Blurring, or unsharpness, refers to the distortion of the definition of objects in an image, resulting in poor spatial resolution

Types of blur

  • geometric blur
    •  limited by focal spot size, distance from the source to the patient, distance from patient to receptor
  • detector blur
    • ​limited by detector components (screen thickness in film systems, detector element size in digital systems)
  • motion blur 
    • caused by voluntary/involuntary patient movement 
  • absorption blur
    • blurring at the edge of a rounded/tapered structure where there is a gradual change in x-ray absorption across this boundary
Imaging technology

Article information

rID: 80077
Synonyms or Alternate Spellings:
  • Unsharpness

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