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| Result: Searchterm 'tr'
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Arnold Somereville
Sun. 23 Apr.17,
18:06
[Start of:
'GE 8 channel Body Coil Artifact'
2 Replies]
 Category:
Artifacts
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| GE 8 channel Body Coil Artifact |
Have a GE 1.5T HDxt. Problem: experiencing symmetric artifacts in abdominal images. Artifact seen in most anterior images: Some are rectangular in appearance, another reminds me of a plastic knife. All patients are changed in gowns/pants prior to entry into MRI suite. The body coil in question has been changed 3 times but the artifact remains. I suspect this is a hardware reconstruction issue, however, the engineer thinks it is operator error. I have run this sequence with and without options. This is an SSFSE, breath hold sequence. Has anyone encountered this issue?
 MRI Abdomen 8 channel body coil
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tracie smith
Thu. 8 Dec.16,
16:11
[Reply (20 of 21) to:
'MRI registry equations'
started by: 'Donna Nusser'
on Tue. 18 Aug.09]
Category:
Basics and Physics
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| MRI registry equations |
Hi i saw your post to this forum and i am studying for the MRI registry as well. I have taken it twice and scored a 74 last time. This is my final attempt and i saw threads with people sharing info and study guides. I wasn't sure how to post to the main forum but if you could repost this to the main forum that would be appreciated so much. if anyone can email any information or study test etc. I am so nervous being my third attempt and ive been out of school so long lol My job is on the line if I dont pass. Ive been studying MRI in Practice hopefully that will help but I just wanted to leave my email address traciem218@gmail.com if anyone has any study hints ect. please send them Im in desperate need to pass this. I hope yours went well if you've taken it yet. Thanks in advance for any infornTraciern
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Desiree Dupuy
Sat. 3 Dec.16,
22:14
[Reply (2 of 3) to:
'Muscle shading in 3T Images'
started by: 'Travis Conley'
on Thu. 21 Oct.10]
Category:
Applications and Examinations
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| Muscle shading in 3T Images |
Try running a B1 Map followed by Calibration. Set RF Drive mode to Optimized. This is supposed to optimize for your Patient. Supposed to reduce dielectric effect/shading for Lumbar and Abdomen.
You can find under GE Additional Abdomen Sequences.
Or you can run Ideal with Dixon technique. Turn on IN phase will give you T1 FS & IN Phase is you plane T1. I believe this takes care of the artifact.
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Martin Rosellen
Wed. 19 Oct.16,
15:30
[Start of:
'k space explanation'
2 Replies]
Category:
General
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| k space explanation |
dear all,
I am trying to get a feel for what k-space is. So far I have not got an explanation that I understand. My idea to picture the frequencies that get emmitted from a slice as follows: - We have a box filled with still waterrn - a set of objects get dropped into the water simultaneously - every object emmits waves that are specific to its shape. To fill k space, what is measured and how? All I know is that the sampling frequency stays the same. Sorry for the ugly formatting. Did not find help on that. Thanks Martin
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Cristobal Bertoglio
Mon. 1 Aug.16,
21:59
[Start of:
'PCMRI'
0 Reply]
Category:
General
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| PCMRI |
Hi everybody
I am curious to understand a bit better what the formula that it is used in PCMRI for relating the change of phase and the velocity assume ...
As far I have unterstand that it is assumed the phase of a moving particle can be measured at two time instants, i am right? Does this not assume we can "track" the particle? Does this not "contradict" the fact that we can only compare phases that we measure at the same fixed place?
Thanks,
C.
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