18F-FDG符合线路显像在食管癌术前分期中的价值

目的 探讨^18F-FDG符合线路显像在食管癌术前分期中的价值。方法 35例食管癌患者术前行^18F—FDG符合线路显像及CT检查，其中30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检查对原发肿瘤、淋巴结及远处转移（TNM）分期的价值；另5例发现远处转移，放弃手术治疗。结果 ^18F-FDG符合线路显像T分期与病理T分期比较符合率为63％（19／30）；^18F-FDG与CT探测淋巴结病变的灵敏度为60．00％和54．28％，特异性为94．44％和77．77％，准确性为84．80％和71．20％，阴性预测值为85．86％和81．39％，阳性预测值为80．77％和48．72％，其中特异性、准确性及阳性预测值差异有统计学意义。^18F—FDG符合线路显像发现5例远处转移，改变了其治疗方案。结论 ^18F-FDG符合线路显像对食管癌的术前分期、治疗方案的制定有临床应用价值。     

^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。     

符合线路显像在大肠癌术后复发转移中的临床应用

目的：探讨符合线路显像在大肠癌术后复发转移中的临床应用价值。方法：对31例临床怀疑复发转移的大肠癌术后患者行^18F-脱氧葡萄糖(FDG)符合线路显像，计算其诊断准确性、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:31例大肠癌术后患者中显像阳性19例，假阴性2例，无假阳性。其诊断准确性、灵敏度、特异性、阳性预测值、阴性预测值分别为93．5％，90．5％，100％，100％，83．3％；其95％可信区间为78％～99％，70％-99％，69％-100％，82％-100％，69％-100％。符合线路显像的诊断准确性明显高于B超和CT，灵敏度和阴性预测值明显高于B超；95％可信区间分析结果示符合线路显像高于B超、CT和MRI。结论:^18F-FDG符合线路显像对大肠癌术后复发转移的诊断有较高的临床应用价值。     

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.     

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显像用于鼻咽癌诊断及分期

目的 探讨^18F-脱氧葡萄糖（FDG）PET显像在鼻咽癌诊断中的价值。方法 回顾性分析33例鼻咽癌患者的^18F-FDG PET显像效果。其中初诊患者4例，治疗后29例。行常规头颈部或全身^18F-FDG PET显像。结果 ①33例患者中，鼻咽部有恶性病灶（原发或复发病灶）者16例，PET灵敏度为100％，假阳性2例，特异性为88．3％，准确性为93．9％。与PET显像前的21例CT或MRI结果相比较，PET3检出鼻咽部恶性病灶10例，较CT或MRI多检出2例。②33例中22例有转移灶，PET检出20例（90．9％），较PET显像前的其他检查多检出5例；PET显像和PET显像前的其他检查皆有3例假阳性。在检出转移病灶数方面，PET显像多发现1处或多处转移灶有13例，PET显像少发现转移灶的2例。结论 ^18F-FDG PET显像灵敏、准确、全面，在鼻咽癌的诊断、早期复发灶及全身转移灶检出方面有重要价值。     

18F-FDG hPET/CT显像在腹部消化系肿瘤的应用

目的 评价^18F-脱氧葡萄糖(FDG)符合线路显像结合图像融合(hPET/CT)探测可疑腹部消化系恶性肿瘤或肿瘤复发的临床价值。方法 对51例临床怀疑为腹部消化系恶性肿瘤或肿瘤复发患者行^18F-FDG符合线路显像，经迭代法处理和重建，获得经检查衰减校正后的断层图像和融合图像，以目测双盲阅片进行诊断分析，并与手术病理检查或CT和(或）MRI、临床随访作出的最后诊断结果进行对比。结果 ^18F—FDG符合线路显像对腹部消化系肿瘤诊断的灵敏度、特异性和准确性分别为94．1％，76．5％和88．2％；对结直肠癌复发的诊断灵敏度为94．1％，特异性为83．3％，准确性为91．3％。结论 ^18F—FDG符合线路显像对腹部消化系恶性肿瘤或肿瘤复发的诊断具有较高的灵敏度和准确性。     

