There are two main types of X-ray tubes:

  1. Open X-ray tube (open tube):
    • Characteristics:
      • Expensive upfront cost.
      • Requires regular maintenance.
      • Self-calibration capability.
      • Consumables include filaments and targets.
      • X-rays are transmitted through the target.
  2. Conventional enclosed radiographic tube (closed tube):
    • Characteristics:
      • Lower initial cost compared to open tubes.
      • Maintenance-free.
      • Tube lifespan typically around 5000 hours, after which replacement is necessary.
      • Aging may lead to increased focus and image blurring.
      • Consumables include the tubes themselves.
      • X-rays emitted via refraction.