MDCT indicated that all of the drowning victims had fluid in the paranasal sinuses and ears and ground-glass opacity in the lungs. Twenty-six (93 percent) had fluid in the subglottic (below the vocal cords) trachea and main bronchi. Fourteen (50 percent) had sediment in the subglottic airways. Six (21 percent) had frothy fluid in the airways, and 25 (89 percent) had ground-glass opacity and thickening in the lungs. Twenty-five (89 percent) exhibited swelling of the stomach.
No members of the control group had frothy fluid or sediment in the airways or sinuses, 11 (92 percent) had subglottic airway, tracheal and bronchial fluid. All members of the control group exhibited collapsed stomachs.
Autopsy results in these categories were similar to MDCT results for both study groups.
"Airway froth and sediment can be demonstrated on MDCT and were specific to drowning, thereby replicating the findings seen at autopsy," said Dr. Levy.
Based on this study, MDCT may provide support for the diagnosis of drowning when other causes of death have been excluded by a limited autopsy or external examination of the body. In addition, MDCT virtual autopsy may be useful as a pre-autopsy triage tool in mass casualty scenarios.
"More and more, advanced imaging tools such as MDCT are being applied to forensic investigations," Dr. Levy said. "In the future, imaging in forensics may be just as important as imaging in clinical medicine."
Source:Radiological Society of North America