Neuroimaging

Question 1

MRI

Answer 1

Magnetic Resonance Imaging

• Gross structure of the brain
• Diagnosis of new onset psychosis or dementia
• Magnetic field projected onto the brain to delineate gray and white matter
• Structural, functional, metabolic imaging
• Useful for:
  1. Structural imaging
  2. Detecting brain function
  3. Detecting areas of demyelination
• No patients with metal objects in bodies

Question 2

EEG

Answer 2

Electroencephalography

• Electrical impulses for the brain cortex
• Causes of szrs to diagnose epilepsy
• Evaluate brain tumors, abscesses
• Subdural hematoma
• Cerebral infarcts
• Intracranial heorrhages
• Measures electrical activity of the brain from leads connected to surface electrodes placed on the scalp and nasopharyngeal area
• Takes about 45 minutes

Question 3

CT

Answer 3

Computed Topography

• Cheap, fast, do it first!
• Tophographic map of brain and spinal cord
• Specific and or minute abnormalities are enhanced
• Assess cognitive function
• Evaluation of patients with
  1. Migraines
  2. Trauma
  3. Vertigo/dizziness
• Pinpoint the following conditions
  1. Ischemia
  2. Areas of dysfunction in dementia
  3. Areas of brain abnormalities associated with schizophrenia
  4. Tumors

Question 4

PET

Answer 4

Positron Emission Topography
Localize mental activities
May show either increased or decreased activity
Primarily research and very expensive
Maps metabolic activity, blood flow, NT activity,
Test duration is 2-3 hours