Image Quality

• Image Quality

  Visible sharpness of the image
• Image quality involves:

  • Definition
  • Resolution
  • Detail
  • Sharpness
  • Visibility of Detail
  • Edge Gradient
  • Umbra
• Opposite of detail is:

  • Penumbra
  • Blur
• Resolution

  Ability to image two separate objects and visually distinguish one from the other
• What are the two different types of Resolution?

  1. Spatial Resolution
  2. Contrast Resolution
• Spatial Resolution

  ability to distinguish between two separate objects of high subject contrast such as bone and soft tissue
• Contrast Resolution

  Ability to distinguish anatomical structures of similar subject contrast (low contrast)
• Increased contrast resolution:

  • more shades of gray
  • ability to differentiate two objects
• Decreased contrast resolution

  • less shades of gray