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| Result: Searchterm 'Shot'
found in 5 messages |
| Result Pages: [1] |
More Results:  Database (46) News Service (4) |
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Bob Owen
Sun. 10 Apr.22,
11:49
[Start of:
'Query on PROPELLER enhancement'
0 Reply]
 Category:
Artifacts
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| Query on PROPELLER enhancement |
I looked at an MRI from 2016 I originally had for a tongue swelling to see if it might show evidence for Optic neuritis which I believe I had at that time. I noticed coronal slices show the outer circumference of the optic nerve as especially bright and ragged or irregular along much of the length (both eyes). This looks like donut sign for ON but I wonder if it could be an artefact of the imaging process as it used something called PROPELLER which I believe enhances the image. An axial slice also appears to show the tram track sign. Can anyone comment. I have uploaded a screenshot of just a single coronal slice
See uploaded slice
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danilo Scelfo
Wed. 29 Sep.10,
12:15
[Start of:
'How does TE affect DWI acquisition?'
1 Reply]
Category:
Sequences and Imaging Parameters
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| How does TE affect DWI acquisition? |
Hi folk! Just a breath question: how does TE affect conventional sequence (single shot SE-EPI) for DWI acquisition? In particular, how would two acquisitions differ from each other if acquired with TE=90/106ms respectively (being equal all the other parameters, i.e. TR=11s, same FOV, …)? Thanks for any opinion you will give me. Danilo.
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Jenny Jordan
Sat. 17 Nov.07,
20:11
[Reply (2 of 4) to:
'Haste and Rare sequences'
started by: 'Elena sussi'
on Tue. 13 Nov.07]
Category:
Sequences and Imaging Parameters
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| Haste and Rare sequences |
Hi Elena,
you can find the different names for the same sequences and options used by manufacturers at: http://www.mr-tip.com/serv1.php?type=cam .
The manufacturers have in principle similar sequences with small differences. So, as you mentioned you can take "sequences as HASTE" or "sequences type RARE".
However, you can lead back these sequences also to the fundamental sequence type FSE ( fast spin echo: http://www.mr-tip.com/serv1.php?type=seq&sub=12 ). Fast sequences as HASTE ( http://www.mr-tip.com/serv1.php?type=db1&dbs=haste ) are especially useful in cases of movement caused by their single shot technique: http://www.mr-tip.com/serv1.php?type=db1&dbs=Single%20Shot%20Technique .
Hope this helps
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Paul Tesla
Fri. 16 Nov.07,
08:55
[Reply (1 of 4) to:
'Haste and Rare sequences'
started by: 'Elena sussi'
on Tue. 13 Nov.07]
Category:
Sequences and Imaging Parameters
|
| Haste and Rare sequences |
RARE is the Generic name for TSE or FSE. So I guess you should say "Single-shot RARE with half fourier acquisition".
source: MRI. From picture to proton. D.W McRobbie
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