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Postmortem changes in the eye on computed tomography images.

Motoo Yoshimiya1, Shogo Shimbashi1, Hideki Hyodoh1

  • 1Department of Forensic Medicine, University of Fukui School of Medical Sciences, Japan.

Legal Medicine (Tokyo, Japan)
|June 27, 2024
PubMed
Summary
This summary is machine-generated.

Postmortem computed tomography (PMCT) eye changes, including vitreous volume decrease and lens dislocation, can help estimate time since death. These ocular findings provide valuable forensic insights.

Keywords:
Postmortem imagingPostmortem intervalVitreous volume

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Area of Science:

  • Forensic Radiology
  • Postmortem Imaging Analysis

Background:

  • Ocular tension and eye integrity decrease with postmortem interval (PMI).
  • Time-related changes in postmortem computed tomography (PMCT) of the eye are not well-defined.

Purpose of the Study:

  • To quantitatively assess vitreous volume and CT values in postmortem eyes.
  • To clarify time-dependent alterations in PMCT findings.

Main Methods:

  • Retrospective analysis of PMCT images from 131 eyes (66 patients).
  • Eyes categorized into four PMI groups (<1 day, 1-2 days, 3-6 days, ≥7 days).
  • Measurement of vitreous volume, CT values, and observation of intraocular gas and lens dislocation.

Main Results:

  • Significant vitreous cavity volume reduction observed from 3-6 days PMI onwards.
  • Intraocular gas presence noted in eyes ≥7 days PMI.
  • Lens dislocation initiated at 3-6 days PMI, increasing with PMI and higher environmental temperatures.

Conclusions:

  • Postmortem computed tomography (PMCT) ocular findings are valuable for estimating time since death.
  • Vitreous cavity volume changes and lens dislocation are key indicators.