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| Result: Searchterm 'Signa'
found in 78 messages |
| Result Pages: 1 [2] 3 4 5 6 7 8 9 10 11 12 13 14 15 16 |
More Results:  Database (382) News Service (60) Resources (16) |
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Kimberly Wilridge
Fri. 26 Jul.13,
16:42
[Start of:
'GE Signa - 17,18,19 Phantoms Found looking for 1'
1 Reply]
 Category:
Coils
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| GE Signa - 17,18,19 Phantoms Found looking for 1 |
Getting this message on specific coils (CTL) 17,18,19 phantoms found looking for 1. Message never seen before and not sure if coils issue
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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
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| 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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Gina Key
Sat. 27 Jan.24,
09:33
[Reply (1 of 2) to:
'IDEAL sequence help'
started by: 'gianluca turcatel'
on Mon. 10 Jan.22]
Category:
General
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| IDEAL sequence help |
To calculate the Proton Density Fat Fraction (PDFF) from MRI images of the liver acquired using LMS IDEAL (Iterative Decomposition of Water and Fat with Echo Asymmetry and Least Squares Estimation) with optimized low flip angles, you'll typically have multiple image sets corresponding to different echoes. The fat and water signals are separated based on their chemical shift differences. Look for image sets labeled as Water, Fat, or PDFF (Proton Density Fat Fraction). Depending on the software or DICOM tags used, the images may be explicitly labeled, or you may need to review the sequence parameters to determine which set corresponds to fat or water.
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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
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| 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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