Every specification sheet leads with resolution — line pairs per millimetre, the sensor's finest possible line. But two sensors can share a resolution and be worlds apart at the dose you actually use. The number that separates them is detective quantum efficiency, and it is...
Sharpness in a dental image is not a feeling but a measurable ceiling. A tour of pixel pitch, line pairs per millimeter, and the modulation transfer function that quietly decides what your radiograph can and cannot show....
A radiograph is a painting in gray. Understanding contrast, density and the tonal scale is the quiet craft that separates a diagnostic image from a merely visible one....
A flawed radiograph discovered at read-out is a retake that rarely happens. Software that grades technical quality while the sensor is still in the mouth changes the economics of getting it right the first time....
A neural network can now look at a periapical radiograph and tell you, in the instant it is captured, whether it is diagnostic. What it means when the image acquires its own critic....
For a hundred years the dental radiograph has been an average — a blur of charge summed across an exposure. The photon-counting detector refuses to average. It counts each X-ray individually, and in doing so quietly rewrites what a diagnostic image can be....
A dental radiograph looks like a photograph, but it is really a measurement — a shadow cast by an X-ray beam onto a flat receptor. Whether that shadow reports a root's true length or a convincing lie depends almost entirely on geometry, and on the...
At the magnifications clinical photography demands, sharpness is not a plane but a sliver — often shallower than a single tooth is deep. Everything that makes a dental image trustworthy begins with a decision about the aperture, and everything the aperture cannot solve, focus stacking...
On the monitor a digital impression is seductive: clean, colour, rotatable, apparently perfect. But a scan that looks perfect and a scan that is accurate are not the same claim, and the gap between them is where restorations quietly fail....