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1.
18F-FDG PET/CT结合高分辨率CT对孤立性肺结节的诊断价值   总被引:2,自引:1,他引:1  
目的探讨^18F-脱氧葡萄糖(FDG)PET/CT结合高分辨率CT(HRCT)对孤立性肺结节(SPN)的鉴别诊断价值。方法25例经手术病理检查或治疗随访证实的SPN(共27个)患者,同期行^18F—FDGPET/CT显像和病灶部位HRCT检查。^18F—FDGPET/CT用目测法结合半定量法判断良恶性。HRCT则根据病灶形态学特征判断良恶性。所得^18F—FDGPET/CT结果和^18F—FDGPET/CT与HRCT相结合结果分别与病理检查结果对照比较。结果27个SPN中15个恶性,12个良性。PET/CT正确诊断14个恶性和9个良性SPN。3个良性SPNPET/CT显像为阳性,其中2个经PET/CT和HRCT联合诊断为良性。联合诊断灵敏度和单纯PET/CT相同(93.3%),但特异性、阳性预测值、阴性预测值、准确性分别高于PET/CT(91.7%、93.3%、91.7%和93.7%对75.0%、82.4%、90.0%和85.2%)。结论^18F—FDGPET/CT结合HRCT是有效的无创性鉴别SPN良恶性的方法。  相似文献   

2.
正电子发射计算机体层摄影-CT诊断骨转移瘤的临床价值   总被引:9,自引:0,他引:9  
目的 应用^18氟-脱氧葡萄糖(^18F-FDG)正电子发射计算机体层摄影(PET)-CT全身显像,探讨PET、同机CT和PET—CT融合图像在骨转移瘤诊断中的价值。方法 共332例^18F-FDG PET—CT受检者中有35例发现骨异常病变。分别阅读和记录^18FDG PET图像、同机CT图像和PET-CT融合图像判断的良、恶性病变,比较3种方法在诊断骨转移瘤上的差异。结果 35例中共检出89个病灶,其中68个病灶最后确诊为恶性肿瘤骨转移,21个为良性病变。PET诊断骨转移病灶62个,诊断良性病变17个,诊断骨转移瘤的敏感性为91.2%(62/68个),特异性为81.0%(17/21个),准确性为88.8%(79/89个);同机CT诊断骨转移病灶55个,良性病变16个。诊断骨转移瘤的敏感性、特异性和准确性分别为80.9%(55/68个),76.2%(16/21个)和79.8%(71/89个);PET.CT融合图像诊断骨转移病灶64个,良性病变19个,诊断骨转移瘤的敏感性、特异性和准确性分别为94.1%(64/68个),90.5%(19/21个)和93.2%(83/89个)。结论 PET-CT融合图像在诊断骨转移瘤方面,可减少单用PET或单用CT诊断时的假阴性和假阳性,提高了鉴别骨良、恶性病变的能力。  相似文献   

3.
目的评价^18F-脱氧葡萄糖(FDG)PET/CT对胰腺良、恶性病变定性诊断的价值。方法对15例胰腺恶性病变,6例良性病变患者行全身^18F-FDGPET/CT和增强CT检查,根据PET、增强CT和PET/CT图像上的表现分别诊断,并将结果进行比较。结果PET和PET/CT准确诊断全部恶性病变,而增强CT准确诊断全部良性病变。PET和PET/CT在6例良性病变诊断中分别显示2例和1例假阳性,而增强CT在15例恶性病变中有2例假阴性,但在上述3种诊断方法中分别出现的假阳性或假阴性都得到了相互间的纠正。增强CT、PET和PET/CT三者在诊断胰腺恶性肿瘤上的准确性分别为90.5%,90.5%和95.2%。此外,PET/CT比增强CT检出了更多的肝脏、淋巴结和骨转移灶;两者检出病灶数量分别为35,41,9和16,24,3个。结论PET/CT在胰腺良、恶性病变定性诊断上有价值,PET/CT和增强CT联合应用有利于进一步提高对胰腺恶性肿瘤的诊断和分期准确性。  相似文献   

