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Table 1 The Marshall CT Classification

From: Using Abbreviated Injury Scale (AIS) codes to classify Computed Tomography (CT) features in the Marshall System

Marshall Class

 

Description

Class I

Diffuse injury I (no visible pathology)

No visible pathology seen on CT scan

Class II

Diffuse injury II

Cisterns are present with midline shift 0-5 mm and/or: lesion densities present no high- or mixed-density lesion > 25 cc may include bone fragments and foreign bodies

Class III

Diffuse injury III (swelling)

Cisterns compressed or absent with midline shift 0-5 mm, no high- or mixed-density lesion > 25 cc

Class IV

Diffuse injury IV (shift)

Midline shift > 5 mm, no high- or mixed-density lesion > 25 cc

Class V

Evacuated mass lesion

Any lesion surgical evacuated

Class VI

Non-evacuated mass lesion

High- or mixed-density lesion > 25 cc, not surgical evacuated