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Radiographic image quality (2)

  • Image quality of a radiographic image is described as
  •               “The subjective judgment by clinician of the overall appearance of a radiograph”
  • The ability of a film to record each point in object as point on film
  • But in radiology this point to point reproduction is never perfect
  • Low kVp produce high subject contrast, provided the kVp is high enough to penetrate part being examined adequately
  • If the kVp is too low almost all xrays are attenuated in pt and never reach film
  • [SmartArt graphic]
    • Increased kVp
    • More penetration in to tissues
    • Interact by compton effect
    • Increased scattered radiation
    • Image noise and decreased contrast

 

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