对于[177Lu]Lu-PSMA响应评估使用定量RECIP 1.0的SPECT与PET
Mutaz Kassas1, Ayoub Jaafari1, Qaid Ahmed Shagera1,2
1Department of Nuclear Medicine, Institut Jules Bordet, Hôpital Universitaire de Bruxelles, Université Libre de Bruxelles, Brussels, Belgium.
概括
循环2 SPECT/CT 提供与PSMA PET/CT 实质性的协议,用于评估接受放射性药物治疗的转移性割抵抗性前列腺癌患者的治疗反应. 这种成像模式为整体存活率提供了可比的预后准确性,支持其用于早期反应评估.
科学领域:
- 核医学就是核医学.
- 在瘤学瘤学.
- 放射性药物疗法是一种放射性药物疗法.
背景情况:
- 前列腺特异性膜抗原 (PSMA) PET/CT对于监测转移性割抗性前列腺癌 (mCRPC) 放射性药物治疗 (RPT) 反应至关重要.
- 常规的PSMA PET/CT使用受到访问和成本的限制,需要评估替代成像技术.
- [177][Lu]Lu-PSMA RPT是对mCRPC的标准治疗方法,需要有效的反应监测.
研究的目的:
- 为了比较循环2的响应状态和预后意义177Lu-PSMA SPECT/CT与PSMA PET/CT在接受RPT的mCRPC患者中的反应状态和预后意义.
- 评估SPECT/CT与PET/CT相比的诊断一致性和预后准确性,以评估治疗反应.
主要方法:
- 接受Lu-PSMA RPT的102名mCRPC患者在治疗后24小时接受了SPECT/CT,在基线和两次循环后接受了PSMA PET/CT.
- 进行了视觉和定量分析,根据RECIP 1.0.0进行了病变细分和反应分类.
- 使用考克斯危险比率和卡普兰-梅尔曲线分析了无进展生存率 (PFS) 和总生存率 (OS).
主要成果:
- 循环2SPECT/CT显示与PSMA PET/CT在识别疾病进展方面存在实质性一致 (κ = 0.67),SPECT进展始终得到PET证实.
- 这两种模式都确定了与显著更短的PFS和OS相关的进展性疾病.
- 在PSMA PET/CT中,PFS的预后准确性更高 (C指数为0.66比0.57),但OS的预后准确性相似 (C指数为0.63比0.58).
结论:
- 循环2 SPECT/CT 提供了与PSMA PET/CT 的实质性协议,用于 mCRPC 的Lu-PSMA RPT 中的响应评估.
- SPECT/CT实现了可比的整体存活预后准确度,支持其用于早期治疗反应评估的实用性.
- 这些发现表明,当PET/CT访问有限时,SPECT/CT是监测Lu-PSMA RPT反应的可行替代方案.
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