imaging

X RAYS

• focused on hard tissue viewing

• electromagnetic waves shot through body

  • majority passes through onto film

    • bones stop x-rays soft tissue doesnt

ABCS

• ALIGNMENT ADEQUACY

  • alignment

    • how its placed to make sure that we get everything on cam

  • adequacy

    • how much x ray you need to get good view

• BONES

  • first thing you see

• CARTILAGE

  • dont rlly see cartilage, but space between bones where cartilage is supposed to be

    • less dense

SOFT TISSUE

• can see what we can’t see

  • CT SCAN

    • bunch of xrays and then uses computer to put it into a 3d model

    • help find fluid inside body

      • ischemic vs hemorrhagic stroke

    • complex physio trauma

      • bones going in diff places

  • MRI SCAN

    • expensive, slow

    • complex soft tissue injury pretty good, as its diff from x ray

    • how it works

      • protons respond to magnets by aligning w magnetic field

      • radio waves create an electromagnetic field to get them out of alignment

        • dont like this being pulled in diff directions

      • when they turn off radio waves, protons flip back into alignment and release energy

        • dependent on the elements the protons are in

          • allows us to see diff elements in body

      • can create an image based on energy released

    • T1 VS. T2

      • T1

        • initially

      • T2

        • milliseconds after

      • milliseconds diff makes electrons do diff things

    • magnets do weird shit to ur brain

  • struggle w/ acute bleeding

    • human blood has sim properties of brain tissue in early bleeding

CONTRAST

• things u put in the body to see things better on ct or mri

  • diff elemtn number and then through blood to make certain structures easier to see