Dear Dr. Roach: In 2016, I had a brain MRI without contrast, which showed chronic small-vessel brain disease and a remote lacunar infarct in the right cerebellum. This brain MRI was done because I ...

The most common diagnosis reported for head-CT scans without contrast agents in level 5 visits were "dizziness and giddiness", and for head-CT without and with contrast agents was "headache"." ...

Subdural Hematoma (Acute). Axial CT scans without contrast. Note the crescent shape overlying and compressing the right hemisphere. This is the typical CT scan picture of an acute subdural hematoma.