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In 2020 your scanner will probably work with a field strength of :
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MRI Forum
'Fat Suppression'
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Result: Searchterm 'Fat Suppression' found in 6 messages
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Peter Jefferson

Tue. 24 Jan.12,
21:33

[Reply (1 of 7) to:
'Imaging optic neuritis'
started by: 'Karen Lesley'
on Wed. 18 Jan.12]


 
  Category: 
General

 
Imaging optic neuritis
A coronal STIR or T2 weighted sequence with fat suppression is useful to show an opticus neuritis.
 View the whole thread
Steven Ford

Mon. 7 Mar.11,
15:24

[Reply (4 of 8) to:
'6-1.5T MAGNETS, DIFFERING GRADIENTS'
started by: 'Elise Gough'
on Wed. 23 Feb.11]


 
  Category: 
Applications and Examinations

 
6-1.5T MAGNETS, DIFFERING GRADIENTS
If some of the system are signal starved, it's most likely not due to gradient field strength and speed, but it can be related to that. Like everything else in MRI, it's complex and interdependent.

You're best advised to talk with the apps specialist from the systems that are under-performing, and learn from them what the bandwidth is, and also check the shim. Is the fat suppression OK, but the signal weak, or is the suppression bad also? Do you get a graphic output of the linear (gradient)shim corrrection on the various systems?


It is well worth the money that they might charge, if it comes to that, in order to optimize the use of the systems and for your own education. If the apps person does not know why the other machine works so well, there should be someone higher up in the organization who can shed some light on your question.
 View the whole thread
Mary York

Wed. 7 Jan.09,
19:22

[Reply (1 of 2) to:
'Best Sequence for Ulnar Collateral Ligament'
started by: 'Sam Shelly'
on Mon. 10 Nov.08]


 
  Category: 
Sequences and Imaging Parameters

 
Best Sequence for Ulnar Collateral Ligament
2D or 3D T2* is a good choice. Depending on the machine, also proton density with fat suppression works well.
 View the whole thread
Jenny Jordan

Mon. 14 May.07,
07:24

[Reply (1 of 3) to:
'Proton Density and FOV'
started by: 'Anne Nelson'
on Tue. 8 May.07]


 
  Category: 
Sequences and Imaging Parameters

 
Proton Density and FOV
Proton Density is often used for musculoskeletal exams with small FOVs. I know no reason why it should not work with a large FOV.
I use PD with fat suppression also for both hips with a FOV of 380 and it works.
 View the whole thread
Renate Bloemer

Mon. 13 Nov.06,
19:46

[Reply (1 of 3) to:
'MRA'
started by: 'Marco Costa'
on Sun. 22 Oct.06]


 
  Category: 
Protocols

 
MRA
A test bolus helps to get the delay at which time the CE-MRA sequence has to be started. The sequence needed is a one-slice dynamic fast gradient echo sequence (if possible with fat suppression or subtraction) and a temporal resolution of 0.5 to 1.5 sec. This thick slice is placed over the vessel of interest and the dynamic is started simultaneous with a small (1-2ml) bolus of Gad.
In the follow up you can see at which time the bolus is visible. If it is not clear to differentiate, a ROI measurement will help. The starting time depends on the k-space filling. Around the peak of the highest intensity, the contrast information should be read out (with "centric" at the beginning of the sequence).
Centric k-space filling order means that the central lines of the k-space are filled in the first seconds after starting the scan. Depending on the equipment, there is more than one non-centric order, for example linear, where the central lines are filled in the middle of the scan time.
Hope this helps.
 
 

Renate Bloemer
 View the whole thread

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