A pc combines these pictures into a detailed, third-dimensional image that exhibits any abnormalities or tumors. A CT scan may help discover bleeding and enlargement of the fluid-filled spaces within the mind, referred to as ventricles. Changes to bone within the skull can additionally be seen on a CT scan, and it might be used to measure a tumor’s measurement. A CT scan can also be used if the affected person can’t have an MRI, corresponding to if the person has a pacemaker for his or her heart. Sometimes, a distinction medium is given earlier than the scan to supply better element on the picture.