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较低的加多剂量对脑膜瘤的核磁共振成像进行比较评估:我们可以走多低?

Tshea Dowers¹, Ali Helmi¹, Achire N Mbanwi¹

¹From the Department of Medical Imaging, University of Toronto, Toronto, Ontario, Canada.

AJNR. American journal of neuroradiology

|June 10, 2024

概括

将阴道瘤MRI的加多剂量降低到62%可以保持诊断质量. 低于这个水平的剂量显著损害瘤分化,使其不适合临床使用.

科学领域:

神经辐射学神经辐射学
瘤成像学成像学
医学成像对比剂医学成像对比剂对比剂

背景情况:

基于加多的对比剂 (GBCA) 是用于脑膜瘤成像的标准.
由于对GBCA副作用,成本和环境影响的担忧,需要采取剂量减少策略.
脑膜瘤通常在标准剂量时表现出强烈的增强,这表明可能需要更低剂量.

研究的目的:

评估降低加多剂量对区分脑膜瘤与相邻的内组织的影响.
为了确定足够的脑膜瘤可视化所需的最小有效的加多剂量.
为了评估降剂量降低在脑膜瘤的可行性.MRI.

主要方法:

108名患有脑膜瘤的患者接受了脑部MRI,使用不同的加多剂量 (微:~25%,低:~62%,标准).
用了定性视觉评估和定量信号差异计算来区分瘤与组织.
统计分析包括ANOVA,麦克纳马测试和非劣等性测试.

主要成果:

较低的加多剂量 (低和微) 显著降低了脑膜瘤和脑组织之间的信号差异 (P < .02).
低剂量 (62%) 对视觉差异化标准剂量没有劣势.
微剂量 (25%) 导致从皮层 (P=.041) 和鼻 (P<.001) 显著更高的亚最佳分化率.

结论:

低于标准水平的62%的加多剂量足以充分划分脑膜瘤.
将剂量进一步降低至25%会损害瘤的可见性,因此不建议.
低剂量的GBCA可能为脑膜瘤成像提供一个可行的替代方案,平衡有效性和安全性.

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