用F-Flurpiridaz进行即时背对背休息压力PET扫描的技术评估18
Dan J Kadrmas1, Brad J Kemp2, Arkadiusz Sitek3
1MultiFunctional Imaging LLC, South Ogden, UT.
概括
与18F-flurpiridaz进行立即背靠背的休息/压力心肌输液成像是可行的. 准确纠正残余活性是最大限度地减少偏差和确保可靠的心肌血流评估的关键.
科学领域:
- 核心脏病学 核心脏病学
- 放射性药物成像技术 放射性药物成像技术
背景情况:
- 18F-flurpiridaz是一种新的PET标记剂,用于心肌缺血和心脏病发作.
- 它的半衰期为110分钟,允许区域生产,但会导致当天扫描的剩余活动问题.
- 这项研究评估了立即的背靠背休息/压力成像与残余活动校正.
研究的目的:
- 在技术上评估立即背靠背的休息/应力18F-flurpiridaz PET.
- 评估商业软件在纠正残余活动方面的有效性.
- 立即确定当天休息/压力成像是否可行.
主要方法:
- 追溯分析11名受试者的动态休息和压力18F-flurpiridazPET扫描.
- 数字转换和组合来模拟一个15分钟的背对背协议.
- 使用mfiVerseTM软件对心肌血流 (MBF) 和像素值的残留痕迹效应的建模.
主要成果:
- 与参考扫描相比,残留活动导致显著偏差 (+31%在像素值中,+64%在MBF中)
- 校正将偏差降低到<1%,校正值与参考扫描密切匹配 (r=0.998用于像素值,r=0.994用于MBF).
- 总结压力评分在经过校正后显著改善.
结论:
- 立即背靠背的休息/压力18F-flurpiridaz PET在技术上是可行的.
- 准确的对残余活性进行校正对于可靠的结果至关重要.
- 这种方法可以有效地评估心肌输液,而不需要休息压力延迟.
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