Section 8.2

  1. Cat Scans (CT)
    • rules out small cerebral bleeds or to check for tumors
    • Ultrasonography of the vessels leading into the brain, or arteriography is commonly used to check ford any blockages
  2. Advantages of CT are
    • cheaper than most scans
    • is very reliable and accurate for CVA type problems
  3. Magnetic Resonance Imaging (MRI)
    technique that allows a high contrast static picture of the soft tissue, by mapping the element hydrogen's presence using a very large magnetic field
  4. MRI yields
    • superb detail of deep structures of the brain and body
    • detectin tumors, MS and degenerative diseases
  5. Disadvantages of an MRI include
    • magnetic field that can suck out any metal pieces like losse tooth filings, pacemakers, or small sharpnel out of tissues
    • very expensive
  6. Positron Emission Tomography (PET)
    • test which combines the CT w/ radioscopic imagine.
    • can probe not only structure by function of the brain
  7. Most appropriate usage of PET
    in Alzheimer's, mental illness, CVA, and epilepsy
  8. Disadvantages of PET
    • cost of running the machine
    • relatively poor resolution (4-8mm), and its short-acting isotopes
Card Set
Section 8.2
Section 8.2 Diagnostic Tests