4.
目的 比较^11C-胆碱、18F-脱氧葡萄糖(FDG)和^18F-FDG双时相PET显像对鉴别肺部孤立性结节良恶性的价值。方法16例临床疑为肺肿瘤的患者进行^18F-FDGPET显像(注药后1h显像,2h后行延迟显像)、^11C-胆碱PET显像(3d内,于注药后10min进行)。图像判断以标准摄取值(SUV)作为半定量指标,异常放射性浓聚灶以SUV〉2.5为葡萄糖代谢增高,^18F-FDG延迟显像SUV上升≥10%为恶性病变(阳性),如下降或升高〈10%为良性病变(阴性);^11C-胆碱异常摄取灶以SUV〉2.0为阳性。所有病例进行随访,以显像诊断是否符合病理检查结果作为判断标准。结果病理检查结果证实12例肺癌,3例结核,1例结节病。^11C-胆碱PET显像确诊了12例肿瘤中的ll例,而^18F-FDG PET显像确诊10例(10/12例),双时相^18F-FDG PET显像确诊11例。4例良性病变者,^11C-胆碱PET显像能较好鉴别;而^18F-FDG PET显像2例假阳性,结合延迟显像仅1例假阳性。结论 ^11C-胆碱和^18F-FDG PET显像均能较好地鉴别肺部良恶性肿瘤。但^11C-胆碱和双时相^18F-FDGPET显像优于常规^18F-FDGPET显像,三者联合能提高对肺部病变的诊断效率。  相似文献   

5.
目的:评价^18氟-胸腺嘧啶核苷(^18F-FLT)正电子发射体层(PET)-CT显像对胸部肿瘤定性诊断的价值。方法:对17例做了^18氟-脱氧葡萄糖(^18F-FDG)PET-CT检查,但定性诊断困难的患者,在第2~3天进行了^18F-FLITPET-CT显像。分析病变在两种不同显像剂PET-CT上的表现,分别测量二者的最大标准摄取值(maxSUV)。结果:8例恶性病变(5例肺癌、1例纵隔淋巴瘤、1例胸椎恶性肿瘤、1例胸椎转移瘤),其中7例见FLT异常摄取,5例肺癌平均maxSUV为4.2(鳞癌2例、腺癌2例、肺泡癌1例);9例良性病变(5例肺结核、1例肺炎、3例纵隔淋巴结结核)无或轻度摄取FLT,其中6例肺内良性病变平均maxSUV为1.6;9例良性病变中8例见FDG异常浓聚,其中6例肺内良性病灶平均maxSUV为3.9,3例纵隔淋巴结结核也见FDG明显摄取,平均maxSUV为11.0。11例肺内病灶FDG和FLT显像的敏感性、特异性、准确性分别为100.0%(5/5)、16.7%(1/6)、54.5%(6/11)和80.0%(4/5)、66.7%(4/6)、72.7%(8/11)。结论:胸部肿瘤^18F-FLT显像的特异性较高,在^18F-FDG显像阳性,难以确定病变性质时,FLIT可以作为FDG的有益补充,二者联合显像有助于提高胸部肿瘤诊断的准确性。  相似文献   

6.
目的评价^18F-脱氧葡萄糖(FDG)PET/CT全身显像探测肿瘤患者意外病灶的临床价值。方法回顾性分析澳大利亚Peter MaeCallum肿瘤医院PET/CT中心2002年8月~2003年7月1727例肿瘤患者^18F—FDGPET/CT全身显像报告,男980例,女747例,中位年龄63岁,随访37个月(中位时间为27.5个月)。意外病灶指新发现的与原发肿瘤无关的良性病灶或第2原发肿瘤。通过分析病历记录、病理结果、其他影像学检查结果及临床随访,确定病灶最终结果。结果1727例患者共发现238例(13.8%)有意外病灶,其中213例220个意外病灶具有完整的随访资料。60个病灶怀疑为意外第2原发肿瘤,其中21.7%(13/60)证实为真阳性,70.0%(42/60)为假阳性,8.3%(5/60)至研究结束时未得到证实。38个甲状腺意外良性病灶,其中9个被证实为临床前恶性或恶性病灶,26个良性,3个未能证实。38个纵隔意外良性病灶,其中86.8%(33/38)证实为良性,7.9%(3/38)为原发肿瘤淋巴结侵犯,5.3%(2/38)未能证实其性质。其他部位84个意外良眭病灶,94.0%(79/84)证实为真阴性,6.0%(5/84)未能证实。共22例患者被证实存在第2原发肿瘤病灶,占本研究总人群的1.3%。结论^18F—FDGPET/CT全身显像是目前探测肿瘤患者意外病灶较好的无创方法,为制定临床治疗方案提供及时准确的依据。  相似文献   

