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从死后CT估计肝脏放射学:开发用于死后间隔估计的可解释模型.

Fabio De-Giorgio1, Davide Cusumano2, Luca Vellini2

  • 1Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy; Department of Healthcare Surveillance and Bioethics, Section of Legal Medicine, Università Cattolica del Sacro Cuore, Rome, Italy.

Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB)
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从死后CT扫描中发现的肝脏斜率可以帮助估计自死亡以来的时间. 这种放射性特征可靠地识别24小时以上发生的死亡,有助于法医调查.

关键词:
计算机断层扫描 (CT) 是一种计算机断层扫描.验尸后的时间间隔.无线电学 (Radiomics) 是一种无线电学.

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科学领域:

  • 法医放射学 法医放射学
  • 医学成像分析 医学成像分析
  • 无线电学 (Radiomics) 是一种无线电学.

背景情况:

  • 尸检后计算机断层扫描 (PMCT) 是法医调查中一个有价值的非侵入性工具.
  • 估计死后间隔 (PMI) 对于确定自死亡以来的时间至关重要.
  • 对PMCT扫描的放射性分析为PMI估计提供了客观数据.

研究的目的:

  • 开发和验证使用PMCT扫描中的肝脏特征的放射性模型.
  • 要区分发生在24小时内和24小时后的死亡.
  • 为了确定强大的放射性生物标志物用于死后间隔估计.

主要方法:

  • 173个PMCT扫描用于模型开发和80个用于外部验证的追溯分析.
  • 手动肝脏细分和提取40个统计,形态和碎形放射性特征.
  • 后勤回归建模和ROC曲线分析,以评估PMI估计的特征性能.

主要成果:

  • 肝脏曲是最具预测性和强大的放射性特征 (p=9.13×10−4,ICC=0.75).
  • 一个基于肝脏骨的模型实现了0.75的AUC和24小时以上死亡的100%特异性.
  • 外部验证证实了斜率模型的特异性.

结论:

  • 从PMCT提取的肝脏骨是确定24小时以后死亡的有希望的生物标志物.
  • 该模型在独立的队列中展示了可靠的性能.
  • 对PMCT肝脏图像的放射性分析可以增强法医PMI的确定.