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MRI is trending to low field magnets :
reduced costs will lead to this change 
AI will close the gap to high field 
only in remote areas 
is only temporary 
never 
 
MRI Forum
'Coil'
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Arash Dabirzadeh

Sun. 16 Nov.08,
20:20

[Start of:
'RF engineer seeking job'
0 Reply]

 
  Category: 
Jobs
 
RF engineer seeking job
can you give me a list of RF coil companies/labs in the US?
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Reader Mail

Sun. 5 Oct.08,
03:48

[Start of:
'gradient preemphasis'
0 Reply]

 
  Category: 
Equipment
 
gradient preemphasis
Is the gradient preemphasis still used in the up-to-date MRI scanner equipped with the shielded gradient coil? Does the preemphasis become unnecessary in the future, or is it continued to be used?
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John Jackson

Fri. 12 Sep.08,
08:40

[Reply (1 of 2) to:
'flow arifact'
started by: 'Neeta Vyas'
on Tue. 9 Sep.08]

 
  Category: 
Artifacts
 
flow arifact
I wonder if it has anything to do with the placement (location) of the wrist within the scanner. Assuming that your using the scanners coil as a reciever- Are you scanning close to the edge of the scanner? The sat band also has to be within the FOV/limits of the scanner.

I suggest trying different locations in the scanner (or using a smaller FOV). It would be strange if you had artefacts in some writs and not in others.
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werginn carvajal

Wed. 30 Jul.08,
01:41

[Reply (1 of 2) to:
'coils for leg'
started by: 'israa sadiq'
on Sat. 19 Jul.08]

 
  Category: 
Applications and Examinations
 
coils for leg
no you need to use flex coil i think you have
a profile 0.2 g.e

werginn carvajal rt armrit
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Rud Spring

Fri. 7 Apr.06,
21:08

[Reply (1 of 2) to:
'SAR, Magnetic field and exitation frequency'
started by: 'I L'
on Wed. 12 Oct.05]

 
  Category: 
Basics and Physics
 
SAR, Magnetic field and exitation frequency
At two times the field-strength you need four times more RF power. (If you keep the duration of the pulse the same...)

But the exact amount of RF power depends on many more system components. Usually 3T transmit coils are shorter compared to 1.5T, such that less than four times the RF power is needed...
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