18F-FDG符合线路显像诊断骨转移瘤的价值及与99Tcm-MDP骨显像的比较

目的 评价^18F-脱氧葡萄糖(FDG)符合线路显像在骨转移瘤诊断中的价值，并与^99Tc^m-亚甲基二膦酸盐(MDP)骨显像进行比较。方法因怀疑恶性肿瘤或骨转移而行^18F-FDG符合线路显像者55例，41例于^18F-FDG检查前后4周内进行了^99Tc^m-MDP全身骨显像。其中30例骨转移瘤患者，15例无骨转移瘤，10例^18F-FDG显像示可疑肿瘤直接骨侵犯(单独进行分析)。结果 ^18F-FDG符合线路显像和骨显像对骨转移瘤的灵敏度、特异性、阳性预测值、阴性预测值、诊断准确性分别为100％，93％，97％，100％，98％和95％，50％，75％，86％，77％，前者特异性、阳性预测值、诊断准确性显著高于骨显像(P=0．024，0．035，0．007)；^18F-FDG显像发现30例骨转移瘤患者中的20例有骨外原发或转移肿瘤。10例^18F-FDG显像示可疑肿瘤直接骨侵犯患者中，4例被证实有骨受累，6例无骨受累，而骨显像对骨受累情况均作出了正确判断。结论 ^18F-FDG符合线路显像对骨转移瘤的诊断有较高的灵敏度和特异性，并能发现骨外原发或转移性肿瘤；^99Tc^m-MDP骨显像对骨转移瘤也有较高的灵敏度，但特异性较差。     

18F-FDG PET显像在胃癌术后复发及转移中的应用

目的探讨^18F-脱氧葡萄糖(FDG)PET显像诊断胃癌术后复发及转移的价值。方法41例临床疑胃癌术后复发患者行^18F-FDG PET全身显像。图像分析采用视觉及半定量方法(标准摄取值，SUV)，并参考近期病理检查、CT或核素骨显像结果：结果①21例复发患者(经组织病理学、CT、核素骨显像及临床随访证实)，PET检出胃癌术后复发及转移的灵敏度为90．5％，特异性80．0％，阳性预测值、阴性预测值和准确性分别为82．6％、88．9％和85．4％。②21例术后复发及转移患者中，PET与CT均阳性13例共16例次，PET平均每例次检出病灶数多于CT。③12例术后复发及转移患者化疗后共进行15次PET复查。5例化疗后PET显像示病情好转，随访17～36个月均存活，7例化疗后PET显像示化疗效果欠佳．存活时间为6～10个月。结论^18F-FDG PET显像是诊断胃癌术后复发及转移的有用方法，并对监测胃癌术后复发的化疗效果有重要意义。     

^18F-FDG PET／CT显像诊断妇科肿瘤复发、转移的价值

目的探讨^18F-脱氧葡萄糖（FDG）PET／CT显像诊断妇科肿瘤复发、转移的价值,并评价其对临床再分期及治疗决策的影响。方法对47例临床可疑复发、转移的妇科肿瘤患者行^18F—FDG PET／CT显像,对PET、CT及PET／CT图像进行对比分析。采用SPSS12．0软件,对数据行∥检验、校正的,检验及确切概率法分析。结果47例患者中共发现病灶158处,其中恶性病灶149处,良性病灶9处。^18F-FDG PET／CT诊断妇科肿瘤复发、转移的灵敏度、特异性、准确性、阳性预测值及阴性预测值分别为95．97％（143／149）,6／9,94．30％（149／158）,97．95％（143／146）及50．00％（6／12）。PET／CT在诊断妇科肿瘤复发、转移的灵敏度、准确性及阴性预测值方面明显优于单纯CT（χ^2=18．198,18．890,6．825,P均〈0．05）;^18F-FDG PET／CT和单纯PET在各项诊断效能指标间差异无统计学意义（χ^2=0．632,0．000,0．459,0．000,0．150,P均〉0．05）,但PET／CT使33．54％（53／158）的单纯PET无法准确定位的病灶得到了准确定位。同单纯CT及PET相比,PET／CT分别使44．68％（21／47）和31．91％（15／47）的患者TNM分期改变,对T分期的影响最明显;共有19．15％（9／47）的患者临床分期改变,并改变相应的治疗决策。结论^18F—FDG PET／CT显像诊断妇科肿瘤复发、转移准确而全面,对临床再分期及治疗决策有重要影响。     

The benefit of functional-anatomical imaging with [18F]fluorodeoxyglucose utilizing a dual-head coincidence gamma camera with an integrated X-ray transmission system in non-small cell lung cancer

