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| Result: Searchterm 'Bo'
found in 285 messages |
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More Results:  Database (490) News Service (696) Resources (204) |
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Tanya Vi
Sat. 18 Feb.12,
15:33
[Reply (1 of 2) to:
'Looking to Become Licensed/Credentialed'
started by: 'Jack McIntire'
on Tue. 1 Nov.11]
 Category:
Reimbursements and Costs
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| Looking to Become Licensed/Credentialed |
Hello to everyone,
I would like to ask what is the best way for foreign Radiology Technologist to work in USA? I am interested in MRI field and I am currently work on MRI,CT,Mammography and X-ray in private clinic in Bulgaria. I have obtained Bachelor Degree in 2004 with tree years training course.
My question is what I have to do if I want to work in USA?
Is anybody who has an experience with that?
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|  View the whole thread | | |
Tetiana Dadakova
Fri. 17 Feb.12,
10:07
[Reply (1 of 2) to:
'MR750: ASSET Artifact or 32 Channel coil?'
started by: 'Reader Mail'
on Tue. 26 Jul.11]
Category:
Funktional MRI
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| MR750: ASSET Artifact or 32 Channel coil? |
Hi,
We do have the same artifact on the same scanner with 32 channel coil. I was thinking about herringbone artifact as well first, but then some kind of "spikes" of very high or low intensity should be seen in k-space, which I don't see in our images. We have this artifact only for DTI.
If you find out what it is, please let me know.
Best regards.
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| | View the whole thread | | |
Steven Ford
Tue. 31 Jan.12,
08:19
[Reply (1 of 2) to:
'RF shimming'
started by: 'Reader Mail'
on Thu. 1 Oct.09]
Category:
Basics and Physics
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| RF shimming |
For Magnetic fields, the overall field is adjusted to push it up a little bit in one spot and push it down a little bit in another area. The goal is to create a field that's perfectly homogenous.
The RF field created by the transmit coil likewise must be as homogenous as possible, so that the flip angle is constant throughout the imaging volume. In the past, designers have solved this problem by building coils such as the 'birdcage' style that would create a very even amount of energy inside. This is one reason why the transmit coils tend to be large.
With the advent of 3 Tesla and stronger magnets, the RF resonant frequency also rises. RF energy absorbed in the patient rises with the higher frequencies also, and another problem raises its head: it's a lot harder to make a very homogenous RF field. Even if you are scanning phantoms, the inside tends to be subject to different energy than the edges.
But in the human body, there are all sorts of irregular lumps and bumps that absorb RF differently, further complicating matters.
Now, on modern scanners it's possible to perform a magnetic field shim with the patient actually in the magnet in order to compensate for minute changes in the magnet from one exam to another. For super-high field magnets, an RF shim is also a handy thing to do.
If you have a Multi element RF transmit coil (regular phased array coils are just for receiving) you can run a program which selectively turns up the power in some elements so that the overall signal received is maximized. That's an RF shim.
Steven Ford
Professional Imaging Services, Inc.
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| | View the whole thread | | |
Pete Griffith
Mon. 23 Jan.12,
02:15
[Reply (1 of 2) to:
'Hibiscus tea as a negative oral contrast'
started by: 'James McCleery'
on Tue. 17 Feb.09]
Category:
Contrast Agents
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| Hibiscus tea as a negative oral contrast |
Has anyone tried this or Might know anything more information about it? Thanks.
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| | View the whole thread | | |
Michael Torres
Sun. 22 Jan.12,
10:08
[Reply (1 of 10) to:
'ARMRIT in California?'
started by: 'James Benitez'
on Wed. 4 Jan.12]
Category:
Organisations
|
| ARMRIT in California? |
I was reading you thread and caught my attention, I am currently enrolled in a MRI school, and am very close to going to my extern which is going to be in los angeles, but now that I read you message I am very worried since I'm going to school I get armrit cert. I would like to k ow more about what you are talking about
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