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| Result: Searchterm 'sequence'
found in 106 messages |
| Result Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 [17] 18 19 20 21 22 |
More Results:  Database (378) News Service (28) Resources (10) |
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Oleg Borodin
Thu. 9 Aug.07,
13:46
[Start of:
'T1 measurements on 1.5T scaner'
0 Reply]
 Category:
Basics and Physics
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| T1 measurements on 1.5T scaner |
Dier colleges
I have same trouble with counting T1 of the gadolinium solution.
f.ex.
There are six fantom with gadolinium solution in 0.5, 1, 2, 4, 8 and 16 mmol/l. Fantoms scanned with pulse sequences SE with TR equal 50, 100, 200, 300, 400 ... 4000 ms. For each fantom calculated T1 by iteractive minimizing technique the equation: S(TR)=M0*(1-exp(-TR/T1))
At the result, I have six T1: 72, 170, 255, 403, 725, 1474 ms.
How can I calculate T1 and R1 of the pure solution of contrast media?
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andri anto
Fri. 25 May.07,
06:39
[Reply (1 of 2) to:
'What´s this in L3?'
started by: 'Rob van den Dobbelsteen'
on Sat. 10 Mar.07]
Category:
Applications and Examinations
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| What´s this in L3? |
You just give t2 sagital WI, that not enough for determined what the problem in L3 spine, better you asked to radiologist and show all the MRI picture. Cause i saw there lession in corpus L3 and bulging in discus L3-l4 (HNP). To know more about something in Corpus L3 you must have all sequence in MRI Lumbal exam.
Andri
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andri anto
Mon. 14 May.07,
14:26
[Start of:
'Help!!!'
0 Reply]
Category:
Sequences and Imaging Parameters
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| 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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