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MRI is trending to low field magnets :
reduced costs will lead to this change 
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only in remote areas 
is only temporary 
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Dan Barrieau

Wed. 20 Jun.07,
11:47

[Start of:
'Mechanical Ventilator outside of Scan room'
3 Replies]

 
  Category: 
Site Planning and Specifications
 
Mechanical Ventilator outside of Scan room
I recently visited a site where a patient on mechanical ventilation from ICU was having an MRI. The ventilator and IV pumps were located outside the room with the tubing running through two sleeves in the wall (brass or other non-ferrous sleeve) to the patient.

Is this common? Is this safe? Are their problems associated with this?

sorry if I sound ignorant, I am not an MRI tech.
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Gonzalo Sanchez Benavides

Tue. 5 Jun.07,
07:53

[Start of:
'DTI 25 directions on GE signa excite 1.5'
4 Replies]

 
  Category: 
Sequences and Imaging Parameters
 
DTI 25 directions on GE signa excite 1.5
Hello,

I need some help with the DTI 25 gradient directions on GE signa excite.
I'm a neuropsychology researcher and i receive some data with this protocol, but the technician cannot tell me the matrix that i need to process it. It's somthing like this:

26
0 0 0
1 0 1
...

If anybody can help me i would be very grateful.

Thanks
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Anne Nelson

Tue. 8 May.07,
02:09

[Start of:
'Proton Density and FOV'
2 Replies]

 
  Category: 
Sequences and Imaging Parameters
 
Proton Density and FOV
I've been told that proton density sequences don't work well with a large field of view. (approx 350-400) Is this the case, and why?

Thanks in advance,

Annika
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Reader Mail

Sun. 6 May.07,
17:28

[Start of:
'OVS & phase refocussing'
0 Reply]

 
  Category: 
Sequences and Imaging Parameters
 
OVS & phase refocussing
Why do we need to rephase spins in outer-volume regions after their excitation, still applying a crusher gradient afterward? Is this not too much work, rephasing and then dephasing them?
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Mike Parks

Fri. 6 Apr.07,
18:53

[Start of:
'Need Help'
0 Reply]

 
  Category: 
Applications and Examinations
 
Need Help
I had an MRI yesterday and I have alot of metal in my neck due to extensive surgery such as anterior fusion from c4 to c7. Yesterdays results indicate I have atrophy of the spinal cord from C4-5 to C7 with a thin cord and high signal compatible with myelomalacia. Herniation of C3-$ that compresses the spinal cord. Central protrusion of the C2-3 and C7-T1 discs. My question is. My neck burns as if on fire inside. Is this something that will go away? I have and do have severe pain 24/7 but I've never had this kind of pain. If possible please email me at oceansmove07@aol.com if you know what's happening. Thank you for any help you may have and I wish everyone a lighter today, a brighter tomorrow and a future filled with joy and happiness.
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