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| Result: Searchterm 'tr'
found in 420 messages |
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Johan J
Tue. 20 Mar.07,
16:22
[Reply (1 of 2) to:
'MRI Claustrophobia Interview Request'
started by: 'Sion Rogers'
on Wed. 21 Feb.07]
 Category:
Safety
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| MRI Claustrophobia Interview Request |
Roger,
Claustrofobia is difficult topic, real claustrofobic patient won't enter the room...and thus won't experience MR.
Interesting question is how the environment surounding the actual MR, influences this behaviour (Ambient Experience). Also consider looking at High Field Open MR systems (1.0T).
Cheers
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|  View the whole thread | | |
Johan J
Tue. 20 Mar.07,
15:55
[Reply (1 of 2) to:
'fluid PD vs T2 weighting'
started by: 'Reader Mail'
on Tue. 6 Mar.07]
Category:
Sequences and Imaging Parameters
|
| fluid PD vs T2 weighting |
The truth is basicley that different tissues have different relaxation times, the signal of fluid last longer than fat in a T2, so it appears bright.
But also with a "short" TE of 30ms you can already achieve a high signal of fluid, but this is highley dependend of the TR. A long TR - 5000ms - will give you a high signal of fluid. But scantimes won't be acceptable...
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| | View the whole thread | | |
Rob van den Dobbelsteen
Sat. 10 Mar.07,
16:33
[Start of:
'What´s this in L3?'
1 Reply]
Category:
Applications and Examinations
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| What´s this in L3? |
I´m a Dutch Physiotherapist and not trained in reading MRI images.
Yesterday my last client brought a CD with MRI-images on his first visit. He experiences a lot of lumbar pain, takes lots of painkillers and had a HNP operation earlier.
There is something strange about L3. Can you tell me what it is?
The doctor only told him there was no reason to think he had neurological problems but never mentioned this.
Pictures can be seen here:
http://www.fysioforum.nl/e107_plugins/forum/forum_viewtopic.php?957
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Reader Mail
Tue. 6 Mar.07,
22:48
[Start of:
'fluid PD vs T2 weighting'
1 Reply]
Category:
Sequences and Imaging Parameters
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| fluid PD vs T2 weighting |
Can anyone explain me, why - considering SE sequences with the same TR - fluid in a PD weighting (short TE) should have less signal than in a T2 weighting (long TE)? eg:
Fig 10, p 1397; radiographics resident tutorial: contrast mechanisms in spin echo MR imaging; Radiographics 1994; 14; pp 1389-1404
I would expect that the signal intensity of any tissue (regardless of it Proton density of T2-relaxation time) should decrease with increasing echo time.
Thank you
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Sion Rogers
Wed. 21 Feb.07,
20:42
[Reply (1 of 3) to:
'Claustrophobia'
started by: 'Monica Muller'
on Tue. 16 Mar.04]
Category:
Patient Care and Comfort
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| Claustrophobia |
Dear Monica,
My name is Sion Emlyn Rogers. I am currently a student at Columbia University. I doing a piece on MRI claustrophobia and the way people cope with it.
I was hoping you would be willing to speak with me.
My email address is ser2129@columbia.edu
Many thanks
Sion
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