AIM: To evaluate functional-anatomical imaging with 2-[F]fluoro-2-deoxy-D-glucose (F-FDG) utilizing a dual-head coincidence gamma camera with an integrated X-ray transmission system for attenuation correction, anatomical mapping, and image fusion compared to conventional diagnostics by computed tomography (CT) in non-small cell lung cancer (NSCLC). METHODS: Thirty-five patients with NSCLC underwent FDG imaging of the thoracic area using a dual-head coincidence gamma camera (DHC) with an integrated X-ray transmission system. State-of-the-art CT scans had been performed before. Whole-body dedicated FDG positron emission tomography (PET) was performed immediately prior to DHC. Staging by CT and DHC, and DHC with integrated image fusion (FDHC) were re-evaluated with regard to detectable lesions, correct anatomical diagnoses, and clinical impact. Results of DHC and PET were compared for analysis of limitations of DHC. RESULTS: One hundred and thirteen tumour lesions were identified by CT. DHC detected 128 lesions overall: 102 true positive CT lesions were confirmed, 25 additional lesions were detected which affected staging in eight patients, and one false positive lung lesion did not show up in DHC. Nine CT lesions were missed by DHC (lymph node and lung). PET detected 150 areas of focally enhanced uptake, delivering two false positive results (nuchal muscles, pneumonia). Final evaluation confirmed 148 malignant lesions. Compared to CT, the results of DHC changed staging or treatment in 8/35 patients (23%). Lesion detection by DHC was limited by tumour size and intensity of FDG uptake. Image fusion provided relevant clinical information in 9/35 patients (26%). CONCLUSION: Functional imaging in NSCLC with this dual-head gamma camera is superior to morphological imaging by CT, although inferior to dedicated PET imaging. Combined functional-anatomical imaging has the potential to improve staging and localization procedures before surgery or radiotherapy.     

自体干细胞移植前后18F-FDG符合线路显像对非霍奇金淋巴瘤预后的评估价值

目的 探讨非霍奇金淋巴瘤(NHL)患者在自体干细胞移植(ASCT)前后行18F-脱氧葡萄糖(FDG)符合线路显像对于预测患者无进展生存期(PFS)的价值,并将结果 与CT检查进行对比分析.方法 29例经病理检查证实的NHL患者在ASCT前后均进行18F-FDG符合线路显像与CT检查,ASCT后随访时间均>1年.分别计算18F-FDG符合线路显像与CT检查的阳性预测值(PPV)、阴性预测值(NPV)和准确性,采用X2检验比较两者的结果 ,并采用Kaplan-Meier生存分析法行PFS分析.结果 ASCT前,18F-FDG显像的PPV、NPV和准确性分别为85.7%(12/14)、73.3%(11/15)和79.3%(23/29),高于CT检查的55.6%(10/18),45.5%(5/11)和51.7%(15/29);而在ASCT后,18F-FDG显像的PPV、NPV和准确性分别为92.3%(12/13)、75.0%(12/16)和82.8%(24/29),也分别高于CT检查的62.5%(10/16),53.8%(7/13)和58.6%(17/29);18?F-FDG显像和CT两者评价准确性差异有统计学意义(X2值分别为4.884和4.077,P均<0.05).ASCT前后18F-FDG显像阴性与阳性病例的PFS差异也有统计学意义(X2值分别为15.839和20.219,P均<0.005),而同期CT检查的阴性与阳性病例PFS差异无统计学意义(X2=2.468,P=0.116).ASCT前后,18F-FDG显像阴性和阳性患者的1年无进展生存率分别为86.7%(13/15)、87.5%(14/16)和28.6%(4/14)、23.1%(3/13).结论 ASCT前后18F-FDG符合线路显像均具有预测NHL预后的价值,且均优于CT检查.     

Gamma camera coincidence imaging with [18F]fluorodeoxyglucose in the pretreatment evaluation of patients with oesophageal cancer

