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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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Elena Brown
Fri. 22 May.09,
20:48
[Reply (1 of 2) to:
'Feridex/endorem and bone MRI'
started by: 'marta lola'
on Wed. 15 Apr.09]
 Category:
Contrast Agents
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| Feridex/endorem and bone MRI |
Some experiments with superparamagnetic contrast agents such as Feridex/Endorem with labeled cells showed a black appearance on T2 weighted sequences, which was easy to see. The less dominant T1 effect, bright on T1 weighted images was more subtle. (I found this also interesting http://www.nature.com/nm/journal/v7/n11/full/nm1101-1241.html and the article 'MR and iron magnetic nanoparticles. Imaging opportunities in preclinical and translational research' on http://www.tumorionline.it/cerca.php )
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|  View the whole thread | | |
Wolfgang Preuss
Tue. 21 Apr.09,
14:32
[Reply (3 of 4) to:
'GE LX MRI Platform?'
started by: 'Stuart Allison'
on Tue. 16 Sep.08]
Category:
Devices, Scanner, Machines
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| GE LX MRI Platform? |
LX platform was starting 1997; upgrade from 5x to LX (9.1) is the whole hardware except Magnet and table, LX was the last platform for 1.oT systems. All 1.5T and 3.0T system can be upgraded to 15x ( HDxT) platform but all magnets before LCC Magnet( starting 1998) have the limitation max. 8 channels. The upgrades from 11x to 15x have new computers plus parts of gradient cabinet and system cabinet and coils. For the new 750/450 platform it is more difficult to upgrade, kompl. new hardware.
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| | View the whole thread | | |
marta lola
Wed. 15 Apr.09,
12:11
[Start of:
'Feridex/endorem and bone MRI'
1 Reply]
Category:
Contrast Agents
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| Feridex/endorem and bone MRI |
I would like to label cells with a paramagnetic particle to see it in vivo by MRI after implantation inside a bone defect.
I am thinking on feridex/endoderm, it has contrast effect T2, predominantly negative enhacement.
Does anybody know something about this?
Will I be able to see this kind of signal by MRI? White or blak?
Thanks a lot.
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Gerald Del Castillo
Thu. 13 Nov.08,
00:47
[Reply (1 of 4) to:
'mri per diem tech'
started by: 'Reader Mail'
on Wed. 17 Sep.08]
Category:
Jobs
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| mri per diem tech |
Hi Steve....I would like to apply for this position. I am an MRI Technologist for the past 2 years, BLS certified, and IV access certified. I have Siemens open magnet experience, but I am interested learning a new magnet. Please email me information regarding about this position at gee_cast@sbcglobal.net
Thanks
Gerald
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| | View the whole thread | | |
Sam Shelly
Sun. 2 Nov.08,
23:02
[Reply (2 of 3) to:
'Regarding recovery and decay [basic phycisc]'
started by: 'harry sanders'
on Sat. 7 Jun.08]
Category:
Basics and Physics
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| Regarding recovery and decay [basic phycisc] |
Right on.
Recovery and delay are two separate physical processes like the last guy said. It had me stumped for a while when I was studying as well. But read carefully and think hard about it...
T1 recovery is the return of net magnetization into alignment with b0.
T2 decay is a totally different process and is, as the previous person said, simply loss of net magnetization in the transverse plain due to dephasing. The more electrons that are precessing in phase in the transverse plane, the stronger the NMV is in that plane. And, hence forth, when the RF pulse terminates, the influence of b0 gradually dephases the electrons in the transverse plane. As they dephase, the transverse NMV decreases accordingly, until the next pulse hits, rephasing the electrons and starting the process all over.
Hope that helps. MRI physics is hairy and boring at times. Load up on expressos to stay awake and stick with it, because studying MRI physics can be like taking a bottle of sleeping pills.
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