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在Ga68-PSMA PET/CT上的生理生物分布以及影响生物分布的因素

Ayça Arçay Öztürk¹, Metin Erkılıç², Gonca Gül Bural²

¹Nuclear Medicine Department, Faculty of Medicine, Akdeniz University, Antalya, Turkey. arcayayca@gmail.com.

Annals of nuclear medicine

|July 9, 2024

概括

-68 PSMA-617 在前列腺癌中PET/CT成像显示与其他PSMA配体相似的生物分布. 治疗和患者因素可以影响吸收,但淋巴结和骨吸收保持一致.

科学领域:

核医学是一种核医学.
放射性药物成像技术放射性药物成像技术
前列腺癌的诊断方法前列腺癌的诊断方法

背景情况:

前列腺特异性膜抗原 (PSMA) 配体对于前列腺癌成像至关重要.
了解-68 PSMA-617 (Ga68-PSMA-617) 的生物分布对于准确的解释至关重要.
影响放射性药物吸收的因素需要调查,以优化诊断准确性.

研究的目的:

确定Ga68的生理和病理生理分布-PSMA-617.
调查实验室,遗传学和临床发现如何影响Ga68-PSMA-617的分布和图像评估.
建立切断值,以区分前列腺,骨和淋巴结中的生理和病理吸收.

主要方法:

对229名前列腺癌患者进行了Ga68-PSMA PET/CT的回顾性分析.
根据PET/CT结果,格里森得分,PSA水平,治疗史和转移状态对患者进行分组.
在患者子组中对器官,组织和病变的标准化摄入值 (SUV) 的比较.

主要成果:

患者组之间没有观察到生理淋巴结和骨吸收的显著差异.
安卓素剥夺疗法 (ADT) 与较高的骨转移SUV和下下腺/脏皮层SUV相关.
放射治疗与更高的前列腺正常组织SUV有关. 高LDH水平显示下下腺,肌肉,肝脏和血液池中的SUV较低.
已确定的SUVmax截止值:原发性前列腺病变为6.945,淋巴结转移为4.72,骨转移为4.25.
血清PSA截止值为1.505个差异化负/正组,敏感度为79.7%,特异性为77.3%.

结论:

Ga68-PSMA-617表现出与其他PSMA配体相似的生物分布模式.
淋巴结和骨的生理吸收通常不受研究因素的影响.
放射治疗可以增加正常的前列腺组织吸收;ADT,瘤负担和功能可能会由于PSMA表达变化而改变器官吸收.

关键词:

在PSMA PET中,在PSMA-61717中使用.前列腺癌是什么意思前列腺癌是什么意思前列腺特异性膜抗原.

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