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| Result: Searchterm 'sequence'
found in 105 messages |
| Result Pages: 1 2 3 4 5 [6] 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 |
More Results:  Database (378) News Service (28) Resources (10) |
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Renate S.
Sat. 6 Jun.15,
13:18
[Reply (1 of 2) to:
'is this kind of zebra artifact?'
started by: 'luna xu'
on Fri. 5 Jun.15]
 Category:
Artifacts
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| is this kind of zebra artifact? |
Looks more like a Zipper artifact. Can be caused by electronic noise. Switch off all light bulbs, remove all electronic equipment from the scanner room, make sure that the door is really closed (clean the contacts between door and jam if necessary) and try again. If the artifact consists control the penetration panel where the cables enter the room and the faraday cage, it is possible that there is a leak in the RF shield. If the artifact remains with all coils and sequences you need the service to repair the problem.
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|  View the whole thread | | |
Steven Ford
Tue. 5 Aug.14,
20:01
[Reply (1 of 2) to:
'?'
started by: 'Belinda Williams'
on Mon. 21 Jul.14]
Category:
Coils
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| ? |
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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Belinda Williams
Mon. 21 Jul.14,
21:44
[Start of:
'?'
1 Reply]
Category:
Coils
|
| ? |
I work on GE excite open speed. On lumbar spine t2 axials, it appears like the coil looses signal and makes image dark and grainy. The coil gives good signal on the other sequences and tests good when engineer has tested it. The sag t2 is bright like it should but ax is dark. Any ideas why?
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Daniel Cronk
Mon. 16 Jun.14,
20:25
[Start of:
'MRI artifact'
3 Replies]
Category:
Artifacts
|
| MRI artifact |
Hi. I have recently been experiencing an artifact on a STIR sequence (GE Signa HDxT 3.0T) using a HD CTL spine Coil. I'm am not fully understanding what could be happening here. One MRI technologist thought it was a corduroy artifact due to RF leak, but I'm not 100% sure there was RF leak, at least from the door, as it was closed completely.
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Rob Wilson
Sat. 24 May.14,
07:48
[Start of:
'new job in MRI'
0 Reply]
Category:
Jobs
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| new job in MRI |
Hello, I have happily accepted a job working in MRI and CT having worked in just CT. I have a few months until I start and was wondering if anyone could recommend a few good books regarding basic physics and pulse sequences to get me started :) I will be working in a hospital with alot of cardiac work using seimans MRI scanners many thanks, Rob :)
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