人体脑体积测量:MRI测量的验证
Amy Gérin-Lajoie1, Walter Adame-Gonzalez2,3, Eve-Marie Frigon1
1Department of Anatomy, Université du Québec à Trois-Rivières, Trois-Rivières, Québec, Canada.
Magnetic resonance in medicine
|September 12, 2025
概括
这项研究使用ex vivo标本和水位移验证了MRI大脑体积. 自动T1加权的MRI细分显示了与黄金标准相当的准确性,这表明临床MRI大脑体积是可靠的.
科学领域:
- 神经成像是一种神经成像.
- 医学物理 医学物理
- 人体解剖学 解剖学 解剖学
背景情况:
- 准确的人类大脑体积测量对于临床研究至关重要.
- 目前的体内MRI体积测量工具缺乏与黄金标准的验证.
- 外体内验证为评估MRI准确性提供了一个独特的机会.
研究的目的:
- 在体内验证MRI脑体积测量,使用ex vivo,in situ标本.
- 为了将MRI衍生的体积与黄金标准水位移法 (WDM) 进行比较.
- 评估不同MRI序列和细分技术的准确性.
主要方法:
- 获得了7个固定解剖头部的3T MRI扫描 (T2加权,T1加权,MP2RAGE).
- 使用手动值和深度学习 (SynthSeg) 分段灰色和白色物质.
- 在固定和剖析后使用WDM测量提取的大脑体积.
主要成果:
- 与WDM相比,所有测试的MRI体积测量方法都显示出显著的差异 (p < 0.001).
- 自动T1加权MRI细分 (SynthSeg) 是唯一与WDM没有显著差异的方法.
- 平均体积范围从1020.29厘米3 (手动T2) 到1156.18厘米3 (自动MP2RAGE-2nd反转).
结论:
- SynthSeg提供了精确的脑体积测量在体外,在现场T1加权MRI.
- 临床MRI脑体积对于大多数研究来说可能足够准确.
- 潜在的低估体内大脑体积可能会发生,这取决于使用的MRI序列.
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