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| Result: Searchterm 'epi'
found in 15 messages |
| Result Pages: [1] 2 3 |
More Results:  Database (85) News Service (35) Resources (6) |
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sivagami samy
Thu. 26 Nov.09,
13:31
[Start of:
'EPILEPSY -MRI'
2 Replies]
 Category:
Applications and Examinations
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| EPILEPSY -MRI |
sir/ Madam,
i am m.phil student, today only i register here. i need one help. i need brain MRI image of the patients who affected by epilepsy. i need lot of images or my research. So anybody help me how to get those images.. if you have the images please send me. it will help me a lot.. i expect a good result from this forum members.i feel very happy to join in this site. waiting for reply...
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Will B
Thu. 23 Oct.08,
06:47
[Start of:
'Mobile MRI - Keeping Magnet Cold'
4 Replies]
Category:
Devices, Scanner, Machines
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| Mobile MRI - Keeping Magnet Cold |
Hello,
I'm new to the MRI modality; I've mostly worked with CT over the years.
Something donned on me today, regarding mobile MRI's. How is the magnet kept from going warm while in transport?
Thanks,
Will
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Math G
Fri. 30 Jun.17,
21:02
[Reply (10 of 12) to:
'90 excitation pulse vs 180 inversion pulse'
started by: 'Bjorn Redfors'
on Sat. 27 Jun.09]
Category:
Basics and Physics
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| 90 excitation pulse vs 180 inversion pulse |
I will try an answer to this rather old tread, in case someone stumble upon this like me.
The phenomenon of "coherence" that produce transverse magnetization after a 90 RF pulse cannot be answered by classical mechanics, or any simple model that represents individual protons as precessing magnets in either the parallel/antiparallel direction with regards to the MRI magnetic field.
Rather, it is a phenomenon related to quantum mechanics and the effect of a RF field on a interacting group of particles with spins (not necessarily oriented as parallel/antiparallel, I might add, even under the effect of a magnetic field).
The simplest depiction, as I understand, would be to imagine a group of spins as literally rotating as a whole under the effect of the RF. After a certain time (corresponding to a 90 degree pulse), the net magnetization that was oriented parallel to the MRI magnetic field, is now oriented in the transverse plane, causing transverse magnetization and signal. If you further apply RF, the system will continue to rotate, shifting gradually toward an antiparralel orientation, losing transverse magnetization in the process.
Hope its clearer!
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Jason Gordon
Wed. 13 Apr.16,
14:17
[Start of:
'Est. SAR vs. Peak SAR?'
0 Reply]
Category:
General
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| Est. SAR vs. Peak SAR? |
If an implant is MR Conditional with a manufacturer's recommendation that SAR be kept less than or equal to 2.0W/kg, does that mean that I should be looking at the Est. SAR or the Peak SAR and keeping it under 2.0W/kg?
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ajfreshh20 keaton
Mon. 30 Apr.12,
22:17
[Reply (1 of 3) to:
'Deaf MRI technicians?'
started by: 'Nicole Marsh'
on Thu. 5 Apr.12]
Category:
General
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| Deaf MRI technicians? |
Hi! Working as an MRI Technologist requires a lot of talking to the patient. You must screen the patients yourself, talk to them in between pulse sequences to ensure they are doing alright, and during breath hold exams. There is a huge safety factor with MRI with keeping certain metals away from the magnet so screening each and every person is a huge factor with being a MRI Technologist. As a MRI Technologist for a mobile company i speak with a radiologist that works at another facility for protocols and questions regarding exams and ensuring we get everything the patient and ordering doctor needs. If you have a MRI school in your area i would email or call them to see if any accomodations could be made, but i know from working mobile and at surrounding hospitals in this state and nearby states i live in, you would need to speak to the patient.
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