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| Result: Searchterm 'Sequences'
found in 59 messages |
| Result Pages: 1 [2] 3 4 5 6 7 8 9 10 11 12 |
More Results:  Database (188) News Service (6) Resources (8) |
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Karen Lesley
Sat. 21 May.11,
16:03
[Start of:
'Best pulse sequences for spinal cord demyelination?'
3 Replies]
 Category:
Applications and Examinations
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| Best pulse sequences for spinal cord demyelination? |
Hi all. I wonder if you can help? A friend has asked me to recommend the best protocols to detect demyelination. She is about to pay a fortune for a private 3T scan and doesn't want to waste her money. Problem is, although I know a fair bit about the brain, I know next to nothing about the spinal cord! I understand that FLAIR is not optimal in the spinal cord, but I'm getting mixed messages about what is from my reading. Is it FSE?! Any advice really gratefully received! Thanks :-)
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syam reddy
Wed. 25 Jan.06,
12:11
[Start of:
'vibe sequences in neuro mri?'
1 Reply]
Category:
Sequences and Imaging Parameters
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| vibe sequences in neuro mri? |
I am trying to cut down on time and have read a few articles that talk about mprage and vibe imaging but I am wondering if I can use them for post contrast imaging instead of t 1 sequence on my brain and spine studies. Anyone have any experience or comments about that?
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Renate Semrau
Mon. 28 Aug.23,
07:23
[Reply (1 of 2) to:
'Improving MEDIC/MERGE/M-ffe and GRE/FFE image quality'
started by: 'Dan Lopez'
on Sun. 27 Aug.23]
Category:
Sequences and Imaging Parameters
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| Improving MEDIC/MERGE/M-ffe and GRE/FFE image quality |
Hi,
Sequences with multiple echoes are unfortunately sensitive to motion and flow artifacts, with the mFFE the echoes are still cumulated afterwards. The use of the head-neck coil provides better SNR. Important are good flow compensation, rest slab, try out foldover direction l/r vs. a/p. Shimming may help, synergy is sometimes better as clear, don't take too many slices, but maybe the signal loss is also a technical problem. Problems in the lung region are common. In short, we use 2D T2 TSE with continuous flow comp.
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Dan Lopez
Sun. 27 Aug.23,
00:03
[Start of:
'Improving MEDIC/MERGE/M-ffe and GRE/FFE image quality'
1 Reply]
Category:
Sequences and Imaging Parameters
|
| Improving MEDIC/MERGE/M-ffe and GRE/FFE image quality |
I work on an Ingenia Elition Philips scanner. I'm having trouble with Axial C-spine sequences for both M-ffe and FFE. On the M-ffe there is always motion in the cord and the contrast is poor. With the FFE the closer we get to the lungs the worse the quality becomes. There is usually loss of signal and the image doesn't look uniform. I've tried a bunch of different parameter combinations to try giving it more signal and contrast while decreasing the motion in the cord but it never seems to look that good. Any suggestions would be appreciated.
Mffe & FFE
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CLAUDIO RIBERTI
Tue. 30 Jan.18,
13:13
[Start of:
'Siemens Skyra 3 T'
0 Reply]
Category:
Artifacts
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| Siemens Skyra 3 T |
In MR cardio exams I perform a sequence called trufi-frequencyScout-multi.
This sequence provides several images (from a same slice) each one with a specific frequency.
After this, we choose the better image and use its frequency value as an entry in the cine subsequent sequences.
The question is: Where do I find the place to insert this Value in the Cine sequence?
I travelled all the cine sequence away and could not find.
Anyone can help?
Thanks a lot.
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