FDG PET/CT在确定性和推定性自身免疫性脑炎中的作用
Simran Kalra1, Madhavi Tripathi1, Manjari Tripathi2
1Department of Nuclear Medicine, AIIMS.
Nuclear medicine communications
|November 20, 2023
概括
在诊断自身免疫性脑炎 (AIE) 时,F-18氧葡萄糖PET/CT (FDG-PET) 的灵敏度高于MRI. 在早期AIE诊断和治疗启动中,FDG-PET的特殊代谢模式有助于治疗.
科学领域:
- 神经学 神经学
- 核医学就是核医学.
- 放射学 放射学是一门学科.
背景情况:
- 自免疫性脑炎 (AIE) 的诊断可能具有挑战性.
- 磁共振成像 (MRI) 是一种标准的诊断工具,但其灵敏度有限.
- F-18氧葡萄糖正子发射断层扫描/计算机断层扫描 (FDG-PET) 是用于AIE评估的新兴成像方式.
研究的目的:
- 为了评估FDG-PET的诊断性能与MRI相比,在临床诊断为AIE的患者中.
- 在FDG-PET上确定与AIE相关的特定代谢模式.
- 评估FDG-PET在支持早期AIE诊断方面的实用性.
主要方法:
- 对52名临床诊断为AIE的患者进行前性研究.
- 所有患者都接受了FDG-PET成像.
- 在可行的情况下,进行了MRI,脑脊液 (CSF) 分析和脑电图 (EEG).
- 用FDG-PET图像进行视觉解释,并使用统计参数映射 (SPM).
主要成果:
- 对于AIE诊断,FDG-PET的整体灵敏度为86% (45/52).
- 在只有42% (22/52) 的病例中检测到MRI异常.
- 在76% (23/30) 的MRI阴性病例中,FDG-PET呈阳性.
- 观察到特定的新陈代谢模式,包括基底高新陈代谢和周围/月间低新陈代谢.
- 在两名抗体阳性,患有抗NMDAR脑炎的患者中发现了卵巢瘤.
结论:
- 在诊断抗体阳性和抗体阴性AIE时,FDG-PET表现出比MRI更高的灵敏度.
- 在FDG-PET上显著的代谢模式可以促进早期诊断AIE.
- 通过FDG-PET及时诊断可以迅速启动AIE的治疗.
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