骨髓的特定吸收导致红髓的高吸收剂量在[
Jens Hemmingsson1, Johanna Svensson2,3, Andreas Hallqvist2,3
1Department of Medical Radiation Sciences, Institute of Clinical Sciences, Sahlgrenska Academy, Gothenburg, Sweden; jens.hemmingsson@gu.se.
概括
在神经内分泌瘤患者中,红髓中-177DOTATATE的特定吸收发生,导致吸收剂量高于标准方法预测的水平. 这凸显了需要精确的红髓剂量测量来管理治疗副作用的必要性.
科学领域:
- 核医学就是核医学.
- 放射性药理学 是一种放射性药理学.
- 医学物理 医学物理
背景情况:
- 骨髓抑制是治疗神经内分泌瘤的[177Lu]Lu-DOTATATE治疗的常见副作用.
- 神经内分泌瘤和CD34阳性的造血原生细胞共享体静止素受体2型表达,可能导致红髓中[177Lu]Lu-DOTATATE的吸收.
- 准确的剂量测量对于了解和减轻与治疗相关的毒性至关重要.
研究的目的:
- 为了识别和量化红髓中的特定[177Lu]Lu-DOTATATE吸收.
- 为了确定接受[177Lu]Lu-DOTATATE治疗的患者红髓吸收的辐射剂量.
- 为了比较红髓剂量测量使用一个隔间模型与标准的基于血液的方法.
主要方法:
- 十七名用[177Lu]Lu-DOTATATE治疗的神经内分泌瘤的患者在治疗后接受了连续的SPECT/CT成像.
- 活动度量化在脊椎 (T9-L5) 和关节骨中,代表红髓部位.
- 一个使用下降大动脉活动作为输入的隔间模型,将特定的红髓吸收与基于血液的剂量计贡献区分开来.
主要成果:
- 所有患者的脊椎和关节骨中[177Lu]Lu-DOTATATE吸收增加,与大动脉度相比.
- 红髓的特异性吸收平均比非特异性吸收高49%,具有显著的变化 (0% - 93%).
- 红髓中吸收的中位数剂量为0.056 Gy/GBq (脊椎) 和0.043 Gy/GBq (部骨),骨转移患者的剂量更高.
结论:
- 红髓中[177Lu]Lu-DOTATATE的特定摄取与血液生成前体细胞上的体静止素受体表达相关.
- 基于血液的标准剂量测量方法低估了红髓吸收的剂量,这是由于未解决的长期特定吸收.
- 精确的红髓剂量测量对于优化[177Lu]Lu-DOTATATE治疗和管理潜在的血液毒性至关重要.
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