The findings could translate to better patient care in a stressful situation, wrote a team led by presenter Dr. Muhammad Israr Ahmad of the University of British Columbia in Vancouver.
"In a mass casualty incident, CT is an important tool for triage but can be a bottleneck to patient care," Ahmad's team wrote in the study abstract. "Improved scan efficiency allows more rapid patient throughput, helping more patients be assessed/treated."
Ahmad's group developed a shortened "disaster" whole-body CT protocol as an alternative to conventional whole-body CT. The abbreviated protocol included axial CT head, axial CT angiogram vertex to pelvis, and sagittal reformat cervical spine. Four emergency radiologists read only these images from 10 whole-body CT complex trauma exams.
The readers identified 92% of acute traumatic findings; of these, 97% were identified by staff radiologists and 87% by fellows. There were some missed findings, but they were low grade and would not necessarily require immediate treatment in a mass-casualty event.
Experience did affect the performance of readers, Ahmad and colleagues discovered: Fellows were more likely to miss findings, while false positives were more likely among staff radiologists.
Yes, an abbreviated whole-body CT protocol may miss some low-grade conditions, but in a mass-casualty event, it appears to be an effective way to streamline imaging, the team concluded.
"Use of an abbreviated whole body trauma CT protocol in a mass casualty incident can expedite imaging without missing those injuries that require immediate treatment," Ahmed and colleagues wrote.