7.
18F-FDG PET/CT显像在原发性乳腺肿瘤鉴别诊断中的应用   总被引:7,自引:1,他引:7  
目的探讨^18F-脱氧葡萄糖(FDG)PET/CT显像鉴别诊断乳房肿块良恶性的临床价值。方法乳房肿块患者34例,按体重5.55MBq/kg静脉注射^18F-FDG后40min行胸部俯卧位PET/CT显像,必要时加做3h延迟显像。经衰减校正后以半定量分析法[测定病灶的标准摄取值(SUV)及靶组织/非靶组织比值(T/NT)]及目测法进行图像分析,并与病理检查结果对照。结果手术病理检查证实乳腺癌27例,良性病变7例。^18F-FDG PET/CT显像目测法对乳房肿块良恶性鉴别的灵敏度为92.59%,特异性为6/7例,阳性预测值为96.15%。结论^F-FDG PET/CT显像是目前鉴别诊断乳房肿块性质较好的无创性检查方法。  相似文献   

8.
^18F-FDG PET/CT在胰腺癌诊断中的价值   总被引:3,自引:0,他引:3  
目的评价^18F-脱氧葡萄糖(FDG)PET/CT鉴别诊断胰腺良恶性病变及检测淋巴结和(或)远处转移的价值。方法回顾性分析上海交通大学医学院附属仁济医院行^18F—FDGPET/CT检查的46例临床疑胰腺肿瘤患者的影像学检查资料和临床资料,其中胰腺癌患者26例,良性病变者20例,比较分析PET和CT的特征。结果当选择最大标准摄取值(SUVmax)=2.95为判断良恶性的界值时,对胰腺癌诊断的灵敏度是88.5%(23/26),特异性是85.0%(17/20)。^18F—FDGPET/CT显像假阳性3例,假阴性3例。同时发现16例检查前未确定的肝、肺、骨及淋巴结转移患者。根据显像结果,11例患者治疗方案得以修正。结论根据现有资料分析,^18F—FDGPET/CT是鉴别诊断胰腺良恶性病变及检测胰腺癌患者淋巴结和(或)远处转移一种较好的方法。  相似文献   

9.
PET/CT与增强CT检测乳腺癌及其腋淋巴结转移的对照研究   总被引:5,自引:1,他引:4  
目的探讨^18F-脱氧葡萄糖(FDG)PET/CT显像与螺旋CT增强扫描检测乳腺癌及其腋淋巴结转移的临床价值。方法27例乳腺肿块患者于同日行^18F—FDG PET/CT显像与CT增强扫描。患者俯卧于乳腺专用泡沫垫上接受检查,前者图像由3位核医学科医师采用目测法结合半定量法进行诊断,后者图像由3位影像科医师分析诊断;最后与病理检查结果对照。结果27例患者PET/CT与增强CT均发现31个乳腺肿块,病理检查证实其中21个为乳腺癌,10个为良性病变;发现腋淋巴结91个,共有66个转移(1例有双侧腋淋巴结转移);PET/CT显像检测乳腺癌原发灶的灵敏度为80.95%,特异性为90%,阳性预测值为94.44%;检测淋巴结转移的灵敏度为89.39%,特异性为88%,阳性预测值为95.16%。增强CT检测乳腺癌原发灶的灵敏度为90.48%,特异性为60%,阳性预测值为82.61%;检测淋巴结转移的灵敏度为86.36%,特异性为52%,阳性预测值为82.61%。^18F—FDG PET/CT和增强CT对腋淋巴结状态的诊断与病理检查结果的列联系数分别为0.64和0.37;两者对乳腺癌及其腋淋巴结转移的诊断特异性差异有显著性(P〈0.05);对直径〈2cm的病灶,^18F—FDG PET/CT诊断准确性明显高于增强CT(P〈0.05)。结论^18F—FDG PET/CT对诊断乳腺癌及其腋淋巴结转移的特异性均高于增强CT。  相似文献   

