简介:Positronemissiontomography(PET)isapowerfulnoninvasiveimagingtoolforphenotypingpatientsatriskoforwithknowncoronaryarterydisease(CAD).Oneofthekeyadvantagesoverotherimagingmodalitiesisitsuniqueabilitytoquantifyphysiologicprocesses,includingmyocardialbloodflow(inmillilitersperminutepergramofmyocardium),metabolism,andcardiacreceptors,anditshighsensitivityfordelineatingandquantifyingmoleculartargetsinvivousingtargetedimagingprobes.CardiacPET/CToffersopportunityforacomprehensivenoninvasiveevaluationoftheconsequencesofatherosclerosisinthecoronaryarteriesandthemyocardium.
简介:摘要目的探讨肺小细胞癌、腺癌、鳞癌的PET-CT表现特征。方法回顾性分析经病理证实的肺小细胞癌、腺癌、鳞癌PET-CT表现,包括原发病灶位置、大小、l8F-FDGPET/CT的标准化摄取值(SUV),以及淋巴结转移、骨转移、远处脏器转移情况。结果肺小细胞癌、腺癌、鳞癌35例小细胞癌、60例腺癌、55例鳞癌的肺原发病灶的l8F-FDGPET/CT的标准化摄取值(SUV),经?检验发现三者的SUV值差异有?统计学意义(χ2=0.417,P=0.812?)。除SUV值外,将三者的淋巴结转移、骨转移、远处脏器转移以及临床分期情况进行比较,发现小细胞癌、非小细胞肺癌各种征象差异均?有统计学意义(P<0.05)。以上三者的临床分期经?比较,有差异?。结论肺小细胞癌、腺癌、鳞癌PET-CT表现特征相似,SUVmax有意义?,在获得病理诊断之前影像学上无法鉴别。??
简介:AbstractThe aim of this paper is to discuss the risk of recurrence in patients with differentiated thyroid cancer and emphasize the importance of risk-group stratification, early recurrence identification and application of new imaging modalities, what is the PET-CT. Moreover, follow-up of patients with thyroid carcinoma should be carried out by specialized teams throughout life. Therefore, interdisciplinary case discussions in tumor conferences may improve the use of multimodal therapy especially in patients with poorly differentiated thyroid carcinomas. After baseline follow-up, if there is a suspicion of thyroid carcinoma, early PET-CT should be used for early detection and appropriate planning. Fortunately, due to the good localization possibility, the PET-CT enables a focused surgical procedure with avoidance of an unnecessary tumor search and thereby a reduction of the risk of injury of neighboring structures which is a concern with reoperative neck surgery.
简介:【摘要】 目的 探究PET/CT受检者有效剂量辐射分析。方法 选取2019年1月~2020年12月期间PET/CT受检者80例作为本次研究对象,采取剂量长度乘积估算扫描辐射有效剂量,并计算受检者所受辐射总有效剂量。结果 PET/CT管电压120KV,管电流60~180mAs调整,伴随着管电流增大,EDTotal、EDCT/EDPET比值逐渐增大;受检者自身一般情况不同所注射18F-FDG药物不同,计算PEF所致辐射有效剂量,随着18F-FDG一定范围不断增大,EDPET、EDCT/EDPET随之增大,但不超过50%。结论 CT扫描所致辐射有效剂量占据总有效剂量一般以上,降低管电流,调整18F-FDG剂量,则有效降低PET/CT受检者有效辐射剂量。