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Rib fractures at postmortem computed tomography (PMCT) validated against the autopsy
Claudia Schulze1, Hanno Hoppe, Wolf Schweitzer
1Institute of Forensic Medicine, University of Zürich, Winterthurerstrasse 190/52, CH-8057 Zürich, Switzerland.
Forensic Science International
|December 10, 2013
Summary
Postmortem CT (PMCT) shows limited sensitivity for detecting rib fractures compared to autopsy, though it excels at identifying partial fractures. This suggests potential false negatives in both PMCT and autopsy for certain fracture types.
Area of Science:
- Forensic Radiology
- Medical Imaging
- Anatomical Pathology
Background:
- Rib fractures are common in forensic investigations.
- Autopsy is the gold standard for fracture detection, but can miss subtle injuries.
- Postmortem computed tomography (PMCT) offers a non-invasive imaging alternative.
Purpose of the Study:
- To assess the sensitivity and specificity of PMCT for detecting rib fractures.
- To compare PMCT findings with autopsy results in forensic cases.
- To evaluate PMCT's accuracy for different fracture types and locations.
Main Methods:
- 51 forensic cases underwent pre-autopsy PMCT.
- Two readers (radiologist, forensic pathologist) analyzed high-resolution CT data for rib fractures.
- Sensitivity, specificity, and correct recognition rates (CRR) were calculated.
- Autopsy was used as the validation standard.
Main Results:
- Autopsy detected 690 fractures; PMCT detected 491 (radiologist) and 559 (pathologist).
- Overall PMCT sensitivity was 0.63 (specificity 0.97).
- Lower sensitivity was noted for antero-lateral fractures; PMCT better detected partial fractures than autopsy.
Conclusions:
- PMCT demonstrates limited sensitivity for overall rib fracture detection when validated against autopsy.
- Clinical CT may also have false negatives for rib fractures.
- PMCT is more effective than autopsy for identifying partial rib fractures.
