x-rays_1

x-rays_1

1. ct-scans

   • two dimensional scans can produce a three dimensional image
   • detailed image, good for operations, ionising, radiation dose exposed

2. how are they formed

   • they are formed electronically
     • Charged couple device
       • silicon chips and grids of million of pixels

3. treating cancer

   • x -ray is focused at the tumor using a wide beam. The beam is then rotated to minimise the exposure of the healthy cells.

4. ultrasound

   • frequency 20Hz-20,000Hz
     • break down kidney stone
       • pre-natal scanning of fetus
         • blood flow to organs
           • heart problems
   • non-ionising, produce a fuzzy image

5. Radiogarphy

   • lead lined protective clothing, leave the room, stay behind the screen, special badges
   • clear image, detect metal and bone, ionising, radiation exposed to