This CT scan is an example of Subdural haemorrhage caused by trauma. 
<p>Single arrow marked the spread of the subdural haematoma
</p>
Double arrow marked the midline shift
2007-06-24 17:16 <a href="https://en.wikipedia.org/wiki/User:Glitzy_queen00" class="extiw" title="en:User:Glitzy queen00">Glitzy queen00</a>
24 June 2007 (original upload date). Modified 25 June 2009
Wikipedia Commons File:Trauma subdural.jpg