editor's blog
Subscribe Now

A Buttable X-Ray Detector

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’ve had pixel addressing circuitry on two sides, meaning that you can’t tile them together. (At least not without having “blind stripes” where the decode logic blocks meet up…)

TowerJazz and Tanner worked together with the UK Science and Technology Facility Council’s Rutherford Appleton Labs to develop a unique decoding scheme that allowed them to restrict themselves to only one edge for the circuitry, allowing pixels all the way up to the other three edges. That means that you can tile them in any 2xN configuration.

With each sensor being basically the size of a 200-mm wafer (6.7 Mpixels), they can handle mammography applications with a 2×2 arrangement; longer targets are possible for other applications.

As to how they did the decoding? Yeah… they’re being coy about that. It seems to be largely an analog approach, which is where Tanner contributed to the process. But more details weren’t forthcoming…

You can read more in their release.

EDAS0088-STFCimagesensor_550px.jpg

Leave a Reply

featured blogs
May 24, 2019
It's Memorial Day in the US on Monday, and Cadence is off. So today is the day before a holiday. By tradition, I write about...whatever I feel like. So let's go with figures of speech. Even... [[ Click on the title to access the full blog on the Cadence Community s...
May 23, 2019
The Role Of EDA In AI Achieving Effective Verification and Validation of Vehicle E/E Systems – Part 4 Signal Integrity and high-speed design challenges: interview with Mentor’s Todd Westerhoff Designing For The Edge Benefits of a Digitalization Strategy for Electr...
May 23, 2019
Everybody loves webcasts, right? While some may view webcasts as these kids in Ferris Bueller’s class, others love the on-demand technical education available via this popular medium. In an attempt to appeal to the second group, Samtec is pleased to announce a new Chalk...
Jan 25, 2019
Let'€™s face it: We'€™re addicted to SRAM. It'€™s big, it'€™s power-hungry, but it'€™s fast. And no matter how much we complain about it, we still use it. Because we don'€™t have anything better in the mainstream yet. We'€™ve looked at attempts to improve conven...