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| Result: Searchterm 'HIS'
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Tomas Randell
Mon. 20 Jun.05,
19:38
[Reply (1 of 3) to:
'Metalic particles into the cornea'
started by: 'Jorge Cazal'
on Mon. 13 Jun.05]
 Category:
Safety
|
| Metalic particles into the cornea |
For my personal opinion, it is not to expect that these microscopic steel particles are a contraindication for an MRI of the head. An injury of the patient by dislocation or
torque presents not a real risk because of the small size.
The possibility of heating is minimal and can be additional lowered by reducing the SAR. Artifacts may reduce the image quality a little, but diagnostic brain imaging is certainly possible. The use of a mid or low field MRI machine will also reduce any risks.
Hope this will help.
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Jorge Cazal
Mon. 13 Jun.05,
17:06
[Start of:
'Metalic particles into the cornea'
2 Replies]
Category:
Safety
|
| Metalic particles into the cornea |
Dear Friends:
We are working in a Ophthalmology Department at Institut Universitari Dexeus-USP in Barcelona.
We received a patient who was treated for myopia some time ago using a LASIK technique ( Laser In situ Keratomileusis) as you probably know, cornea was sliced and lasered using a microkeratome however blade oscilation in the past eventually spread into the interface particles comming from steel inox blade´s.
Could this affect an MRI of Head, is this a contraindications, ( particles are microscopic/multiple and are interlamellar into cornea )
Thank you for your input
Kind Regards
Jorge Cazal;MD
Cornea & Refractive Surgery Unit
Institut Universitari Dexeus-Barcelona
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Chris Gardener
Wed. 11 May.05,
22:43
[Reply (1 of 2) to:
'Radio frequency exposure'
started by: 'Reader Mail '
on Tue. 3 May.05]
Category:
Basics and Physics
|
| Radio frequency exposure |
If the magnetic field strength (measured in Tesla/Gauss) increases, also the SAR increases. For fields up to 3.0 Tesla, the value of SAR is proportional to the square of the field but at high fields the body becomes increasingly conductive, with the need of increased RF power. The EMF exposure is reduced by the square of the distance.
Hope this will help
Chris
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Sue Johanson
Tue. 3 May.05,
18:12
[Reply (1 of 2) to:
'diffusion MRi'
started by: 'tina muthana'
on Thu. 14 Apr.05]
Category:
Basics and Physics
|
| diffusion MRi |
Hi Tina,
i am not sure whether it will answer your question, but I found this diffusion tutorial helpful: http://ej.rsna.org/ej3/0095-98.fin/index.htm
regards
Sue
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Pooja Jalikop
Wed. 9 Mar.05,
15:02
[Start of:
'Perfusion analysis'
2 Replies]
Category:
Sequences and Imaging Parameters
|
| Perfusion analysis |
Hi,
I am Pooja from Manipal,India. I am doing MS in Medical Software. I'm currently doing a project on Perfusion analysis for stroke calculation. If anyone knows any sites to refer or has any data/material for this topic please let me know.
Regards
Pooja
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