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carestream

April 3, 2014 by

Dr. Ralph Schaetzing, Manager, Strategic Standards & Regulatory Affairs, Carestream

Dr. Ralph Schaetzing, Manager, Strategic Standards & Regulatory Affairs, Carestream

Where is image quality? In the capture device? In the image processing? In the display system? In the brain of the viewer? Is it everywhere, or nowhere in particular?

These questions were answered recently in a webinar titled “Does Image Quality Matter?” by taking a closer look at the imaging chain.

Any imaging chain (also a medical one) contains five distinct functions:

  1. Capture (the creation of the image),
  2. Process (which itself consists of three sub-functions: preprocessing of the captured image, optimization for interpretation/viewing, and processing for the output device),
  3. Display (assuming a human is the viewer),
  4. Storage
  5. Distribution.

The answers depends on which image quality we mean: the objective image quality we can measure, the subjective image quality perceived by the viewer, or, particularly important in medical imaging, viewer performance using the image for some interpretation task.

In modern imaging systems, these three “flavors” of image quality are weakly, if at all correlated, which makes the prediction of one kind of image quality from another rather tricky, but also interesting.

Click HERE to see webinar.

 

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