This study investigated the role of [18F]fluorodeoxyglucose (FDG) dual-head gamma camera coincidence imaging (GCI) in the pretreatment evaluation of patients with oesophageal cancer. Twenty-two patients (20 men; mean age, 64 years) with untreated, biopsy proven squamous cell carcinoma of the oesophagus underwent positron emission tomography (PET) and GCI 1 and 3 h after a single injection of FDG, respectively. Computed tomography (CT) was performed within 2 weeks of the FDG imaging. The sensitivity of lesion detection was compared between GCI and PET. Regional (N) and distant (M) metastases detected by GCI were evaluated with reference to PET and CT. The staging obtained by each modality was also compared with pathological staging in nine patients who underwent surgery. FDG PET detected 22 primary tumours, 34 metastatic lymph nodes and four organ metastases. Of them, GCI detected all primary tumours, 24 (71%) metastatic lymph nodes, and none of the organ metastases. Lymph nodes missed by GCI were smaller in size and the majority of them were located in the thoracic region. GCI provided N and M staging identical to CT and PET in eight patients and improved staging over CT in four patients. On the other hand, GCI missed metastases detected by both PET and CT in five patients. The addition of GCI to CT could improve detection of patients with metastasis to 82% (18/22) compared with 64% (14/22) detected by CT alone. In patients with pathological staging (n = 9), GCI could influence management changes in two patients (22%). In conclusion, FDG GCI has a role that is complementary to CT in the initial staging of patients with oesophageal cancer, and due to the additional detection of nodal metastasis, GCI can provide staging information, which may influence changes in management.     

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。     

CT未检出原发灶的胸腔积液或肺不张患者18F-FDG显像结果分析

目的评价^18F-脱氧葡萄糖(FDG)符合线路显像(DHTC)寻找CT未能发现原发灶的胸腔积液或肺不张患者的肺癌原发灶，及其对肺癌伴有胸腔积液的患者胸腔积液良恶性鉴别诊断的价值。方法110例CT未发现肺部原发病灶但疑为肺癌及肺癌转移可能的胸腔积液或肺不张患者(其中胸腔积液8．4例，肺不张26例)，进行^18F-FDG DHTC检查。结果38例患者最终确诊为肺癌，其中伴有胸腔积液30例，伴有肺不张8例；另72例为肺部良性病变。^18F-FDG DHTC对CT未能找到原发灶的胸腔积液或肺不张患者肺癌诊断的灵敏度、特异性和准确性分别为97％、78％和85％。30例伴有胸腔积液的肺癌患者中，21例确诊为恶性胸腔积液。^18F-FDG DHTC对良恶性胸腔积液鉴别诊断的灵敏度为86％，特异性为8／9例。结论^18F-FDG DHTC是寻找胸腔积液或肺不张患者肺癌原发灶灵敏可靠的方法，并对良恶性胸腔积液的鉴别诊断有一定的临床价值。     

Preoperative assessment of cervical lymph nodes in head and neck cancer with fluorine-18 fluorodeoxyglucose using a dual-head coincidence camera: a pilot study.

The aim of this study was to investigate whether in patients with head and neck cancer, staging is possible with fluorine-18 fluorodeoxyglucose (18F-FDG) using a dual-head positron emission tomography (PET) camera. Twenty patients (ten men, ten women; mean age: 60 years) were studied using 185 MBq (5 mCi) 18F-FDG. Two of these patients who were suspected of having recurrence in the neck were restaged 19 and 12 months, respectively, after the resection of the primary tumour. The images were visually analyzed and the results were correlated with computed tomography (CT) (n = 18), ultrasonography (n = 17) and pathological findings. With respect to the primary tumour, FDG dual-head PET and CT revealed a sensitivity of 100% and 59%, respectively (P < 0.001). In seven patients lymph node metastases were found in the neck specimen. Two of them had bilateral metastases. FDG dual-head PET correctly identified all nine pathological neck sides whereas CT and ultrasonography depicted eight of nine and seven of eight pathological sides, respectively. In three patients, false-positive FDG uptake was seen, which was due to a preceding biopsy in two cases. The sensitivity of FDG dual-head PET, CT and ultrasonography in the identification of pathological neck sides was 100%, 89% and 87%, respectively, and the specificity was 90%, 93% and 50%, respectively. With knowledge of the preceding biopsies, the specificity of FDG dual-head PET would have been 97%. The smallest lymph node metastasis detected by FDG dual-head PET that was missed by CT had a diameter of 0.6 cm. Measurement of 18F-FDG with a dual-head PET camera is very sensitive in the detection of primary head and neck cancers and accurate in the preoperative assessment of lymph node metastases. The results justify a prospective study on the identification of metastases in patients with head and neck cancer. In addition, it is justified to start a study on the detection of unknown primary tumours in patients with cervical metastases.     

