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| Result: Searchterm 'Magnet'
found in 87 messages |
| Result Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 [14] 15 16 17 18 |
More Results:  Database (669) News Service (897) Resources (213) |
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Patricia Burns
Fri. 24 Oct.08,
13:17
[Reply (1 of 5) to:
'Mobile MRI - Keeping Magnet Cold'
started by: 'Will B'
on Thu. 23 Oct.08]
 Category:
Devices, Scanner, Machines
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| Mobile MRI - Keeping Magnet Cold |
Will,
When a mobile MRI Scanner is in motion going from site to site a "ramp down" is performed before moving.This is when the magnetic field is lowered but not completely shut off. The field still keeps it's integrity due to the Cryogens that surround it. When it comes to the new site, a "ramp up" is performed to bring the magnetic strength back up to par. Bottom line...The Cryogens are not boiled off and keep the magnet cold when it is motion. If the magnet were to suddenly lose it's power, it could be due to a cryogen boil off.
p.burns
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|  View the whole thread | | |
John Jackson
Fri. 12 Sep.08,
08:48
[Reply (1 of 3) to:
'Regarding recovery and decay [basic phycisc]'
started by: 'harry sanders'
on Sat. 7 Jun.08]
Category:
Basics and Physics
|
| Regarding recovery and decay [basic phycisc] |
Hi,
I'm not so sure but I think because different physical process are being involved. Longitudal relaxation has got something to do with energy exchange to the environment. Transverse relation occurs because of spin dephasing (magnetic inhomogenity.)
John
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| | View the whole thread | | |
John Muller
Fri. 12 Sep.08,
00:02
[Reply (2 of 3) to:
'Geometric distortion'
started by: 'ergun ahunbay'
on Tue. 2 Jan.07]
Category:
Artifacts
|
| Geometric distortion |
You can find more information about magnetic field in: http://www.youtube.com/watch?v=evfUTmx0uh8&feature=related
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| | View the whole thread | | |
harry sanders
Sat. 7 Jun.08,
12:59
[Start of:
'Regarding recovery and decay [basic phycisc]'
2 Replies]
Category:
Basics and Physics
|
| Regarding recovery and decay [basic phycisc] |
Hi there,
I'm studying on some basic MRI physics. And my study book tells me when the RF pulse has been switched of the amount of magnetisation in the longitudinal plane increases and at the same time but idependently the amount of magnetisation in the transverse plane decreases. I was wondering if some one could explain to me why these 2 parameters do not have an influence on eachother. It seems way more logic to me that the recovery of longitudinal plane is because of the decrease of transverse plane. Sorry for my bad english and I hope some one could give me an explanation!
Yours,
Harry
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Neeta Vyas
Wed. 2 Apr.08,
04:30
[Start of:
'Job Opportunities'
1 Reply]
Category:
Jobs
|
| Job Opportunities |
Hi,
Currently I am working as on-call MRI Technologist in southern California. My work experience consists of around one year working on Hitachi AIRIS II, Hitachi AIRIS Elite and Siemens MAGNETOM Concerto.Also I am ARMRIT certified and have valid CPR and IV injection certificate.
I need to relocate to Michigan (Troy area) or Chicago (Aurora area). These days I am applying on-line, If somebody knows any opportunity available in these areas, please let me know. This will expedite my relocation.
Thank You.
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