定量177Lu-DOTATATE SPECT/CT可预测中肠神经内分泌瘤6个月PRRT形态反应:一个试点研究
Iness Megherbi1, Christopher Hoog2, Marine Perrier3
1Médecine Nucléaire, Institut Godinot, Reims, France.
EJNMMI research
|May 6, 2025
概括
使用SUVmax周期间变化的定量治疗后光学 (PTS) 可以预测接受177Lu-DOTATATE的小肠神经内分泌瘤 (siNET) 患者的治疗反应. 这种早期评估有助于预测6个月后的RECIST结果.
科学领域:
- 核医学就是核医学.
- 在瘤学瘤学.
- 放射性药理学 是一种放射性药理学.
背景情况:
- 用177Lu-DOTATATE进行受体放射性核素治疗 (PRRT) 是晚期小肠神经内分泌瘤 (siNET) 的关键治疗方法.
- 治疗反应通常在治疗后几个月使用RECIST标准进行评估.
- 由于缺乏量化,使用治疗后光学图 (PTS) 进行早期反应评估是有争议的.
研究的目的:
- 评估定量PTS的预测值,特别是177Lu-DOTATATE治疗的第一个 (C1) 和第二个 (C2) 周期之间的标准化摄入值 (SUVmax) 的变化.
- 为了将定量PTS发现与siNET患者的6个月RECIST反应相关联.
主要方法:
- 包括12名连续转移性siNET患者接受177Lu-DOTATATE治疗.
- 在C1和C2.2的PTS SPECT/CT上测量了最高吸收病变的SUVmax.
- 计算了∆SUVmax并使用线性回归分析了其与6个月RECIST的相关性.
主要成果:
- 在∆SUVmax和6个月RECIST百分比 (p < 0.001) 之间发现了强烈的相关性.
- 回归公式: 6个月的RECIST = -0.05 + 0.36 x ∆SUVmax.
- 代谢性瘤体积 (∆MTV) 的变化不能预测治疗反应.
结论:
- 定量PTS,特别是∆SUVmax,显著预测了与177Lu-DOTATATE治疗的siNET患者的6个月RECIST反应.
- 定量成像可以在C2的早期预测治疗反应.
- 需要在更大的患者队伍中进一步验证.
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