Whole-body computed tomography has become a central tool in early trauma assessment, offering rapid head-to-pelvis imaging when multisystem injury is suspected. Its value depends on careful patient selection because trauma clinicians must balance faster injury detection against radiation exposure, contrast-related complications, cost and pressure on imaging resources. A 2026 analysis published in Emergency Radiology assessed adult trauma patients undergoing whole-body computed tomography at Hamad Trauma Center in Qatar during 2021 and 2022. The comparison focused on patients with at least one acute traumatic injury detected on imaging and those with no acute traumatic injury from head to pelvis. The results point to a clear divide between higher-risk patients with positive findings and a sizeable group with negative scans.
Patient Selection and Injury Patterns
The cohort included 2,555 adult trauma patients who underwent whole-body computed tomography after presentation to the emergency department. More than ¾ had positive findings, while nearly ¼ had no acute traumatic injury detected from head to pelvis. Patients with positive findings were slightly older on average and were more frequently assigned to the highest trauma activation level. Negative findings were more common among patients managed under Level 2 activation, although these patients still received comprehensive imaging.
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Traffic-related incidents formed the largest mechanism of injury across the cohort, followed by falls from height and pedestrian injuries. Falls from height and pedestrian crashes were more frequent among patients with positive scans. Traffic-related incidents and falls of heavy objects were more frequent among those with negative scans. The positive-scan group also showed more evidence of physiological instability on arrival, including a higher shock index and lower Glasgow Coma Scale values at emergency department assessment.
The injury distribution reflected the head-to-pelvis scope of whole-body computed tomography. Chest injuries were the most common regional injuries, followed by head injuries, abdominal injury and spinal injury. Upper and lower limb injuries were recorded separately because they fell outside the imaging definition used to classify positive whole-body CT findings.
Higher Severity and Greater Intervention Needs
Positive whole-body CT findings aligned with substantially higher injury burden. Injury Severity Score values were higher in the positive-scan group, while trauma severity measures also pointed to greater clinical risk. Patients with positive findings had more injuries involving the head, chest, abdomen and spine. Head injury severity was also greater in this group, and repeat head CT was more common than among patients with negative whole-body CT findings.
The gap between positive and negative findings extended beyond injury description into acute management. Patients with positive scans required intubation more often, and the same pattern applied to exploratory laparotomy and massive blood transfusion. Positive focused assessment with sonography in trauma was also more frequent among patients with positive whole-body CT findings. The combination of bedside ultrasound findings, injury mechanism and early physiological measures therefore marked a group with greater need for urgent intervention.
Clinical outcomes followed the same pattern. Patients with positive findings had higher intensive care admission rates, longer mechanical ventilation, longer intensive care stays and longer hospital stays. In-hospital mortality occurred only in the positive-scan group. These outcome differences reflect the greater injury severity and physiological compromise seen in patients with positive imaging rather than evidence that the imaging result alone causes poorer outcomes.
Predictors for Positive Imaging
Multivariable modelling identified several factors associated with positive whole-body CT findings. Increasing age, shock index, lower Glasgow Coma Scale at emergency department assessment, traffic-related incidents, falls from height, pedestrian crashes and a positive focused assessment with sonography in trauma were independent predictors. Gender also remained in the model. Trauma activation level itself did not remain an independent predictor after adjustment for other variables.
These predictors are available during early trauma assessment and could support more consistent imaging decisions. A patient with high-risk mechanism, worse physiological measures and positive bedside ultrasound findings is more likely to have a diagnostically meaningful whole-body CT scan. By contrast, the negative-scan group had lower injury severity, fewer interventions and shorter hospital stays, raising questions about whether comprehensive imaging was necessary in every case.
The proposed imaging pathway separates immediate life-threatening or physiologically unstable presentations from more stable but potentially serious injuries. The first group proceeds to whole-body CT with head, neck, chest, abdomen, pelvis and whole-spine imaging. The second group undergoes selective regional CT based on mechanism, clinical findings and physical examination. Reassessment remains part of the pathway, with escalation to additional imaging if clinical status worsens or new findings emerge. This approach aims to preserve rapid detection of major injury while reducing avoidable radiation and contrast exposure. External validation remains necessary before broader implementation.
Positive whole-body CT findings identify a trauma subgroup with greater anatomical injury, more physiological compromise and higher need for critical interventions. Negative scans remain common enough to raise concerns about routine comprehensive imaging in lower-risk presentations. Patient age, shock index, Glasgow Coma Scale, injury mechanism and focused ultrasound findings offer practical indicators for refining imaging decisions at presentation. A risk-stratified approach may help prioritise whole-body CT for patients most likely to benefit while limiting unnecessary imaging and clinical resource use.
Source: Emergency Radiology
Image Credit: iStock
References:
Hammo A, Abdelrahman R, Abdelrahman H et al. (2026) Whole-Body Computed Tomography (WBCT) for the initial assessment of trauma patients: a retrospective observational study. Emerg Radiol: In Press.
