The goal of this retrospective observational study is to evaluate the diagnostic accuracy of pulmonary contusion volume in predicting early pneumonia in patients with thoracic trauma.

The primary question we aim to answer is: What is the diagnostic accuracy of pulmonary contusion volume in predicting pneumonia within 7 days post-trauma?

Moreover, we aim to explore which is the overlap between the contused segments and those developing pneumonia.

Finally, we aim to explore relevant differences in radiomic features between contused segments that developed pneumonia.

Inclusion Criteria:

• Admission to the ED for trauma as primary diagnosis
• Whole-body contrast CT scan performed within 6 hours from admission

Exclusion Criteria:

• Age <18 years

This study includes all the consecutive patients admitted to the ED of the institution for trauma and having a contrast whole-body CT scan performed within 6 hours from admission

Anonymized data will be shared upon reasonable request