飞行时间PET/CT成像Ga-68-Dotatate:正常模式,SUV量化,以及与非飞行时间成像的差异
Matthew Clifton Miller1, Avani T Bansal2, Daniel Wingard3
1School of Medicine, Uniformed Services University of the Health Sciences, Bethesda, Maryland, United States.
较新的飞行时间 (TOF) PET/CT摄像机显示高-68-多达SUVmax值比较老的非TOF系统. 这项研究建立了一个正常的TOF SUVmax数据库,用于客观检测异常.
科学领域:
- 核医学是一种核医学.
- 放射性药理学 是一种放射性药理学.
- 医学成像技术 医学成像技术
背景情况:
- 建立了使用非飞行时间 (非TOF) PET/CT 的-68-酸盐 (Ga-68-酸盐) 的标准化吸收值 (SUV).
- 新的,高度敏感的TOF PET/CT摄像头正在取代旧的系统,可能会改变SUVmax测量.
研究的目的:
- 为常见结构建立一个正常的Ga-68-dotatate TOF SUVmax数据库.
- 为了帮助客观的视觉检测异常.
- 为了比较TOF和非TOF算法之间的SUVmax值.
主要方法:
- 五十名疑似神经内分泌瘤的患者在能够进行TOF和非TOF重建的PET-CT摄像头上进行了Ga-68-dotatate扫描.
- 感兴趣的区域 (ROI) 围绕24个正常结构和异常病变绘制.
- 用TOF和非TOF算法进行比较,为每个ROI测量SUVmax.
主要成果:
- 非TOF摄入量与之前的研究一致.
- TOF图像提供了更好的视觉目标与背景比率.
- 与非TOF相比,TOF SUVmax在大多数结构中较高,特别是上腺和未经烧结的胰腺的两倍以上,在异常病变中高出1.8倍.
结论:
- 为客观异常检测提供了一个正常的Ga-68-dotatate TOF SUVmax数据库.
- TOF SUVmax测量通常高于非TOF,异常病变显示大约1.8倍以上的值.
- 这些发现对于在不同PET/CT技术中比较患者扫描至关重要.
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