, negative predictive value (NPV) was 42%, and accuracy was 87%. For CT, the sensitivity was 63%, specificity was 10%, PPV was 85%, NPV was 3%, and accuracy was 57%. In patient-based analysis, DHC (18)F-FDG differentiated patients with recurrent cancer from disease-free patients with a sensitivity of 91%, specificity of 73%, PPV of 94%, NPV of 62%, and accuracy of 88%. DHC (18)F-FDG detected tumor sites in 12 (67%) of 18 patients with elevated carcinoembryonic antigen and negative CT findings. CONCLUSION: DHC (18)F-FDG is an adequate readily available technique for assessment of recurrent colorectal cancer and has a diagnostic accuracy better than that of CT.     

^18F-FDG符合线路显像在结直肠癌术后复发和（或）转移监测中的应用

目的评价^18F-脱氧葡萄糖（FDG）符合线路显像在结直肠癌术后复发和（或）转移监测中的价值。方法对56例结直肠癌术后6个月以上患者行^18F-FDG符合线路显像,经迭代法处理和重建,获得衰减校正后的断层图像,并与同期CT和癌胚抗原（CEA）检查结果进行对比。结果经再次手术病理、肠镜检查和随访观察56例患者中有33例发生复发和（或）转移,^18F-FDG符合线路显像诊断结直肠癌术后复发和（或）转移的灵敏度、特异性、阳性预测值、阴性预测值和准确性分别为81．8％（27／33）,87．0％（20／23）,90．0％（27／30）,76．9％（20／26）和83．9％（47／56）;CT分别为69．7％（23／33）,82．6％（19／23）,85．2％（23／27）,65．5％（19／29）和75．0％（42／56）;CEA的诊断效能分别为66．7％（22／33）,43．5％（10／23）,62．9％（22／35）,47．6％（10／21）和57．1％（32／56）。结论^18F-FDG符合线路显像监测结直肠癌术后复发和（或）转移有较大的临床应用价值,尤其在术后CEA水平升高的患者中,其诊断准确性较CT为高。     

Evaluation of therapy for lymphoma

Positron emission tomography (PET) using (18)F-fluorodeoxyglucose ((18)F-FDG) is the best noninvasive imaging technique for to assess response in patients suffering from lymphoma. Early response evaluation ("interim PET") after one, a few cycles, or at midtreatment can predict response, progression-free survival, and overall survival. We calculated from data of 7 studies an overall sensitivity to predict treatment failure of 79%, a specificity of 92%, a positive predictive value (PPV) of 90%, a negative predictive value (NPV) of 81%, and an accuracy of 85%. Although it is not yet indicated to change patient management based on residual (18)F-FDG uptake on interim scan in chemotherapy-sensitive patients, prospective studies evaluating the role of an interim PET in patient management clearly are warranted. (18)F-FDG PET also has an important prognostic role in relapsing patients after reinduction chemotherapy before high-dose chemotherapy (HCT) followed by autologous stem cell transplantation (ASCT). However, all chemotherapy-sensitive patients remain candidates for HCT followed by ASCT, even if (18)F-FDG PET showed residual (18)F-FDG uptake. We calculated from data of 3 studies an overestimated risk of relapse in 16% of all PET-positive patients. Some patients with residual (18)F-FDG uptake will have a good outcome after HCT followed by ASCT. (18)F-FDG PET is the imaging technique of choice for end-of-treatment evaluation. However, (18)F-FDG is not specific for tumoral tissue. Active inflammatory lesions and infectious processes can be falsely interpreted as malignant residual cells. However, a negative (18)F-FDG PET cannot exclude minimal residual disease. Consequently, it is always indicated to correlate PET findings with clinical data, other imaging modalities, and/or a biopsy. We calculated, from data of 17 studies in end-of-treatment evaluation, a sensitivity of 76%, a specificity of 94%, a PPV of 82%, a NPV 92%, and an accuracy of 89%.     

符合线路SPECT在消化系统肿瘤术后复发转移中的应用研究

探讨18F-FDG符合线路SPECT在消化系统肿瘤术后复发转移中的临床应用价值.材料和方法:对35例临床怀疑复发转移的消化系统肿瘤术后患者行18F-FDG符合线路SPECT显像,对其显像结果进行分析,计算其诊断的准确率、灵敏度、特异性、阳性预测值、阴性预测值及其95%可信区间,并与B超、CT、MRI的诊断结果相比较.结果:在35例消化系统肿瘤术后患者中,其诊断的准确率、灵敏度、特异性、阳性预测值、阴性预测值分别为91.4%、88.9%、100%、100%、72.7%;其95%可信区间分别为77%～98%、71%～98%、63%～100%、86%～100%、39%～94%.符合线路SPECT的诊断准确率、灵敏度明显高于B超,与CT和MRI的比较尚无显著性差异;95%可信区间分析,结果显示符合线路SPECT高于B超、CT和MRI;18F-FDG符合线路SPECT和B超、CT、MRI联合应用在某些病例的诊断中具有互补性.结论:18F-FDG SPECT/PET显像在消化系统肿瘤术后复发转移的诊断中具有较高的临床应用价值.     

