用低剂量[F]FDG全身PET/CT对淋巴瘤治疗反应的评估
Clemens Mingels1,2, Kevin J Chung3, Hande Nalbant3
1Department of Radiology, University of California Davis, Sacramento, California; clemens.mingels@insel.ch.
概括
在[18F]FDG全身PET/CT中减少淋巴瘤评估的注射活性是可行的. 较低剂量维持了关键指标,如代谢性瘤体积和总损伤糖解,具有可比的治疗反应评估.
科学领域:
- 核医学就是核医学.
- 在瘤学瘤学.
- 放射化学 放射化学是指辐射化学.
背景情况:
- 全身 (TB) PET/CT提供了增强的灵敏度,使注射的放射性追踪剂活动的潜在减少成为可能.
- 在常规临床实践中,优化注射剂量对于患者安全和成本效益至关重要.
研究的目的:
- 确定使用结核病PET/CT.的淋巴瘤患者中期和治疗结束评估的注射[18F]FDG活性降低的下限.
- 评估剂量减少对定量成像参数和治疗反应评估的影响.
主要方法:
- 预期招募24名接受TB PET/CT治疗的淋巴瘤患者.
- 从注射后1个小时和2个小时获得的参考标准 (3.0 MBq/kg) 中,模拟减少了[18F]FDG活动 (1.0到0.125 MBq/kg).
- 对SUV,肝脏变化系数,代谢性瘤体积 (MTV),总损伤糖解 (TLG),瘤与背景比率 (TBRs),对比与噪声比率以及治疗响应的杜维尔标准的分析.
主要成果:
- SUVmax显示出与活动减少的增长趋势,但MTV和TLG仍然与参考标准相当.
- 随着活动的下降,肝脏变化系数显著增加,而TBRs显示微小的显著变化.
- 德奥维尔得分与参考标准保持相似,在注射后1小时降至0.25 MBq/kg,在注射后2小时降至1.0 MBq/kg.
结论:
- 注射的[18F]FDG活性可以在TB PET/CT中减少,以评估淋巴瘤治疗反应,而不会显著影响MTV,TBR或TLG.
- SUVmax和Deauville得分仍然是可靠的指标,在特定的降低剂量限制 (0.25 MBq/kg在1小时内,1.0 MBq/kg在2小时内) 内的反应.
- 这些发现支持[18F]FDG TB PET/CT在淋巴瘤管理中的剂量优化策略.
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