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'Sequences'
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andri anto

Mon. 14 May.07,
14:26

[Start of:
'Help!!!'
0 Reply]


 
  Category: 
Sequences and Imaging Parameters

 
Help!!!
Anyone!!! give me data about Sequences and Imaging Parameters for MRI Thosiba. I'm at drandri_77@yahoo.com
Help me please....
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Anne Nelson

Tue. 8 May.07,
02:09

[Start of:
'Proton Density and FOV'
2 Replies]


 
  Category: 
Sequences and Imaging Parameters

 
Proton Density and FOV
I've been told that proton density sequences don't work well with a large field of view. (approx 350-400) Is this the case, and why?

Thanks in advance,

Annika
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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

 
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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peter hobden

Wed. 14 Feb.07,
15:27

[Reply (1 of 2) to:
'MRI Marker'
started by: 'Tian Ming'
on Mon. 22 Jan.07]


 
  Category: 
Applications and Examinations

 
MRI Marker
There is a company which make MRI skin markers but they are poor for fat-sat sequences.

I have emptied oil capsules of fish oil and instead added my own ingredients into them, according to the specific sequence I use.

Try:

*Pure Water
*V V Dilute MRI contrasts
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Tian Ming

Mon. 22 Jan.07,
10:23

[Start of:
'MRI Marker'
1 Reply]


 
  Category: 
Applications and Examinations

 
MRI Marker
Are there any MRI markers that are visible on all sequences, small, flat, cheap and self-adhesive?
Vitamin E or fish oil capsules work mostly well, but the signal is suppressed on sequences with fat saturation.
To mark a small region they are too big and
dent the skin where fixed.

Thankful for every suggestion and friendly greetings to all.
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