| Author |
Magnetic viewing film?
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| Repeating Rifle 2005-01-08, 4:07 am |
| I have had a Hakim valve installed for treatment of normal pressure
hydrocephalus. So far, I have had two x-rays taken to verify the valve
setting.
Is it possible to devise a system using magnetic viewing film to determine
the valve setting without using ionizing radiation or other expensive
imaging? Has magnetic viewing film ever been used for medical imaging?
Bill
| |
| John Chewter 2005-01-08, 11:10 am |
| MRI Scan - Magnetic Resonance Imaging.
Check this site for more details
http://www.netdoctor.co.uk/health_a...ons/mriscan.htm
--
John Chewter
http://www.keyneimage.co.uk
"Repeating Rifle" <salmonegg@sbcglobal.net> wrote in message
news:BE04DD45.2F044%salmonegg@sbcglobal.net...
>I have had a Hakim valve installed for treatment of normal pressure
> hydrocephalus. So far, I have had two x-rays taken to verify the valve
> setting.
>
> Is it possible to devise a system using magnetic viewing film to determine
> the valve setting without using ionizing radiation or other expensive
> imaging? Has magnetic viewing film ever been used for medical imaging?
>
> Bill
>
| |
| Repeating Rifle 2005-01-08, 7:11 pm |
| in article cronq1$t93$1@titan.btinternet.com, John Chewter at
john@LESS_SPAMchewter.f9.co.uk wrote on 1/8/05 5:39 AM:
> MRI Scan - Magnetic Resonance Imaging.
>
> Check this site for more details
>
> http://www.netdoctor.co.uk/health_a...ons/mriscan.htm
>
I know about MRI. That was used to examine my head in the first place. I am
asking about INEXPENSIVE techniques for view an implant that contains
magnetic components. A Hakim valve is one of them and is close to the
surface just under the skin.
Bill
| |
| John Chewter 2005-01-08, 7:11 pm |
| If the valve, in question, was designed with this in mind, I can think of
several 9possibly novel) low-tech, safe and non-intrusive methods to read a
valve's setting.
I majored in electronic metrology and it would appear to me to be a
relatively straight-forward design proposition, from the instrumentation
perspective. . None of them would involve internal batteries, X-Rays,
Magnetic viewing film or indeed imaging at all. I dare say there may be
issues in valve design & reliability that would limit the options though. I
guess X-Rays provides a simple cheap, reliable method - on a standard risk
assessment?
Maybe you should take this up directly with the manufacturers?
John Chewter
>I have had a Hakim valve installed for treatment of normal pressure
>hydrocephalus. So far, I have had two x-rays taken to verify the valve
>setting.
>Is it possible to devise a system using magnetic viewing film to determine
>the valve setting without using ionizing radiation or other expensive
>imaging? Has magnetic viewing film ever been used for medical imaging?
>Bill
http://www.keyneimage.co.uk
"Repeating Rifle" <salmonegg@sbcglobal.net> wrote in message
news:BE057B34.2F145%salmonegg@sbcglobal.net...
> in article cronq1$t93$1@titan.btinternet.com, John Chewter at
> john@LESS_SPAMchewter.f9.co.uk wrote on 1/8/05 5:39 AM:
>
>
> I know about MRI. That was used to examine my head in the first place. I
> am
> asking about INEXPENSIVE techniques for view an implant that contains
> magnetic components. A Hakim valve is one of them and is close to the
> surface just under the skin.
>
> Bill
>
| |
| richard.epstein@alum.mit.edu 2005-01-09, 10:09 pm |
| The valve can be changed by an MRI and after an MRI, it needs to
be checked with an x-ray.
Therefore, your idea won't work.
Search for MRI in:
http://www.codmanjnj.com/PDFs/Prog_ProcedureGuide.pdf
Repeating Rifle wrote:
> I have had a Hakim valve installed for treatment of normal pressure
> hydrocephalus. So far, I have had two x-rays taken to verify the
valve
> setting.
>
> Is it possible to devise a system using magnetic viewing film to
determine
> the valve setting without using ionizing radiation or other expensive
> imaging? Has magnetic viewing film ever been used for medical
imaging?
>
> Bill
| |
| John Chewter 2005-01-10, 4:07 am |
| Mine would though ;)
--
John Chewter
http://www.keyneimage.co.uk
<richard.epstein@alum.mit.edu> wrote in message
news:1105328065.090616.137730@c13g2000cwb.googlegroups.com...
> The valve can be changed by an MRI and after an MRI, it needs to
> be checked with an x-ray.
>
> Therefore, your idea won't work.
>
> Search for MRI in:
> http://www.codmanjnj.com/PDFs/Prog_ProcedureGuide.pdf
>
>
>
> Repeating Rifle wrote:
> valve
> determine
> imaging?
>
| |
| Repeating Rifle 2005-01-10, 7:11 pm |
| This in regard to a Hakim valve.
in article 1105328065.090616.137730@c13g2000cwb.googlegroups.com,
richard.epstein@alum.mit.edu at richard.epstein@alum.mit.edu wrote on 1/9/05
7:34 PM:
> The valve can be changed by an MRI and after an MRI, it needs to
> be checked with an x-ray.
>
> Therefore, your idea won't work.
The process I am describing does NOT ivolve MRI imaging. The valve has four
tiny magnets for setting it externally with a programming device. The
viewing film looks something line a sheet of liquid crystal material that
shows gradients in the magnetic field. I is like iron filings in a sheet.
Bill
| |
| richard.epstein@alum.mit.edu 2005-01-12, 7:10 am |
| The valve can be changed by an MRI and after an MRI, it needs to
be checked with an x-ray.
Therefore, your idea won't work.
Search for MRI in:
http://www.codmanjnj.com/PDFs/Prog_ProcedureGuide.pdf
Repeating Rifle wrote:
> I have had a Hakim valve installed for treatment of normal pressure
> hydrocephalus. So far, I have had two x-rays taken to verify the
valve
> setting.
>
> Is it possible to devise a system using magnetic viewing film to
determine
> the valve setting without using ionizing radiation or other expensive
> imaging? Has magnetic viewing film ever been used for medical
imaging?
>
> Bill
| |
| John Chewter 2005-01-12, 11:09 am |
| Mine would though ;)
--
John Chewter
http://www.keyneimage.co.uk
<richard.epstein@alum.mit.edu> wrote in message
news:1105328065.090616.137730@c13g2000cwb.googlegroups.com...
> The valve can be changed by an MRI and after an MRI, it needs to
> be checked with an x-ray.
>
> Therefore, your idea won't work.
>
> Search for MRI in:
> http://www.codmanjnj.com/PDFs/Prog_ProcedureGuide.pdf
>
>
>
> Repeating Rifle wrote:
> valve
> determine
> imaging?
>
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