18F-FDG符合线路显像在不明原发灶肿瘤中的临床价值

目的评价^18F-脱氧葡萄糖(FDG)符合线路显像在不明原发灶肿瘤(UPT)中的临床价值。方法UPT患者36例，在^18F-FDG符合线路显像后4周内进行常规影像学检查。结果^18F-FDG符合线路显像对原发灶的检出灵敏度为42％(15／36例)；1例原发灶仅被^18F-FDG显像发现，3例首先被^18F-FDG显像发现，后在^18F-FDG显像结果的提示下被其他影像学检查发现，11例同时分别被^18F-FDG显像和常规影像学检查发现；14％(5／36例)患者因找到原发灶而改变了治疗方案；53％(19／36例)患者发现新的转移灶。结论^18F-FDG符合线路显像是寻找UPT原发灶的一种有效方法，并可同时评价患者的全身转移情况，可为选择最佳治疗方案和预后评价提供依据。     

Clinical utility of 18F-FDG PET/CT in assessing the neck after concurrent chemoradiotherapy for Locoregional advanced head and neck cancer.

For patients with locoregional advanced head and neck squamous cell carcinoma (HNSCC), concurrent chemoradiotherapy is a widely accepted treatment, but the need for subsequent neck dissection remains controversial. We investigated the clinical utility of 18F-FDG PET/CT in this setting. METHODS: In this Institutional Review Board (IRB)-approved and Health Insurance Portability and Accountability Act (HIPPA)-compliant retrospective study, we reviewed the records of patients with HNSCC who were treated by concurrent chemoradiation therapy between March 2002 and December 2004. Patients with lymph node metastases who underwent 18F-FDG PET/CT > or = 8 wk after the end of therapy were included. 18F-FDG PET/CT findings were validated by biopsy, histopathology of neck dissection specimens (n = 18), or clinical and imaging follow-up (median, 37 mo). RESULTS: Sixty-five patients with a total of 84 heminecks could be evaluated. 18F-FDG PET/CT (visual analysis) detected residual nodal disease with a sensitivity of 71%, a specificity of 89%, a positive predictive value (PPV) of 38%, a negative predictive value (NPV) of 97%, and an accuracy of 88%. Twenty-nine heminecks contained residual enlarged lymph nodes (diameter, > or =1.0 cm), but viable tumor was found in only 5 of them. 18F-FDG PET/CT was true-positive in 4 and false-positive in 6 heminecks, but the NPV was high at 94%. Fifty-five heminecks contained no residual enlarged nodes, and PET/CT was true-negative in 50 of these, yielding a specificity of 96% and an NPV of 98%. Lack of residual lymphadenopathy on CT had an NPV of 96%. Finally, normal 18F-FDG PET/CT excluded residual disease at the primary site with a specificity of 95%, an NPV of 97%, and an accuracy of 92%. CONCLUSION: In patients with HNSCC, normal 18F-FDG PET/CT after chemoradiotherapy has a high NPV and specificity for excluding residual locoregional disease. In patients without residual lymphadenopathy, neck dissection may be withheld safely. In patients with residual lymphadenopathy, a lack of abnormal 18F-FDG uptake in these nodes also excludes viable tumor with high certainty, but confirmation of these data in a prospective study may be necessary before negative 18F-FDG PET/CT may become the only, or at least most-decisive, criterion in the management of the neck after chemoradiotherapy.     

18F-FDG符合线路显像在乳腺癌诊断中的初步应用

目的研究18F-FDGSPECT/CT符合线路正电子显像在鉴别乳腺肿块性质和乳腺癌术前淋巴结转移分期中的应用价值。方法22例有乳腺肿块的女性患者行SPECT/CT符合线路18F-FDG显像,患者禁食6h以上,肘静脉注射18F-FDG185MBq～296MBq。静注60min后开始发射和X线CT透射扫描,然后进行符合线路PET连续采集30min。图像经X线衰减校正和有序子集最大期望值法(COSEM)叠代重建后,得到横断面、冠状面、矢状面三维断层图像及CT与FDGSPECT的融合图像。结果22例患者均通过手术切除治疗并获得病理结果。其中,乳腺癌16例,乳腺良性肿瘤6例。FDGSPECT诊断乳腺癌的敏感度、特异性和准确度分别是93.75%、100%和95.45%,明显高于乳腺X射线摄片。16例乳腺癌患者,15例FDGSPECT分期与临床手术分期一致。利用SPECT/CT仪所配备的定位CT,15例乳腺癌患者的病灶可准确定位。结论SPECT/CT符合线路18F-FDG显像在乳腺癌的诊断、转移灶定位以及临床分期方面具有重要的临床应用价值。     

18F-FDG SPECT-CT在宫颈癌监测中的价值

目的 评价18F-FDG SPECT-CT在监测宫颈癌复发和(或)转移中的价值.方法 回顾性分析为评估宫颈癌是否复发和(或)转移而行18F-FDG SPECT-CT的62例患者的临床资料,以二次手术或局部活检病理或临床随访为最终结果,并与同期CT和鳞状细胞癌抗原(SCCA)检查结果对比.结果 经病理或临床随访证实,62例患者中有36例复发和(或)转移.18F-FDG SPECT-CT对宫颈癌复发和(或)转移监测的灵敏度、特异度、阳性预测值、阴性预测值及准确率分别为94.4%、92.3%、94.4%、92.3%、93.5%;CT分别为69.4%、80.8%、83.3%、65.6%、74.2%;SCCA检查分别为66.7%、46.2%、63.2%、50.0%、58.1%.结论 18F-FDG SPECT-CT监测宫颈癌复发和(或)转移有较大临床价值.