Comparison of FDG PET and positron coincidence detection imaging using a dual-head gamma camera with 5/8-inch NaI(Tl) crystals in patients with suspected body malignancies

The purpose of this study was to compare the diagnostic accuracy of fluorine-18 fluorodeoxyglucose (FDG) images obtained with (a) a dual-head coincidence gamma camera (DHC) equipped with 5/8-inch-thick NaI(Tl) crystals and parallel slit collimators and (b) a dedicated positron emission tomograph (PET) in a series of 28 patients with known or suspected malignancies. Twenty-eight patients with known or suspected malignancies underwent whole-body FDG PET imaging (Siemens, ECAT 933) after injection of approximately 10 mCi of 18F-FDG. FDG DHC images were then acquired for 30 min over the regions of interest using a dual-head gamma camera (VariCam, Elscint). The images were reconstructed in the normal mode, using photopeak/photopeak, photopeak/Compton, and Compton/photopeak coincidence events. FDG PET imaging found 45 lesions ranging in size from 1 cm to 7 cm in 28 patients. FDG DHC imaging detected 35/45 (78%) of these lesions. Among the ten lesions not seen with FDG DHC imaging, eight were less than 1.5 cm in size, and two were located centrally within the abdomen suffering from marked attenuation effects. The lesions were classified into three categories: thorax (n=24), liver (n=12), and extrahepatic abdominal (n=9). FDG DHC imaging identified 100% of lesions above 1.5 cm in the thorax group and 78% of those below 1.5 cm, for an overall total of 83%. FDG DHC imaging identified 100% of lesions above 1.5 cm, in the liver and 43% of lesions below 1.5 cm, for an overall total of 67%. FDG DHC imaging identified 78% of lesions above 1.5 cm in the extrahepatic abdominal group. There were no lesions below 1.5 cm in this group. FDG coincidence imaging using a dual-head gamma camera detected 90% of lesions greater than 1.5 cm. These data suggest that DHC imaging can be used clinically in well-defined diagnostic situations to differentiate benign from malignant lesions.     

18F-FDG PET/CT检测淋巴结转移性鳞癌原发灶的价值

目的 探讨18F-氟脱氧葡萄糖（FDG） PET/CT在淋巴结转移性鳞癌原发灶检测中的临床应用价值。 方法 选取2018年3月至2020年11月于广东省佛山市禅城区中心医院因发现淋巴结转移性鳞癌而原发灶不明行全身18F-FDG PET/CT检查的56例患者进行回顾性研究,其中男性44例、女性12例,年龄19~81岁,中位年龄51岁。所有患者的淋巴结转移性鳞癌均于18F-FDG PET/CT显像前经组织病理学检查确诊,原发灶经组织病理学检查或临床随访确诊。分析并计算18F-FDG PET/CT检测原发灶的检出率;原发灶与淋巴结转移部位、最大标准化摄取值（SUV_max）的关系。采用双变量相关分析法分析原发灶与淋巴结转移灶的SUV_max的相关性。 结果 56例患者中,18F-FDG PET/CT检测原发灶阳性44例（真阳性42例、假阳性2例）,检出率为75.0%;假阴性1例（鼻咽癌）;11例患者18F-FDG PET/CT未发现原发灶。双变量相关分析结果显示,原发灶与淋巴结转移灶的SUV_max在一定程度上具有一致性（r=0.320,P<0.05）。 结论 18F-FDG PET/CT显像对淋巴结转移性鳞癌的不明原发灶检测具有较好的临床应用价值,淋巴结转移灶与原发灶的18F-FDG代谢强度存在良好的相关性。     

^18F-FDG PET／CT及增强CT诊断原发性肝癌及肝癌术后复发的价值

目的比较^18F-脱氧葡萄糖（FDG）PET／CT与增强CT对原发性肝癌或肝癌术后复发的诊断价值。方法回顾性分析诊断为原发性肝癌或肝癌术后复发且进行^18F-FDG PET／CT与增强CT检查的病例共25例,2种检查间隔时间在1周内。其中原发性肝癌经手术或穿刺证实,肝癌术后复发经临床随访证实。结果25例患者中,确诊为原发性肝癌14例,其中肝细胞肝痛13例,胆管细胞癌1例;肝癌术后复发11例。^18F-FDG PET／CT对原发性肝癌的诊断阳性率为78．6％（11／14）,增强CT阳性率为92．9％（13／14）。在肝癌术后复发中,^18F-FDGPET／CT诊断阳性牢为100．0％（11／11）,增强CT阳性率为63．6％（7／11）。结论在原发性肝癌诊断中,增强CT优于^18F-FDG PET／CT,^18F-FDG PET／CT显像联合增强CT可明显提高诊断率。而在肝癌术后复发检测中,^18F-FDG PET／CT优于增强CT。