The picture shows CT scan done in the private medical centre I am currently attached to. It shows crescent shaped extra-axial hyperdense lesion over the right hemisphere extending to both the anterior and posterior interhemisheric fissure.More importantly there is midline shift to the left along with effacement of the right sided ventricles.
In a patient presenting with reduced consciousness, a decision needs to be made either to image the patient with CT or MRI. Generally CT brain is preferred as acute-onset blood products are bright on CT where as blood product can be of variable signal on MRI, rendering MR to be less sensitive in the hyperacute and chronic phases. Furthermore, CT scans are much faster than MRI, thus patient who are uncooperative can better tolerate CT scans. Typically a CT scan of the brain is over within a few minutes while MR brain takes about 30-60 minutes, depending on the pulse sequences and planes done.
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