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New Medical imaging technique
August 3, 2009 10:32 PM   Subscribe


 
those are not holograms, those are photograms. BIG difference. Ah, science reporting.
posted by sexyrobot at 11:07 PM on August 3, 2009


I do not think that word means what you think it means.
posted by benzenedream at 11:28 PM on August 3, 2009


I make FPPs as soviet style declarative sentences!
posted by lalochezia at 11:31 PM on August 3, 2009


I was confused by the use of the term hologram as well, but assumed that the guy in the video knew more than I did. I found this which helps to explain it:

Digital holography is an emergent phase contrast technique that offers an excellent approach in obtaining both qualitative and quantitative phase information from the hologram. A CCD camera is used to record a hologram onto a computer and numerical methods are subsequently applied to reconstruct the hologram to enable direct access to both phase and amplitude information. Another attractive feature of digital holography is the ability to focus on multiple focal planes from a single hologram, emulating the focusing control of a conventional microscope.

More here: With the recent developments of digital holography, where the hologram information is directly recorded on a CCD camera, the optical reconstruction is replaced by a computer reconstruction.
posted by Bort at 11:49 PM on August 3, 2009 [1 favorite]


Lots of books on the subject previewed in Google Books.

Wikipedia article.

Early Pubmed abstract from 10 years ago on the topic.

The web site of the UCLA prof featured in the video.
posted by benzenedream at 1:13 AM on August 4, 2009


I do not think that word means what I did not think it means.
posted by benzenedream at 1:17 AM on August 4, 2009


hmm...interesting links bort...seems like a totally different setup, though...more like conventional holography, just substituting the film for a ccd...definitely not just pouring blood on a ccd. problem is, the diffraction rings on a microscopic photogram look so much like the microscopic structure on a hologram, but is it the same deal? probably not, right? (not to discount the use of photograms in diagnosis...seems like a promising (and inexpensive) new field) is there a quantum mechanic in the house?
posted by sexyrobot at 1:29 AM on August 4, 2009


benny, what word are u talking about? holograms?
also, thanks for the wiki article, i think i get it...they use different frequencies of light to create different diffraction fringes, then do some sort of triangulation to figure out the surface features...clever.
posted by sexyrobot at 1:34 AM on August 4, 2009


I assume they're doing something cool, and they know what they're doing (i.e., if they say it's a hologram, it is,) but it sure would be nicer if there were just a little more detail in the story, rather than harping on the "OMG cheap digital sensors like the one in your cameraphone!" and "OMG save third world lives!" bullet points over and over and over.
posted by blenderfish at 2:19 AM on August 4, 2009 [3 favorites]


Get up close and personal with your innards with these 15 amazing 3D-body shots. Almost all of these images were captured using a scanning electron microscope (SEM), a type of electron microscope that uses a beam of high-energy electrons to scan surfaces of images. The electron beam of the SEM interacts with atoms near or at the surface of the sample to be viewed, resulting in a very high-resolution, 3D-image.
posted by netbros at 2:40 AM on August 4, 2009


FINALLY a video site where it lets you choose which commercial to watch!!! I'm sure it's not new but it's the first time I've actually come across it. Those sites that make you watch the exact same commercial ten times in a row either drive me to the point of tears or I try to go read something else during the commercial and my ADD leads me off and I never get to watch the rest of the program.

And the post itself totally rocks. Inexpensive sensors are the wave of the future in every science IMO. My prediction is that the most important skill in most fields 20 years from now will be your signal processing and data mining skills, grad students with clipboards manually collecting little thimblefuls of data will be a joke.

And of course the benefits to people in the poorer nations are probably the most valuable. I wonder how soon it will be that most doctors and biologists, even there, owned a laboratory-grade digital microscope before they ever owned a car.
posted by XMLicious at 3:03 AM on August 4, 2009


I don't know about the hologram, but that ad for homauto made me hungry.
posted by abc123xyzinfinity at 3:16 AM on August 4, 2009


25 seconds to get through the ads.
30 seconds of irrelevant title sequence.
40 seconds of intro video of smirking host.
constant interleaving of smirking host and racked focus, sometimes simultaneously
pretentious, gimmicky lighting

I could have read twenty paragraphs of dense, interesting factual content in the amount of time I wasted on masturbatory video trash before I got to the first snippet of marginally interesting information.

As far as I'm concerned, video is dead. I don't have time for that shit.

Text is the new black.
posted by seanmpuckett at 3:49 AM on August 4, 2009 [6 favorites]


Digital camera sensor used to make direct digital holograms of blood cells

What does it do now?
posted by Durn Bronzefist at 4:46 AM on August 4, 2009 [1 favorite]


Ah, science reporting. No story ever explains any science, but every story is "poised to revolutionize".

Video science reporting is even worse, because they take random snippets of explanation (from a shakycam) and intersperse them in arbitrary order.
posted by DU at 5:24 AM on August 4, 2009


FYI, sexyrobot benzenedream, Bort & others, the "10 years ago" pubmed post does call it "in-line digital holography". Calling it "holography" bothered me a bit too, but I'm not the techie who named it. And seanmpuckett, like television, ads pay the way and make it free to us.
posted by vvurdsmyth at 5:36 AM on August 4, 2009


That scientist guy does a pretty good Christopher Walken, too!
posted by Xoebe at 7:55 AM on August 4, 2009


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