定量SSTR-PET/CT:在神经内分泌瘤患者中预测everolimus反应的潜在工具
Homeira Karim1, Michael Winkelmann1, Freba Grawe2
1Department of Radiology, University Hospital, LMU Munich, Munich, Germany.
Radiology and oncology
|June 11, 2024
概括
定量Ga-DOTA-TATE PET/CT比率可以预测神经内分泌瘤 (NET) 患者的恒素反应. 瘤与肝脏 (T/L) 比率,特别是Tmean/Lmax,是无进展生存期 (PFS) 的有希望的预后标志物.
科学领域:
- 核医学就是核医学.
- 在瘤学瘤学.
- 无线电学 (Radiomics) 是一种无线电学.
背景情况:
- 带有肝转移的神经内分泌瘤 (NET) 需要有效的监测策略.
- 埃弗罗利莫斯是NET的治疗选择,但预测反应可能具有挑战性.
- 68Ga-DOTA-TATE PET/CT提供了定量成像能力.
研究的目的:
- 评估Ga-DOTA-TATE PET/CT参数的定量评估,以监测和预测NELM患者的恒素反应.
- 确定与无进展生存 (PFS) 相关的成像生物标志物.
- 为了比较定量成像比率与基于尺寸的标准的有效性.
主要方法:
- 对29名NELM患者进行了回顾性分析,其中62名患者患有目标病变.
- 在治疗前和治疗后获得的Ga-DOTA-TATE PET/CT扫描.
- 计算标准化吸收值 (SUV) 比率,包括瘤与肝脏 (T/L) 和瘤与脏 (T/S) 的比率.
- 无进展生存期 (PFS) 分为响应者 (PFS>6个月) 和不响应者 (PFS ≤6个月).
主要成果:
- 与非响应者相比,响应者显示Tmax/Lmax和Tmean/Lmax比率显著下降 (p=0.01).
- 单变Cox回归中PFS的唯一独立预后参数是Tmean/Lmax比 (HR0.5,p=0.03).
- T/L和T/S比率的百分比变化显著预测了PFS,其中Tmean/Lmax变化显示了最高的AUC (0.73). 一个<2.5%的最佳值预测了更长的PFS (p=0.003).
结论:
- 定量SSTR-PET/CT参数,特别是肝转移与肝膜瘤的比率,显示出在NET患者中预测和监测everolimus反应的潜力.
- 在这种患者群体中,Tmean/Lmax比率可以作为PFS的预后标记.
- 肝转移与肝膜瘤的比率超过了响应评估的基于大小的标准.
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