|
Magnetic
Resonance -
Technology
Information
Portal |
Welcome to MRI Technology • |
|
|
 | Info
Sheets |
| | | | | | | | | | | | | | | | | | | | | | | | |
 | Out-
side |
| | | | |
|
| | | | | |
| Result: Searchterm 'sequence'
found in 106 messages |
| Result Pages: 1 2 3 4 5 [6] 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 |
More Results:  Database (378) News Service (28) Resources (10) |
|
|
Renate S.
Thu. 5 May.16,
14:27
[Reply (1 of 2) to:
'Contrast on an 3T'
started by: 'Roos van Wieringen'
on Mon. 2 May.16]
 Category:
General
|
| Contrast on an 3T |
Studies (for example http://pubs.rsna.org/doi/full/10.1148/radiol.2373041672 , http://pubs.rsna.org/doi/full/10.1148/rg.287075154 ) suggest that contrast enhancement of gadolinium is increased at higher field strengths. That can be used to lower the dose or receive higher contrast effects. It also depends on the contrast sensitivity of the used sequences and the examined body part.
|
|  View the whole thread | | |
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
|
| 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.
|
| | 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
|
| ? |
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.
|
| | View the whole thread | | |
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?
|
| | View the whole thread | Reply to this thread
(login or register first) | |
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.
|
| | View the whole thread | Reply to this thread
(login or register first) |
| |
| | Result Pages : 1 2 3 4 5 [6] 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | |
|
| |
 | Look
Ups |
| |
|
MR-TIP.com uses cookies! By browsing MR-TIP.com, you agree to our use of cookies. | | | [last update: 2024-02-26 03:41:00] |
|
|
bottom
top
