Anode heel effect

• Anode Heel Effect


  Variation in the intensity due to the angle at which the X-rays are emitted from the focal spot
• What is anode heel effect ?

  Variation of intensity due to the angle at which the x-rays are emitted from focal spot
• The x-ray beam diminishes fairly rapidly
• Anode heel effect


  Variation in the intensity due to the angle at which the X-rays are emitted from the focal spot
• The intensity of the X-ray beam diminishes fairly rapidly from the central ray toward the anode side and increases slightly toward the cathode side
• Line Focus Principle


  1. Anode 1

  2. Cathode

  3. Incident electron beam

  4. Small effective focal spot

  5. Central ray
• The target face of a diagnostic X-ray tube is set at an angle of about 17° so that the real area that the electrons strike is relatively large but the area of X-ray emission appears small
• Functions of the application of Line Focus Principle

  1. To get the wide area of real or actual focal area for having the large space of target area and heat capacity

  2. To appear the small effective focal spot to reduce the geometric unsharpness