10.
双时相18F-FDG PET显像用于肿瘤良恶性鉴别诊断   总被引:1,自引:0,他引:1  
目的探讨双时相^18F-FDG PET显像在肿瘤良恶性鉴别中的临床价值。方法52例单次显像难以鉴别病变性质的患者行双时相全身^18 F-FDG PET/CT显像,将显像结果与病理学检查结果对照。结果43例延迟显像SUV升高的患者中有39例经病理检查证实为恶性病变,4例为良性病变;9例延迟显像SUV降低的患者中有7例经病理检查证实为良性病变,2例为恶性病变。灵敏度为95.1%,准确性为88.5%,特异性为63.6%,阳性预测值为90.7%,阴性预测值为7/9例。结论双时相^18F—FDG PET对良恶性病变的鉴别具有较高的灵敏度和准确性。  相似文献   

11.
Acute limping may be the result of multiple pathologies in children. The differential diagnosis varies based on the age of the child. Irrespective of age, the initial imaging work-up includes AP and frog leg radiographs of the pelvis and ultrasound; MRI may sometimes be helpful. In children less than 3 years, infections and trauma are most frequent. MRI is the imaging modality of choice when osteomyelitis is clinically suspected. Between the ages of 3 and 10 years, transient synovitis of the hip and Legg-Calvé-Perthes disease are main considerations but infection, inflammation and focal bony lesions are also considered. In children over 10 years, slipped capital femoral epiphysis also is considered.  相似文献   

12.
KEY POINTS ·High-intensity interval training(HIT)is characterized by repeated sessions of relatively brief,intermittent exercise.often performed with an“a11 out”effort or at an intensity close to that which elicits peak oxygen uptake(i.e.,≥90%of VO2 peak).  相似文献   

13.
In response to the ENFSI and EDNAP groups’ call for new STR multiplexes for Europe, Promega® developed a suite of four new DNA profiling kits. This paper describes the developmental validation study performed on the PowerPlex® ESI 16 (European Standard Investigator 16) and the PowerPlex® ESI 17 Systems. The PowerPlex® ESI 16 System combines the 11 loci compatible with the UK National DNA Database®, contained within the AmpFlSTR® SGM Plus® PCR Amplification Kit, with five additional loci: D2S441, D10S1248, D22S1045, D1S1656 and D12S391. The multiplex was designed to reduce the amplicon size of the loci found in the AmpFlSTR® SGM Plus® kit. This design facilitates increased robustness and amplification success for the loci used in the national DNA databases created in many countries, when analyzing degraded DNA samples. The PowerPlex® ESI 17 System amplifies the same loci as the PowerPlex® ESI 16 System, but with the addition of a primer pair for the SE33 locus. Tests were designed to address the developmental validation guidelines issued by the Scientific Working Group on DNA Analysis Methods (SWGDAM), and those of the DNA Advisory Board (DAB). Samples processed include DNA mixtures, PCR reactions spiked with inhibitors, a sensitivity series, and 306 United Kingdom donor samples to determine concordance with data generated with the AmpFlSTR® SGM Plus® kit. Allele frequencies from 242 white Caucasian samples collected in the United Kingdom are also presented. The PowerPlex® ESI 16 and ESI 17 Systems are robust and sensitive tools, suitable for the analysis of forensic DNA samples. Full profiles were routinely observed with 62.5 pg of a fully heterozygous single source DNA template. This high level of sensitivity was found to impact on mixture analyses, where 54–86% of unique minor contributor alleles were routinely observed in a 1:19 mixture ratio. Improved sensitivity combined with the robustness afforded by smaller amplicons has substantially improved the quantity of data obtained from degraded samples, and the improved chemistry confers exceptional tolerance to high levels of laboratory prepared inhibitors.  相似文献   

