可以从治疗前的SSTR PET预测Lu-DOTATATE脏吸收的剂量吗? 来自多中心数据的发现
Azadeh Akhavanallaf1, Zhonglin Lu2, Avery B Peterson1
1Department of Radiology, University of Michigan Medical Center, Ann Arbor, Michigan.
概括
索马托斯塔丁受体 (SSTR) PET成像可以预测神经内分泌瘤的Lu-DOTATATE治疗中脏吸收的剂量. 虽然相关性很小,但预测模型显示了可接受准确度的个性化治疗计划的潜力.
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.
- 医疗成像医学成像
背景情况:
- -DOTATATE疗法用于神经内分泌瘤,需要通过PET成像确认瘤体静止素受体 (SSTR) 表达.
- 通过预测至关重要的器官,特别是脏的吸收剂量,SSTR PET成像有可能个性化治疗.
- 验证SSTR PET对脏吸收剂量的预测能力对于优化Lu-DOTATATE治疗至关重要.
研究的目的:
- 验证SSTR PET在预测Lu-DOTATATE治疗第一个周期中脏吸收剂量的预测能力.
- 分析多中心数据集,从更广泛的患者群体中获得有关SSTR PET预测准确性的见解.
- 为了评估治疗前SSTR PET脏吸收量与Lu-DOTATATE吸收剂量之间的相关性.
主要方法:
- 来自5个国际中心 (加拿大,挪威,瑞典,美国) 的数据的回顾性分析,分别涉及25,75,18,36和26名患者.
- 治疗前的SSTR PET/CT成像和1 177循环后的基于Lu成像的剂量测量根据特定地点的协议进行.
- 使用基线SSTR PET脏吸收的混合效应模型被开发用于预测脏吸收的剂量,用于外部和内部验证的离开一个中心和离开一个样本的交叉验证.
主要成果:
- 在脏SSTR PET摄入量和Lu-DOTATATE在各中心吸收剂量之间观察到统计学上显著的相关性 (P <0.05) (R2范围:0.14-0.53).
- 综合混合效应模型实现了0.25的R2 (P <0.01),平均绝对误差为0.15 Gy/GBq (外部) 和0.12 Gy/GBq (内部) 验证.
- 平均相对绝对误差为28% (外部) 和22% (内部) 验证,表明适度但显著的预测能力,有显著的中心间差异.
结论:
- 在多中心环境中,SSTR PET的脏吸收显示出与Lu-DOTATATE在脏中吸收的剂量具有统计学上显著但适度的相关性.
- 开发的预测模型显示平均相对绝对误差为28%或更低,支持其对个性化剂量测量的潜力.
- 显著的中心间差异凸显了对标准化成像协议和剂量计工作流程的需要,以提高预测准确性和治疗一致性.
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