Most image sensors receive light that has passed through a lens of some sort. This means that a large area can be photographed, for example, and sensed on a chip that is extremely small by comparison with the scene itself.
Not so with medical X-ray imaging. The target sensor gets a full-sized image. Not so hard for dental work, but more challenging for mammography or other full- or partial-body scans.
It’s typically hard, therefore, to provide a solid-state target that can provide seamless coverage. No matter how large they’ve been, they& … Read More → "A Buttable X-Ray Detector"