N-N Tutorials

  X-RAY TUBE • mainly divided into two parts i.e, CATHODE (negative) and ANODE(positive). • the small increase in filament voltage results in large increase in tube current which accelertes high speed electrons from very high temperature filament negative cathode. • within vaccum, towards positive tungsten target anode. • Now, anode rotates to dissipate heat generated. • then xrays are genereted and an xray beam is directed towards the patient. • the xrays penetration and attenuation depends upon the density, there are basically five densities which can be distinguish by the colour factor. • these are AIR (more on the deep black side) for eg. air seen on x-ray chest radiograph. • FAT (less black than the air) • SOFT TISSUE (appears to be dark grey) • BONE (appears white but may vary if any contrast medium is injected) • METAL (it is more brighter than the bone)  X-RAY Images from Google • only 1% xray is generated the rest of the heat is dissipated. If the heat is ...