死后定量磁共振成像的温度校正,使用实时额头温度采集
Celine Berger1, Melanie Bauer1, Eva Scheurer1
1Institute of Forensic Medicine, Department of Biomedical Engineering, University of Basel, Basel, Switzerland; Institute of Forensic Medicine, Health Department Basel-Stadt, Basel, Switzerland.
Forensic science international
|June 1, 2023
概括
死后的大脑MRI需要进行温度调整. 这项研究开发了一种实时的非侵入性方法,使用额头温度来调整MRI参数,从而使已故大脑组织的定量分析得以一致.
科学领域:
- 医疗成像医学成像
- 法医科学 法医科学 法医科学
- 神经科学是一个神经科学.
背景情况:
- 已故个体的磁共振成像 (MRI) 由于与活体相比,温度变化带来了挑战.
- 在死后大脑中进行准确的定量MRI分析需要温度校正方法.
- 在现场死后的MRI需要非侵入性技术来调节温度.
研究的目的:
- 研究死后病例中对脑MRI参数进行实时,非侵入性温度校正的可行性.
- 为了建立前额温度和死亡大脑中的定量MRI参数之间的相关性.
- 开发一种温度校正方法,适用于 in situ 死后脑部MRI扫描.
主要方法:
- 包括17个死后病例进行实地脑部MRI.
- 在MRI采集期间持续测量额头温度 (扩散张力成像,多对比旋转回声,多回声梯度回声,反转恢复旋转回声).
- 将线性模型与白质,大脑皮质和深灰质的定量MRI参数 (T2,平均扩散率,T1) 相匹配,以确定温度灵敏度.
主要成果:
- 统计学上显著的温度灵敏度确定为T2和白质中的平均扩散度.
- 在大脑皮层中观察到T1的显著温度敏感性.
- 在深灰质中发现了T1的显著温度敏感性和平均扩散性.
结论:
- 线性模型被成功计算为温度纠正特定的MRI参数在死后脑部扫描.
- 开发的方法允许对定量MRI参数进行温度独立的比较.
- 这种实时,非侵入性温度校正是定量在位死后MRI的关键进步.
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