Postmortem Computed Tomography Is a Reliable, Reproducible, and Accurate Method in Measuring Body Length

Area of Science:

• Forensic Radiology
• Medical Imaging
• Anatomical Measurement

Background:

• Traditional postmortem body length measurement is prone to human error and lacks reproducibility.
• Postmortem computed tomography (PMCT) provides a permanent, reviewable radiological record of body dimensions.
• Existing literature supports PMCT for estimating body and organ weights, but not body length.

Purpose of the Study:

• To evaluate the accuracy and reliability of PMCT for measuring body length compared to traditional postmortem methods.
• To assess intrarater and interrater reliability of PMCT-based body length measurements.
• To determine the clinical significance of any discrepancies between PMCT and traditional measurements.

Main Methods:

• Retrospective analysis of 50 consecutive adult postmortem computed tomography (PMCT) scans.
• Comparison of body length measurements obtained via PMCT with traditional postmortem examination measurements.
• Statistical analysis including Pearson correlation coefficient and interclass correlation to assess reliability and agreement.

Main Results:

• PMCT measurements demonstrated high intrarater and interrater reliability (>0.99, P < 0.01).
• PMCT-derived body lengths were consistently shorter than traditional measurements (mean difference -1.2 cm), but this was clinically insignificant.
• Strong correlation was observed between PMCT and traditional measurements (Pearson correlation coefficient and interclass correlation >0.97, P < 0.01).

Conclusions:

• Postmortem computed tomography (PMCT) is a reliable, reproducible, and accurate method for measuring body length.
• PMCT offers a valuable alternative to traditional methods, enhancing data integrity and reviewability in postmortem analysis.
• Careful positioning of the body in the body bag is necessary for optimal scanning and accurate measurements.