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| Result: Searchterm 'Spin'
found in 59 messages |
| Result Pages: 1 2 3 4 5 6 [7] 8 9 10 11 12 |
More Results:  Database (332) News Service (64) Resources (27) |
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Katelin Lyons
Fri. 27 May.11,
10:07
[Reply (1 of 4) to:
'Best pulse sequences for spinal cord demyelination?'
started by: 'Karen Lesley'
on Sat. 21 May.11]
 Category:
Applications and Examinations
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| Best pulse sequences for spinal cord demyelination? |
Small spinal cord lesions, even if clinically significant, can be due to the low sensitivity of some pulse sequences. Demyelinating lesions are better seen on STIR-FSE images, on which the number of lesions are significantly higher than on FSE, while the FSE and CSE images show approximately equal numbers of lesions.So as STIR-FSE has high sensitivity to demyelinating lesions,it can be considered quite specific and should be included in spinal MRI for assessment of suspected demyelinating disease.
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Mel Chang
Thu. 21 Oct.10,
19:26
[Reply (1 of 2) to:
'cervicla axial image t2 and t2*'
started by: 'kim jk'
on Thu. 23 Sep.10]
Category:
Applications and Examinations
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| cervicla axial image t2 and t2* |
T2* is fine to scan the intervertebral discs. T2 is the better choice to show small spinal cord lesions like MS plaques. The echo time of a T2* sequence may be not long enough to give a good differentiation between the pathology and surrounding tissue.rnDifferent 'Multi Echo Data Image Combination' (MEDIC) techniques have been developed to enhance contrast and pathology detection, if available on the scanner this type of sequence is maybe also a good choice, but due to longer scan times and artifact problems it is best for axial slices.rn
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Leak Sea
Sat. 16 Oct.10,
14:44
[Start of:
'How to fill the K-space?'
1 Reply]
Category:
Basics and Physics
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| How to fill the K-space? |
Hi,
i've been learning MRI for some weeks, and i really want to know that when we use the spin-echo sequences, how can we fill the data into K-space line by line?
i learned the steps of spatial encoding, but i need the algorithm, or the equations, or the quantitative way to fill the K-space.
thanks a lot!
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Michiel Klitsie
Wed. 2 Jun.10,
14:53
[Start of:
'Imaging of the sacral plexus'
1 Reply]
Category:
Applications and Examinations
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| Imaging of the sacral plexus |
We are students Technical Medicine from Twente University and are researching the imaging of the anatomical variation of the sacral plexus. This means the imaging of nerves in a fatty/muscle enviroment with a diameter below 1 mm.rnrnWe are interested in different MR-sequences that will show these small nerves (at the moment we came up with MP(2)Rage, STIR, normal SE T1 and DW) Does anybody can provide us why we should or shouldn't use one of these sequences. Or maybe somebody does have a better suggestion?rnrnAlso we were planning to combine spinal and abdominal coils (phased-array RF coils), does this depict the sacral plexus in a good way?rnrnWe also thought about using a 7T MRI scanner, because of the high spatial resolution. Is this a possibility or does it give to much artifacts? Or is the spatial resolution in a 3T machine enough for such small nerves?rnrnThanks in advance!
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George LoGuirato
Wed. 7 Apr.10,
13:28
[Reply (1 of 2) to:
'Proton Density Imaging'
started by: 'Jacquelyn Chiffons'
on Thu. 18 Mar.10]
Category:
Sequences and Imaging Parameters
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| Proton Density Imaging |
A Proton Density - like a T1 or T2 - is not considered anything; it is what you make it. Most all PD's are run as fast (turbo) spin echo, but many sites run a true spin echo PD on knees to evaluate the meniscus. (It's a long sequence.)
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