Hardware Radiography

Clinical Computer Monitors

One of the smartest guys I know is Doug Yoon. Doug is a dentist but more importantly he is a digital image scientist and the founder of XDR digital radiology. I asked Doug to give me some advice on the best clinical monitors for digital radiography. Here is what he had to say.

Even the lowest end monitor has sufficient pixel resolution for most digital radiographs.  The two most important parameters that manufacturers publish are brightness and contrast ratio.

We recommend a brightness of at least 350-400 candela per. sq meter. (cd/m2) and a static contrast ratio of at least 1000:1.

Note: Dynamic contrast ratio is a misleading parameter because it compares contrast between frames which can generate amazing million to one ratios. This is not relevant for viewing radiographs because these are ‘static’ non-changing images.

However the best test is to view a few radiographs on some candidate monitors  This is because intangible, un-reported parameters like SNR and precision of voltage control over each pixel can greatly influence image quality – especially when it comes to discrimination of subtle difference in gray scale.  Compromising in these parameters can allow manufacturers to cut corners in design and manufacturing costs, yet they can still tout ‘good’ specs for brightness and contrast ratio.

Leave a Reply

Your email address will not be published.