Dr. Ralph Schaetzing, Manager, Strategic Standards & Regulatory Affairs, Carestream
You would think that the answer to this question would be an easy “yes,” but it is not as clear-cut as you would believe. The reality is that many factors influence actual and perceived image quality. A so-called “poor” image detector can still produce good-quality images, while a “good” detector can easily produce poor-quality images. The bridge between the detector and its images involves exposure techniques (e.g., kV, mAs, filtration, anode, dose, etc.), image processing (e.g., optimization, compression), and the characteristics of the display system itself. Finally, the observer at the end of the imaging chain also plays a critical role..
On March 4, I am going to be conducting a webinar for members of the Carestream VIBE user group that will seek to answer the question, “Does Image Quality Matter?” The definition of image quality often differs from person to person, depending on whether the focus is on objective evaluation, subjective perception or task performance. This makes the subject of image quality both interesting and complex.
The webinar will attempt to reduce this complexity by focusing on three basic questions about image quality:
- What is it?
- Where is it?
- Who should care, and why?
To answer these questions, we’ll look at the contributions to image quality from detector performance (e.g., contrast, spatial resolution, noise), from image processing (preprocessing, display optimization), and from display performance (e.g., perceptual linearization, calibration). At the end, we’ll also examine the role of observer performance (e.g., human visual system characteristics) in the final determination of image quality.
At the end of the webinar, attendees will have a clear understanding of what we/they mean when we/they say “image quality” and how it may differ across its three main categories—objective, subjective, and performance-based. Attendees will also understand the important role that the observer plays in determining the success or failure of an imaging chain. By the last slide, attendees will be able to answer with greater confidence the question “Does image quality matter?” and be able to explain the complex balance of factors in the imaging chain that makes this simple question significantly deeper than might first appear.
You must be a Carestream customer to join the VIBE user group. If you are a customer and would like to join, you can click here.
If you would like to register for this webinar, please click here.