but what about for thinner body parts, like hands or feet? A quick scanner for those might still be useful for replacing the need for xrays in some situations.
It might be possible to have the light sent to include positioning information (for example, send a string instead of a single pulse) and correlate where it was seen with where it was sent from.
I've had this idea for a while now that low-heat, very bright LEDs are available as light sources:
1. take an existing CAT scanner: Xray source, detector, mounting system (with the rotating arm) and image processing software.
2. replace the Xray source with a bank of LEDs
3. replace the Xray detector (a scintillation screen? whatever it is) with a CCD
4. start scanning
Obviously there's a whole bunch of experimentation needed to calibrate diffusion due to different types of tissue/bone/marshmallow but the software should be mostly unchanged, the mechanical mounting system would be mostly unchanged, and we'd be replacing a radioactive source with a low-power, low-heat light.
Is anybody working on this? I've asked a couple of professor at a biomedical engineering department but much silence ensued.
The ability to use off-the-shelf components seems like a big plus to me...
There would also be a need to check at what intensity cold light is detrimental to cells (and other small issues like that)
Seeing how it is AT&T, what hemisphere were you expecting?
http://www.corp.att.com/ap/about/where/australia/
ok, they don't mention satellite phones, but as the previous chap said: Frikking Northernhepisphereocentrics.
And 'Southern Sky" _is_ usually taken to be the sky above the southern hemisphere
As I recall, it was a major part of an honours and a PhD thesis:
1987, Dr Mike Newberry, Footprints in the Snow: An Investigation into some aspects of User Unique Identification, University of Sydney.
Ph.D. University of New South Wales 1991 Australia Dissertation: Active Intruder Detection: Some Aspects of Computer Security and User Authentification
Slashdot Mirror
Daniel Galouye Richard MacKenna J. T. McIntosh A.E. van Vogt Cyril Kornbluth Henry Kuttner C. L. Moore James H. Schmitz Cordwainer Smith
Yep. "make room! make room!" by HH and "with folded hands" by Jack Williamson.
if they can just find some way to magnetize it we can clean up broken glass with a magnet....
Dark Universe, counterfeit world
Didn't Sir Fred Hoyle say this in, what, 1982?
Now wait for the first instance of a hacker hypnotizing an entire office to act like chickens, via the light fitting internet system...
but what about for thinner body parts, like hands or feet? A quick scanner for those might still be useful for replacing the need for xrays in some situations. It might be possible to have the light sent to include positioning information (for example, send a string instead of a single pulse) and correlate where it was seen with where it was sent from.
I've had this idea for a while now that low-heat, very bright LEDs are available as light sources: 1. take an existing CAT scanner: Xray source, detector, mounting system (with the rotating arm) and image processing software. 2. replace the Xray source with a bank of LEDs 3. replace the Xray detector (a scintillation screen? whatever it is) with a CCD 4. start scanning Obviously there's a whole bunch of experimentation needed to calibrate diffusion due to different types of tissue/bone/marshmallow but the software should be mostly unchanged, the mechanical mounting system would be mostly unchanged, and we'd be replacing a radioactive source with a low-power, low-heat light. Is anybody working on this? I've asked a couple of professor at a biomedical engineering department but much silence ensued. The ability to use off-the-shelf components seems like a big plus to me... There would also be a need to check at what intensity cold light is detrimental to cells (and other small issues like that)
Seeing how it is AT&T, what hemisphere were you expecting?
http://www.corp.att.com/ap/about/where/australia/ ok, they don't mention satellite phones, but as the previous chap said: Frikking Northernhepisphereocentrics. And 'Southern Sky" _is_ usually taken to be the sky above the southern hemisphere
As I recall, it was a major part of an honours and a PhD thesis:
6 32)
1987, Dr Mike Newberry, Footprints in the Snow: An Investigation into some aspects of User Unique Identification, University of Sydney.
Ph.D. University of New South Wales 1991 Australia
Dissertation: Active Intruder Detection: Some Aspects of Computer Security and User Authentification
(http://www.genealogy.ams.org/html/id.phtml?id=47
Don't know whether Mike's still involved in all this.