CT

• what's a CT scan?

  • inject special dye into the person
  • use X-rays
  • to produce cross-sectional images (2D)
  • of major brain structures
  • low resolution
• dense structures absord more X-rays,

  so look lighter in the image

  e.g. blood

  so bleeding in brain will show up as a light region
• advantages:

  • cheaper than MRIs
  • low costs
  • faster images
  • more movement - less claustraphobia
• disadvantages:

  • low resolution only shows major strucutees, not ssmall strucutre e.g. tumours & hypothalammus
  • X-rays can damage DNA in cells
  • only 2D image
  • shows structure not fucntion
  • not real time -> shows image from 1 point in time