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
Nov 15, 2019
As we seek to go faster and faster in our systems, heat grows as does the noise from the cooling fans. It is because of this heat and noise, many companies are investigating or switching to submersible cooling (liquid immersion cooling) options. Over the last few years, subme...
Nov 15, 2019
Electronic design is ever-changing to adapt with demand. The industry is currently shifting to incorporate more rigid-flex circuits as the preferred interconnect technology for items that would otherwise be off-board, or require a smaller form factor. Industries like IoT, wea...
Nov 15, 2019
"Ey up" is a cheery multi-purpose greeting that basically means "Hello" and "Hi there" and "How are you?" and "How's things?" all rolled into one....
Nov 15, 2019
[From the last episode: we looked at how intellectual property helps designers reuse circuits.] Last week we saw that, instead of creating a new CPU, most chip designers will buy a CPU design '€“ like a blueprint of the CPU '€“ and then use that in a chip that they'€™re...
Nov 15, 2019
Last week , I visited the Cadathlon@ICCAD event at the 2019 International Conference on Computer Aided Design . It was my first CADathlon and I was quite intrigued , since the organizers webpage... [[ Click on the title to access the full blog on the Cadence Community site. ...