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'[EE]: Down the hatch ... camera in a pill'
2006\09\06@230136 by Gus S Calabrese

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The August 21 issue of Electronic Engineering Times has a "teardown"  
report
on page 48.  I can send a jpeg to anyone who is interested.

The pill camera runs for 8 hours and is 26.4mm and 11.3 mm wide.
It takes a picture every 0.5 seconds with a color CMOS image sensor  
that is 256 by 256 pixels.

The pill seems pretty dumb, it runs continuously while in the body.  
A Zigbee transceiver seems like it would
save power by imaging when there was something to look at.

I did not see any mention of a method to aim the camera.  That would  
be useful.  Maybe some external
method.  Recharging the batteries from the outside would be really  
cool as the pill appears to be as large as
it is because of batteries.

I imagine that the swallower has to fast for some time before  
ingesting the pillCAM to make for a "clean shot".

I would like to try something like this on myself.  Eliminates an  
annoying rectal probe.
What is the largest item the body will pass thru itself ?  Who among  
you would like to work on
a project like this and sell it as a kit ?


^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AGSC  Augustus Gustavius Salvatore Calabrese
4337 Raleigh Street
Denver, CO
720 222 1309     303 908 7716 cell
adding " spam2006 " bypasses my spam blocker.  Please place in the  
text or at the END of the subject line.
( i am hard to reach by phone )
All ideas, text, drawings and audio , that are originated by me,  and  
included with this signature text are to be deemed to be released to  
the public domain as of the date of this communication .  AGSC
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^


2006\09\06@235151 by Herbert Graf

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face
On Wed, 2006-09-06 at 21:01 -0600, Gus S Calabrese wrote:
> The August 21 issue of Electronic Engineering Times has a "teardown"  
> report
> on page 48.  I can send a jpeg to anyone who is interested.
>
> The pill camera runs for 8 hours and is 26.4mm and 11.3 mm wide.
> It takes a picture every 0.5 seconds with a color CMOS image sensor  
> that is 256 by 256 pixels.

Saw one of those on that show "House", very neat!

TTYL

2006\09\07@141140 by William Bulley

picon face
According to Gus S Calabrese <spam_OUTgscTakeThisOuTspamomegadogs.com>:
>
> I imagine that the swallower has to fast for some time before  
> ingesting the pillCAM to make for a "clean shot".
>
> I would like to try something like this on myself.  Eliminates an  
> annoying rectal probe.

This is used today in practice (as in "in production") in the medical
field.  It is only useful for the upper GI (gasto-intestinal) tract
since the standard colonoscopy "snake" cannot reach the upper GI (aka
small intestine).  However, it is less than completely useful since
it is unsteerable (as you point out).

Regards,

web...

--
William Bulley                     Email: .....webKILLspamspam@spam@umich.edu

2006\09\07@145355 by William Bulley

picon face
According to Patrick Murphy <luke631spamKILLspammts.net>:
>
> Would magnets be strong enough to be used (manually?) to feasibly move
> and steer the pill?

That is hard to say.  Given the bilateral symmetry of the human body
and the roughly two-dimensional aspect of the cross section of the
human trunk (we are more flat, in the abdomen, than round), it might
be problematical to get the correct angle or "spin on the ball" (to
use a billiards term) in order to accurately control the "pill".  I
don't know if there are more sophisticated ways to control a metallic
object with dynamic magnetic fields.  I suspect that magnetic strength
is not the issue, but rather complete accuracy of control.

Regards,

web...

--
William Bulley                     Email: .....webKILLspamspam.....umich.edu

2006\09\07@153751 by John Scott

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face
What about using one of those miniature pager vibration motors to get it
to move. It would be interesting to see if varying the speed / direction
could make it move in different ways.

Regards

John

Patrick Murphy wrote:
{Quote hidden}

2006\09\07@170403 by Sergey Dryga

face picon face
William Bulley <web <at> umich.edu> writes:

>
> According to Patrick Murphy <luke631 <at> mts.net>:
> >
> > Would magnets be strong enough to be used (manually?) to feasibly move
> > and steer the pill?
>
> That is hard to say.  Given the bilateral symmetry of the human body
> and the roughly two-dimensional aspect of the cross section of the
> human trunk (we are more flat, in the abdomen, than round),

It depends on the trunk! One recent example of changes in human
anatomy/rpoportions is that today doctors often have to reconsider how they
deliver subcutaneous injections because people have to thick fat layer and
drugs get stuck in the fat.  

it might
{Quote hidden}

2006\09\07@195644 by Gus S Calabrese

face picon face
Complete accuracy is not required.  As long as the pill can be made  
to spin
and the snapshot rate can be set, all is well.

On 2006-Sep 07, at 15:03hrs PM, Sergey Dryga wrote:

William Bulley <web <at> umich.edu> writes:

{Quote hidden}

It depends on the trunk! One recent example of changes in human
anatomy/rpoportions is that today doctors often have to reconsider  
how they
deliver subcutaneous injections because people have to thick fat  
layer and
drugs get stuck in the fat.

it might
{Quote hidden}

2006\09\07@200019 by Gus S Calabrese

face picon face

On 2006-Sep 07, at 12:09hrs PM, William Bulley wrote:

According to Gus S Calabrese <EraseMEgscspam_OUTspamTakeThisOuTomegadogs.com>:
>
> I imagine that the swallower has to fast for some time before
> ingesting the pillCAM to make for a "clean shot".
>
> I would like to try something like this on myself.  Eliminates an
> annoying rectal probe.

