• Radiology is a special branch that deals with the study and application of imaging technology using X-ray radiations or such other radiation devices for the purpose of obtaining visual information to diagnosing and treatment of diseases.
  • An X-ray generator is a device used to generate X-rays .An X-ray imaging system consists of an Ax-ray source or generator (X-ray tube) and an image detection system.
  • The X-ray tube (high vacuum diode) operates by emitting electrons from a heated cathode tungsten filament toward a rotating high voltage anode disc.
  • X-ray machines work by applying controlled voltage and current to the X-ray tube. So the beam intensity of X-rays can be controlled by controlling voltage or current.
  • In an X-ray machine we use a multi-tap ac transformer in order to select taps to compensate for incoming line variations. The number of outputs is referred to as `taps’ and it may range from 2 outputs to many outputs depending on the type of multi-tap transformer used.
  • The filament transformer in an X-ray machine transforms the ac line to supply power for heating the cathode filament.
  • Timing circuit is used to control the turn-on, turn-off and length of X-ray exposure delivered to the patient.
  • X-ray can be used to produce an image of any body parts. It is also available as a portable unit which can be used in hospitals widely and X-rays can be taken anywhere even in bedside.
  • Computed Axial Tomography (CAT) is the medical imaging method employing tomography created by computer processing.
  • In tomography the data obtained can be processed and analyzed using different techniques and the various bodily structures can be demonstrated based on their ability to block X-rays.
  • In CAT, measurements are taken from the transmitted X-rays through the body. These contain information on all parts of the body in the path of X-ray beam.
  • We can reduce the radiation dose up to an extent but reducing the radiation dose can affect the image quality.
  • The X-ray detectors are placed in a ring. shaped apparatus which rotate around the patient. They detect the X-ray beam intensity of each tissue and feed to a computer.
  • X-ray machines are used in healthcare for visualizing bone structures and other dense tissues such as tumors.By using X-rays cancer cells can be treated in radiotherapy.
  • X-ray machines are also used in security system because they can screen objects non-invasively.

Author Bio: The Author of this article, Sreejith is writing articles onĀ X-Ray Tube Working Principle and Electronics and Communications