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Science Forum Index » Image Processing Forum » PCI Frame Grabber in Medical Imaging...
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 Posted: Wed May 21, 2008 8:59 pm |
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Guest
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Hi,
just wanna know as to why images captured from PCI frame grabbers are
not suitable for diagnosis and they do not have any medical value; in
that sense the images captured from PCI Frame Grabber and wrapped with
DICOM headers would also be rendered "not useful for diagnosis".
Dustin |
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| ImageAnalyst... |
| Posted: Thu May 22, 2008 5:08 am |
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Guest
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On May 22, 2:59 am, msabs... at (no spam) gmail.com wrote:
Quote: Hi,
just wanna know as to why images captured from PCI frame grabbers are
not suitable for diagnosis and they do not have any medical value; in
that sense the images captured from PCI Frame Grabber and wrapped with
DICOM headers would also be rendered "not useful for diagnosis".
Dustin
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I've never heard that before. Sounds strange. Who told you that?
Has the FDA for some reason banned the use of PCI frame grabbers? Can
you cite any source of this information? |
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| Posted: Thu May 22, 2008 6:57 pm |
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Guest
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On May 22, 8:08 pm, ImageAnalyst <imageanal... at (no spam) mailinator.com> wrote:
Quote: On May 22, 2:59 am, msabs... at (no spam) gmail.com wrote:
Hi,
just wanna know as to why images captured from PCI frame grabbers are
not suitable for diagnosis and they do not have any medical value; in
that sense the images captured from PCI Frame Grabber and wrapped with
DICOM headers would also be rendered "not useful for diagnosis".
Dustin
------------------------------------
I've never heard that before. Sounds strange. Who told you that?
Has the FDA for some reason banned the use of PCI frame grabbers? Can
you cite any source of this information?
......................................
I've never heard that before. Sounds strange. Who told you that?
One major reason is that the capture is happening from the screen
There is a screen capture; another reason would be that measurements
in HU
are not correct; people with good background in the industry have
suggested those
reasons.I really dont have indepth information on that, infact i
myself was on the lookout
for reasons
Quote: Has the FDA for some reason banned the use of PCI frame grabbers? Can
you cite any source of this information?
Thanks for response, its now I have learnt that FDA has not banned
PCI Frame
Grabbers. |
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| David Clunie... |
| Posted: Fri May 23, 2008 2:09 am |
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Guest
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On May 22, 12:53 am, Dustcane <msabs... at (no spam) gmail.com> wrote:
Quote: just wanna know as to why images captured from PCI frame grabbers are
not suitable for diagnosis and they do not have any medical value; in
that sense the images captured from PCI Frame Grabber and wrapped with
DICOM headers would also be rendered "not useful for diagnosis".
In general no, in my opinion as a radiologist, video frame-grabbed
images are undesirable for most
medical purposes, and significantly degraded by comparison with the
digital original images, which should be used by preference. It all
depends on the source of the original data, the bit depth, whether the
displayed images have been windowed (e.g., from 12 bits to  , their
original and displayed resolution, the presence of burned in
annotation in the video signal, etc. Video frame grabbing, like
scanning a sheet of printed CT film, is a desperate last resort in
these situations. For visible light sources, like a microscope or
endoscope, a digital camera will give better results than a digitized
video signal. The era of frame grabbing from devices that have no
digital interface or a proprietary digital interface has largely
passed into history, except for essentially obsolete devices.
Having said that, there are still sites with such obsolete devices, or
applications for which the source video quality is not terribly high
in the first place, and there is still a market for frame grabbing
systems. See for example products like TIMS (http://www.tims.com/).
Someone in a reply mentioned FDA approval, and of course any medical
device for sale, whether it is a frame grabber or not, is approved on
its merits for specific applications. I would assume that there are
predicate devices for 510(k) approval of frame grabbers, but I haven't
checked.
David |
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