This is used today in practice (as in "in production") in the medical
field.  It is only useful for the upper GI (gasto-intestinal) tract
since the standard colonoscopy "snake" cannot reach the upper GI (aka
small intestine).  However, it is less than completely useful since
it is unsteerable (as you point out).

^ What ho !  It is completely useful in the lower tract since the  
"snake"
approach results in a puncture once every X procedures.
( I am not sure what X is )
I do not want a "snake" up my arse ..... AGSC ^

Regards,

web...

--
William Bulley                     Email: webspamspam_OUTumich.edu

2006\09\07@204033 by D. Jay Newman

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face
> According to Gus S Calabrese <@spam@gscKILLspamspamomegadogs.com>:
> >
> > I imagine that the swallower has to fast for some time before
> > ingesting the pillCAM to make for a "clean shot".
> >
> > I would like to try something like this on myself.  Eliminates an
> > annoying rectal probe.
>
> This is used today in practice (as in "in production") in the medical
> field.  It is only useful for the upper GI (gasto-intestinal) tract
> since the standard colonoscopy "snake" cannot reach the upper GI (aka
> small intestine).  However, it is less than completely useful since
> it is unsteerable (as you point out).
>
> ^ What ho !  It is completely useful in the lower tract since the  
> "snake"
> approach results in a puncture once every X procedures.
> ( I am not sure what X is )
> I do not want a "snake" up my arse ..... AGSC ^

Sorry, but the pill-cam is only useful for the upper GI (small intestine)
because of power-supply problems.

Also it is completely useless in cases like my wife's where the intestine
doesn't move things along fast enough.

I agree with you about the "snake", but when used properly it results
in a better diagnoses more often than it causes problems. Also, if you
get a doctor who has done this proceedure a *lot*, then X goes way down.
--
D. Jay Newman           ! Author of:
KILLspamjayKILLspamspamsprucegrove.com     ! _Linux Robotics: Building Smarter Robots_
http://enerd.ws/robots/ ! (Now I can get back to building robots.)

2006\09\07@204311 by D. Jay Newman

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face
> William Bulley <web <at> umich.edu> writes:

> > According to Patrick Murphy <luke631 <at> mts.net>:
> >>
> >> Would magnets be strong enough to be used (manually?) to feasibly  
> >> move
> >> and steer the pill?
> >
> > That is hard to say.  Given the bilateral symmetry of the human body
> > and the roughly two-dimensional aspect of the cross section of the
> > human trunk (we are more flat, in the abdomen, than round),
>
> It depends on the trunk! One recent example of changes in human
> anatomy/rpoportions is that today doctors often have to reconsider  
> how they
> deliver subcutaneous injections because people have to thick fat  

Sorry, but while all the diagrams of the GI tract show us in two dimensions,
in reality everything is sort of smushed up together without the color
coding. This is one of the reasons that intestinal imaging is so difficult.

And this is without a heavy fat layer to contend with.

And I would *strongly* suggest not getting an MRI while the camera is
still in the body. :)
--
D. Jay Newman           ! Author of:
RemoveMEjayTakeThisOuTspamsprucegrove.com     ! _Linux Robotics: Building Smarter Robots_
http://enerd.ws/robots/ ! (Now I can get back to building robots.)

2006\09\08@111755 by Howard Winter

face
flavicon
picon face
William,

On Thu, 7 Sep 2006 14:51:48 -0400, William Bulley wrote:

> we are more flat, in the abdomen, than round

You speak for yourself!  :-)

Cheers,


Howard Winter
St.Albans, England


2006\09\08@114900 by William Bulley

picon face
According to Gus S Calabrese <spamBeGonegscspamBeGonespamomegadogs.com>:
>
> ^ What ho !  It is completely useful in the lower tract since the  
> "snake"
> approach results in a puncture once every X procedures.
> ( I am not sure what X is )
> I do not want a "snake" up my arse ..... AGSC ^

It is extremely rare and seems to have slight female bias.

It is also an increasing risk for more seasoned citizens.

Regards,

web...

--
William Bulley                     Email: TakeThisOuTwebEraseMEspamspam_OUTumich.edu

2006\09\08@115146 by William Bulley

picon face
According to "D. Jay Newman" <RemoveMEjayspamTakeThisOuTsprucegrove.com>:
>
> Sorry, but while all the diagrams of the GI tract show us in two dimensions,
> in reality everything is sort of smushed up together without the color
> coding. This is one of the reasons that intestinal imaging is so difficult.
>
> And this is without a heavy fat layer to contend with.
>
> And I would *strongly* suggest not getting an MRI while the camera is
> still in the body. :)

I may not have expressed myself very well.  What I was trying to
say was that it would be hard to get angular control over the pill
with simple magnets.  Everything you say about the internal complexity
if the human gut also adds to the problem.

Regards,

web...

--
William Bulley                     Email: webEraseMEspam.....umich.edu

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