14.
Objective To evaluate the preliminaily clinical efficacy and retrievability of a retrievable hinged covered metallic stent in the treatment of the bronchial stump fistula (BSF). Methods Between April 2003 and March 2005, 8 patients with bronchial stump fistula after pneumonectomy or lobectomy were treated with two types (A and B) of retrievable hinged covered metallic stents. Type A stent was placed in 6 patients and type B in 2 under fluoroscopic guidance. The stent was removed with a retrieval set when BSF was healed or complications occurred. Results Stent placement in the bronchial tree was technically successful in all patients, without procedure-related complications. Immediate closure of the BSF was achieved in all patients after the procedure. Stents were removed from all patients but one. Removal of the stents was difficult in two patients due to tissue hyperplasia. Patients were followed up for 6 - 21 months. Placement of the stents remained stable in all patients except one due to severe cough. Permanent closure of BSF was achieved in 7 (87.5%) of 8 patients. Conclusion Use of a retrievable hinged covered expandable metallic stent is a simple, safe, and effective procedure for closure of the BSF. Retrieval of the stent seems to be feasible. (J Intervent Radiol, 2007, 16: 253-257)  相似文献   

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Zusammenfassung Bei der rechtsmedizinischen Identifizierung kann die Identität im strengen Sinn allenfalls bei lebenden Personen festgestellt werden; sonst läßt sich nur von Teilen auf das Ganze (vom Untersuchungsobjekt auf die Person) schließen, wobei die verschiedenen Merkmale des Untersuchungsobjektes entsprechend der Hdufigkeit ihres Vorkommens eine unterschiedliche Beweiskraft haben. Bei der Schädelidentifizierung mit Hilfe moderner photographischer oder elektronischer Superprojektionsverfahren ergeben sich unter Berücksichtigung der Weichteildicken so viele (fiktive) Vergleichspunkte, daß bei geeignetem Vergleichsmaterial (Photographien) Identität wegen der Vielzahl übereinstimmender Bezugspunkte in den meisten Fällen evident ist.  相似文献   

19.
This is a review of the role of imaging procedures for the assessment of abdominal and pelvic lymph nodes. The diagnosis of malignant lymphatic spread is rarely the sole purpose of imaging, because it is usually part of a general abdominal examination, most frequently with CT or US, or increasingly with MRI. These studies are often requested in order to obtain information about the situation to be encountered during surgery, or to alert the surgeon to irresectability or to unexpected metastases outside the initially planned area of exploration. In most surgically treated tumours the role of imaging for preoperative staging is limited, due either to its insufficient sensitivity or because the initial treatment is independent of the lymph node stage. Imaging is commonly used to verify treatment response to chemo- or radiotherapy and for follow-up.Correspondence to: S. Delorme  相似文献   

20.
目的:探索CT-SIM三维定位系统、体模固定技术和PET-CT融合影像导引定位技术在胸部肿瘤经皮穿刺活检中的应用价值。方法:对380例胸部肿瘤患者行改进的CT定位技术下的经皮穿刺活检术。根据肿瘤的大小、深度、毗邻关系、活动度以及患者的心肺功能状态,综合运用CT-SIM系统、体模固定技术和PET-CT融合影像导引技术,为患者进行穿刺前定位。统计穿刺定位时间长度、成功率、确诊率、并发症发生情况,并与210例采用传统铅栅定位下胸部肿瘤穿刺活检的相应资料进行比较。结果:采用改进的CT定位技术的380例患者穿刺定位精确,平均定位时间(9.5 min)较传统方法(16.8 min)缩短7.3 min,活检成功率和确诊率分别是98.7%和95.3%,高于传统定位方法的93.3%和83.3%,两者差异均具有统计学意义(P〈0.05)。穿刺并发症发生率相似,气胸发生率分别为2.8%和2.9%,咯血发生率分别为11%和12.8%。结论:根据患者状态及肿瘤特点,在CT-SIM系统快速精确定位技术的基础上,综合运用体模固定技术和PET-CT融合影像导引技术,能显著缩短经皮穿刺活检的定位时间,提高活检成功率。  相似文献   

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