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| Result: Searchterm 'Real'
found in 40 messages |
| Result Pages: 1 [2] 3 4 5 6 7 8 |
More Results:  Database (47) News Service (47) Resources (9) |
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Steven Ford
Tue. 5 Aug.14,
20:01
[Reply (1 of 2) to:
'?'
started by: 'Belinda Williams'
on Mon. 21 Jul.14]
 Category:
Coils
|
| ? |
Belinda,
It would be helpful if you would add a photo, even if you take a cellphone photo of your screen and blot out the name.
You did not say, but is this a new problem?
In general, if one orientation looks worse than others, you may have a magnet shim problem; you can crudely test this yourself by using a cylinder type phantom and doing an identical scan in three planes. A shim problem would affect T2's more than T1 or PD images also.
There is always a possibility that your sequences have changed without you realizing it too; check this even if you don't know how that would have happened.
Steven Ford
Professional Imaging Services, Inc.
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|  View the whole thread | | |
Glenn wathern
Wed. 9 Oct.13,
16:47
[Reply (8 of 10) to:
'ARMRIT in California?'
started by: 'James Benitez'
on Wed. 4 Jan.12]
Category:
Organisations
|
| ARMRIT in California? |
If one looks into the two, ARRT and ARMRIT, one will find ARRT approved schools are generally associated with four year colleges and ARMRIT schools are generally associated vocational medical colleges. As for the ability to cross train or get both certifications that is really not a reality. I talked to a person at ARRT and was told in order to become certified by them a MRI tec must have attended an ARRT approved school. Twenty years of MRI experience wouldn't get you in the door, her words. And like wise ARMRIT certification is earned from attending an ARMRIT approved school. For those who can not find a job, I would be curious as to how far they were willing to go to find work. I would also question his or her employability. Some people want to be singers, some want to be actors. If one doesn't posses the characteristics an employer is looking for then he or she will not get hired. Those being the communication, and interpersonal skills needed to fit in to the work place. Posting pictures in yellow and black face and using derogatory terms to describe organizations doesn't bode well for ones character. I have found the starting pay is about the same. Possessing a four year degree seems to be the only way to get the supervisor and head of department jobs, which do pay more obviously. Obtaining a degree on line or by attending a school while working can fix the problem of apparent income disparity. There are jobs out there if a person is willing to relocate and for his or her chosen profession. Jobs are not always going to be available where you are planted. Be willing to move for a job and look at the experience as an adventure and a new chapter in your life.
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| | View the whole thread | | |
Giselle Perdigonz
Mon. 23 Sep.13,
07:58
[Reply (2 of 4) to:
'2013 registry'
started by: 'Reader Mail'
on Thu. 19 Sep.13]
Category:
Basics and Physics
|
| 2013 registry |
Is the MIC really accurate ?!!!! just asking lol
Tips?!
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| | View the whole thread | | |
big a
Thu. 19 Sep.13,
07:58
[Reply (2 of 3) to:
'why there is T2* but not T1*'
started by: 'Isa Toni Toni'
on Wed. 24 Jul.13]
Category:
Sequences and Imaging Parameters
|
| why there is T2* but not T1* |
i just reread your question and realize what you are saying, i was told we dont use a t1* becuase generally a t1 sequence isnt a pathological sequence unless it is post contrast.
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| | View the whole thread | | |
Barry Ng
Wed. 10 Jul.13,
17:10
[Start of:
'Titanium & MRI Safety'
2 Replies]
Category:
Safety
|
| Titanium & MRI Safety |
I am trying to understand why titanium is considered "MRI Safe".
I see three potential problems when considering the MRI safety of a material:
1 - If it is a ferromagnetic material extreme damaging forces will be applied to the material if exposed to a very strong magnetic field. Titanium is not a magnetic material so I do not see this as a problem.
2 - When a relatively large flat conductor (e.g. a titanium plate) is exposed to a changing magnetic field (Faraday's law) eddy currents will be created internally as the result of induced voltages. These eddy currents can be very high and cause resistive heating ("I squared R losses"). I would think these eddy currents would have the potential to cause extreme heating of the titanium. I know from experience this does occur with steel and titanium has a conductivity about the same as steel. Titanium is not magnetic as is steel but induced voltages due not require a ferromagnetic material (.e.g. copper as used in real world generators, etc.).
3 - Induced voltages are created across the length of a conductor as the result of the conductor being exposed to a changing magnetic field ("genrator effect" - Faraday's Law). Again this effect does not require a magnetic material. So why, at best, does this effect not have the potential to be uncomfortable or even very painful to the MRI patient being exposed to a huge changing magnetic field?
Invariably the response to why titanium is safe focuses on the fact that it is not magnetic. I get the deer in the headlight look when I ask about eddy current heating and induced voltages.
Please help me understand why unduced eddy current heating and induce voltages are not a concern.
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