A 48-year-old man with worsening confusion, lethargy, and garbled speech.

A 51-year-old-woman with fever, cough, and severe neurological deficits.

A 31-year-old woman with migraines and numbness in her fingers and toes.

A 70-year-old man with dizziness and gait changes over the past week.

A 39-year-old woman with hypertension and new-onset seizures.

A 57-year-old woman with a history of lung cancer presents with headaches, left-sided weakness, and an acute decline in mental status.

A 4-year-old girl with a history of gelastic seizures.

A 65-year-old woman with fever, vomiting, diarrhea, and rapidly declining level of consciousness.

A 23-year-old woman with a central nervous system inflammatory condition presents with recurrent headaches.

A 3-month-old infant born prematurely at 34 weeks presents with microcephaly.

A 69-year-old woman undergoing head CT after a fall.

A 21-year-old woman with a history of migraines.

A 70-year-old woman with right-sided enophthalmos.

An 11-year-old boy with mental status changes.

A 67-year-old man with a history of B-cell lymphoma presents for restaging PET/CT scan.

A 45-year-old man with fevers, subacute memory problems, and tremor.

A 32-year-old woman with migraines.

A 17-day-old female infant with failure to thrive and cardiomegaly.

A 14-year-old boy undergoing imaging after cardiac arrest and house fire.

A 47-year-old woman with progressive numbness, hearing loss, vision changes, dysphagia, and nausea/vomiting over the past two months.