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| Result: Searchterm 'sequence'
found in 105 messages |
| Result Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 [19] 20 21 |
More Results:  Database (378) News Service (28) Resources (10) |
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Reader Mail
Mon. 30 Oct.06,
16:25
[Reply (1 of 2) to:
'interleaved slices and mean intensity difference in adjacent slices'
started by: 'Reader Mail'
on Wed. 4 Oct.06]
 Category:
General
|
| interleaved slices and mean intensity difference in adjacent slices |
With interleaved slice acquisition for example in each TR first the odd slices, and then the even slices are acquired. Differences in signal intensity may occur by changes between these acquisitions (like movement), especially with a long TR. In particular, for fMRI sequences with interleaved slice acquisition a slice time correction is recommended to get accurate measurements.
However, I think "large" signal intensity differences with interleaved slices (except fMRI) are rarely seen with usual sequences and sufficient processing (interpolation) algorithms.
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Marco Costa
Sun. 22 Oct.06,
10:27
[Start of:
'MRA'
2 Replies]
Category:
Protocols
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| MRA |
Hello!
Is my first time in this forum! I read it a lot this forum, is very helpfull for my job!
I have a dificult in my mri machine.
First i would like to now how can i construct a bolus teste manualy! I don't have smart prep. What sequence i must use and what parameters i must choose.
Second, can you expline to me the diference between centric fill of K-space and non centric?
When is the best time to star the sequence after take the time injection.
My regards
Marco Costa
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Giorgos Menikou
Sat. 27 May.06,
07:16
[Start of:
'GE Signa Excite 1.5 T HD spectroscopy fine shimming'
0 Reply]
Category:
Spectroscopy
|
| GE Signa Excite 1.5 T HD spectroscopy fine shimming |
Can anyone please give directions for how to use the SpectroScan Tool in spectroscopic sequences.
It is necessary to optimise the shimming in spectroscopy in order to get well defined sharp peaks in the metabolites spectrum.
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Angel Lara
Fri. 20 Jan.06,
14:33
[Reply (2 of 3) to:
'siemens impact expert'
started by: 'Angel Lara'
on Thu. 5 Jan.06]
Category:
Sequences and Imaging Parameters
|
| siemens impact expert |
Thank You,
Please excuse me But how should the silicon scout look?
What other sequences should I run to complete the protocol, and will the other sequences be affected by the scanner tunning to silicone instead of water?
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terry santos
Thu. 5 Jan.06,
23:54
[Reply (1 of 3) to:
'siemens impact expert'
started by: 'Angel Lara'
on Thu. 5 Jan.06]
Category:
Sequences and Imaging Parameters
|
| siemens impact expert |
shim system as normal
Then there should be a scout_silicone protocol.
tirm11_wss60b130.wlc TR 1530
If scout shows sillicone then use
tirm11_wss60b130.wlc TR 8568 4 mm cuts
If scout shows water only then use
tirm11_ss60b130.wlc TR 8568 4 mm cuts
The scout is :22 sec
The other sequences are 3:17
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