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
Jan 24, 2020
Someone has created a song by taking Pi, assigning each number to a note, and adding harmonies. The result is strangely captivating....
Jan 24, 2020
[From the last episode: We looked at the different ways memory can be organized in different kinds of systems.] Let'€™s look at a scenario: you run a restaurant, but you'€™re short on funds to hire people. So you'€™re your own chief cook and bottle-washer. You do everyt...
Jan 23, 2020
Embedded design trends typically revolve around three main ideas: faster data rates, smaller form factors and cost-effective solutions. Those design trends drive the theme for the 2020 Embedded Tech Trends forum: The Business and Technology Forum for Critical and Intelligent ...
Jan 22, 2020
Master the design and verification of next gen transport: Part One – Overview Master the design and verification of next gen transport: Part Two – High-Level Synthesis Master the design and verification of next gen transport: Part Three – Functional Safety M...

Featured Video

Automotive Trends Driving New SoC Architectures -- Synopsys

Sponsored by Synopsys

Today’s automotive trends are driving new design requirements for automotive SoCs targeting ADAS, gateways, connected cars and infotainment. Find out why it is essential to use pre-designed, pre-verified, reusable automotive-optimized IP to meet such new requirements and accelerate design time.

Drive Your Next Design to Completion Today with DesignWare IP® for Automotive SoCs