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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 




 
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Reader Mail

Wed. 26 Jul.06,
11:56

[Reply (1 of 2) to:
'vibe sequences in neuro mri?'
started by: 'syam reddy'
on Wed. 25 Jan.06]


 
  Category: 
Sequences and Imaging Parameters

 
vibe sequences in neuro mri?
Vibe is a breathhold technique, so mor suitable for abdomen imaging.
mprage goes very well for post contrast brain imaging
 View the whole thread
Jennifer Jackson

Fri. 21 Jul.06,
04:44

[Reply (1 of 2) to:
'Phase encoding'
started by: 'guillaume bierry'
on Fri. 7 Jul.06]


 
  Category: 
General

 
Phase encoding
Wow this is a long subject, First you have to under stand how the 3 main gradients are used. (slice select, Freq, then phase)
So you are use 1 of the gradients for your phase encoding. You need to fill the k-space which depends on you matrix. Lets assume you are using 256 (phase). In order to fill K-space you have to have 256 aquistions of the signal. Meaning for each picture (or slice) the signal must be acquire(sampled) 256 times each at a differnt amplitude to put it in a different Line of k-space.

Example- If you are performing a SE(spin echo) you have 1 TR period and 1 TE period (TE=is when the signal is sampled) so you will have to do the TR period 256 times to fill K-space with diffent amplitudes.

There is alot more that I left out. If this did not answer your question let me know
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David Jennions

Tue. 18 Jul.06,
10:46

[Start of:
'1.5T field contours'
0 Reply]


 
  Category: 
Devices, Scanner, Machines

 
1.5T field contours
Greetings!

I'm testing simultaneous MR and optical imaging, and need to calculate the MR field strength along the bore axis of a GE Signa HDe 1.5T. Any online references / other data that folks can point me at would be most appreciated!
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Joseph Arcoleo

Sat. 24 Jun.06,
17:55

[Reply (4 of 10) to:
'MRI Study Guide'
started by: 'Nicole DeMoss'
on Fri. 10 Mar.06]


 
  Category: 
General

 
MRI Study Guide
The BEST study guide is Medical Imaging Consultants: MRI Registry Review Program. They guarantee you will pass or your money back. I studied for 6 months and passed.
 View the whole thread
Bear DuDu

Sun. 4 Jun.06,
09:30

[Reply (1 of 3) to:
'ZIP512'
started by: 'Shaun Schofield'
on Thu. 30 Mar.06]


 
  Category: 
Sequences and Imaging Parameters

 
ZIP512
when you use low matrix (lower than 256x256), you may use zip512 to increase the display resolution of image.

if the matrix is larger than 256x256, the system automatically use zip512.
 View the whole thread

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