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Analysis of postmortem changes in internal organs and gases using computed tomography data.

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Postmortem CT scans reveal changes in lung and gas volumes. Intrahepatic gas volume decreases, while intrarectal gas volume increases, aiding in postmortem interval estimation.

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Area of Science:

  • Forensic Radiology
  • Forensic Pathology
  • Medical Imaging

Background:

  • Postmortem computed tomography (PMCT) is a valuable tool for determining causes of death and quantifying internal organ and gas volumes.
  • Understanding postmortem changes is crucial for accurately estimating the postmortem interval (PMI).

Purpose of the Study:

  • To investigate postmortem changes in organ and gas volumes using PMCT.
  • To establish relationships between measured volumes and the postmortem interval (PMI).

Main Methods:

  • Forty-six cadavers underwent pre-autopsy CT scans.
  • Volumes of lungs, intrahepatic gas, and intrarectal gas were measured using CT workstation.
  • Stepwise regression analysis was employed to develop predictive equations for volume estimation and PMI determination.

Main Results:

  • Predictive equations incorporated factors like height, body surface area (BSA), sex, and PMI.
  • Intrahepatic gas volume showed a decrease with postmortem changes.
  • Intrarectal gas volume demonstrated an increase with postmortem changes.

Conclusions:

  • PMCT measurements of lung and gas volumes provide insights into postmortem changes.
  • The observed changes in intrahepatic and intrarectal gas volumes may assist in PMI estimation.
  • Further research including other intestinal segments is recommended to refine PMI analysis.