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| Result: Searchterm 't2'
found in 67 messages |
| Result Pages: 1 2 3 4 5 6 7 8 9 10 11 [12] 13 14 |
More Results:  Database (155) News Service (28) Resources (5) |
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Scott Lytle
Thu. 4 Jan.07,
17:52
[Reply (2 of 3) to:
'ETL for a STIR'
started by: 'Shaun Schofield'
on Thu. 30 Mar.06]
 Category:
Sequences and Imaging Parameters
|
| ETL for a STIR |
It depends.
When Centric echo allocation is used you have higher SNR, a low TE, but more image blurring. Very similar to a PD. I prefer an echo train of less than 8 in this case.
When Sequential echo allocation is used you have lower SNR, a higher TE (I prefer less than a TE of 60), but significantly less image blurring. Very similar to a T2 or FLAIR. In this case your echo train length is governed by your TE and image blurring is not usually an issue. Depending on how short of an inter-echo time you can use, and by keeping an eye on the TE, the echo train can be as high as you want.
Hope this helps.
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Renate Bloemer
Wed. 14 Jun.06,
22:22
[Reply (1 of 2) to:
'T1/T2 relaxation time charts'
started by: 'Reader Mail'
on Fri. 12 May.06]
Category:
General
|
| T1/T2 relaxation time charts |
You can find a table of the approximate values of the two relaxation time constants and some relevant formulas on:
http://en.wikipedia.org/wiki/T2*
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Shaun Schofield
Thu. 30 Mar.06,
04:07
[Start of:
'ETL for a STIR'
2 Replies]
Category:
Sequences and Imaging Parameters
|
| ETL for a STIR |
Whats the ETL range for a STIR? Assuming 50TE 5000TR 150TI.
Does it follow the T2 parameters? Can someone give me the pros/cons of high versus low ETL?
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Abraham Morejon
Wed. 30 Nov.05,
13:52
[Start of:
'Whole Body Scan MRI'
0 Reply]
Category:
Sequences and Imaging Parameters
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| Whole Body Scan MRI |
Can anyone tell me what FOV is used on a 2 year old whole body scan? , On an adult whole body scan ? , and how many table moving stations are needed for an adult whole body scan? I am doing a coronal Stir,T1 FFE coronal and a SSFSE T2W coronal.
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Susan Angelico
Thu. 15 Sep.05,
20:07
[Reply (1 of 3) to:
'3T imaging parameters'
started by: 'Nancy Dudek'
on Fri. 26 Aug.05]
Category:
Sequences and Imaging Parameters
|
| 3T imaging parameters |
At 3T the T1 time is longer (so the TR should also be longer) and the T2 time is shorter (TE can be shorter). However, when we got a 3T machine we tested different TR and TE's and found out that in practice the useful range don't has a big difference from that of a 1.5T MR system.
The contrast looks a bit different - that's normal.
In addition, ask the manufacturer.
There are a lot of other parameters that affect the contrast in 3T.
Hope this will help
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