&& PrevFigure 1:From:
doi: 10.3332/ecancer.Figure 1:(a) Coronal maximum intensity projection (MIP) FDG-PET/CT performed at initial staging showing right axillary, bilateral cervical, mediastinal, lombo-aortic and pelvic lymph node involvement, multiple hepatic lesions, splenomegaly, humeral, vertebral, and pelvic bone marrow involvement. (b) Coronal, whole-body, grayscale inverted MIP DW-MRI performed at initial staging showing extensive disease with the same distributions as FDG-PET/CT.Click on the image to see a larger version.PET/CT检查能代替胃肠镜吗？_百度拇指医生
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?PET/CT检查能代替胃肠镜吗？
拇指医生提醒您：以下问题解答仅供参考。
由于消化道内存在较多的正常或非肿瘤因素FDG摄入，容易造成假阳性。对于消化道息肉和恶性肿瘤，倘若息肉无典型形态学表现或恶性肿瘤未侵及管壁，PET/CT非常难将二者区别开来。早期表浅的肿瘤以及部分含黏液成份较多的肿瘤因FDG摄入较少，容易呈假阴性。
故对于消化道肿瘤，与内镜相比较，PET/CT在这方面并无优势，特别在早期肿瘤的诊断方面，更多需依赖内镜。
但对于内镜暂不能到达区域，如小肠，PET/CT有十分好的效果。
消化道肿瘤分期与治疗方案选择：PET/CT有巨大的优势 PET/CT在诊断消化系统肿瘤的N分期及M分期方面有明显优势，超声、CT、MRI对淋巴腺是否转移主要是依赖于其大小，对于那些小的转移性淋巴腺无法诊断，PET则弥补了这一缺陷。
对于那些密度或信号无明显改变的远处转移，PET/CT可以非常好地显示。PET-CT浑身扫描还可以发现临床未怀疑的其他远隔脏器或组织转移。不少患者因PET-CT检查而改变了治疗方案。
PET-CT俭查结果还可以直接用于放疗定位，病灶靶区体积可以通过PET-CT提供的信息进行调整。
PETCT热文：PET/CT检查的人群和注意事项 PET CT检查恶性肿瘤原发灶 疗效及监测肿瘤复发：PET/CT优势大于肠胃镜。 1、评价疗效：大多数化道肿瘤的FDG代谢与其细胞代谢活跃程度呈正相关，因而可以根据肿瘤冶疗前后的FDG代谢变化情况来判断肿瘤的疗效，尤其是对于那些经过治疗后而肿瘤形态无明显改变者，最具有价值。
2、在复发监测方面，PETCT对于那些肿瘤标志物升高者，阳性检出率及诊断正确率相当高，特别对于那些CT与MRl难以发现或识别的肠管间及腹膜转移，有极高的诊断价值。
3、对于远处骨转移，往往在CT发现骨质破坏前几个月，PETCT上已显示出FDG高代谢。
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Rev Esp Med Nucl Imagen Mol -7
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Clinical note
FDG PET&#47;CT findings in rare sarcomas
Hallazgos de FDG PET&#47;CT en sarcomas raros
N&#46; Erg&#252;l, , M&#46; Ayd&#305;nDepartment of Nuclear Medicine&#44; Bezmialem Vak&#305;f University School of Medicine&#44; &#304;stanbul&#44; Turkey
Received 11 July 2012, Accepted 03 December 2012
AbstractThe role of FDG PET&#47;CT in management of soft tissue and bone sarcomas has been described in many studies up-to-date&#46; However&#44; contribution of PET&#47;CT to diagnosis and treatment in some types of sarcomas that are seen with low incidence has not been identified properly yet&#46; Clear cell sarcoma&#44; synovial sarcoma of chest and myxoid lyposarcoma are rare types of sarcomas&#46; We aimed to describe the FDG uptake patterns of these rare tumors and find out the role of FDG PET&#47;CT in management of disease&#46;ResumenHasta la fecha se ha descrito en muchos estudios el papel de la FDG PET&#47;TAC en el manejo de los sarcomas de tejido blando y hueso&#46; Sin embargo&#44; la contribuci&#243;n de la PET&#47;TAC al diagn&#243;stico y al tratamiento de muchos tipos de sarcomas con baja incidencia no ha sido identificada a&#250;n&#46; El sarcoma de c&#233;lulas claras&#44; el sarcoma sinovial en t&#243;rax y el liposarcoma mixoide constituyen tipos raros de sarcomas&#46; Tratamos de describir las pautas de captaci&#243;n de la FDG en estos tumores raros y de averiguar el papel de la FDG PET&#47;TAC en el manejo de la enfermedad&#46;
KeywordsClear cell sarcoma, Lyposarcoma, Synovial sarcoma, FDG PETPalabras claveSarcoma de c&#233;lulas claras, Liposarcoma, Sarcoma sinovial, FDG PET
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If the address matches an existing account you will receive an email with instructions to retrieve your usernamePET&#47;CT检查延迟显像就证明有问题吗_百度拇指医生
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?PET&#47;CT检查延迟显像就证明有问题吗
拇指医生提醒您：以下问题解答仅供参考。
不是，正常组织在PET-CT下也会显影，比如心脏、肾脏还有大脑。对于异常显影的部位也不一定就是肿瘤，炎症、囊肿也会在PET-CT下显影。
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* 由于网上问答无法全面了解具体情况，回答仅供参考，如有必要建议您及时当面咨询医生
向医生提问