Head CT is the first choice in trauma situations. In the case of an accident, bleeding in the brain is possible if head injury has occurred and CT is the quickest, best imaging modality to check for bleeding in the head and for skull fractures.
Head scans performed in CT take only minutes. This is why CT is also the first choice when a ruptured artery occurs in the brain resulting in stroke. MRI is also used in conjunction with CT for stroke in order to evaluate how much brain tissue may have been damaged from loss of blood supply from a ruptured artery in the brain.
Arteries in the brain can be evaluated by CTA (CT angiogram) and also by MRA (MRI angiogram). CT has better spatial resolution in angiography work when compared to MRI. Intravenous (IV) contrast is injected into an IV to visualize and enhance the arteries in the brain for angiographic imaging in CT and MRI.
Tumors in the brain are better seen using MRI. And even though CT can detect brain tumor, MRI is by far more sensitive at revealing tumors in the brain because brain tissues have water molecules mixed in with them.
This is part of what makes MRI better at displaying brain tissue because the physics used in MRI makes capturing images of structures that have higher hydrogen molecules much easier to visualize.
In this MRI scan,2 brain tumors are clearly seen.
On the CT, only one brain tumor is seen on this same patient.
is the vital imaging modality in the event of head injury and trauma from accidents. Brain CT scans are much faster than MRI and take only minutes.
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