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| Result: Searchterm 'Phantom'
found in 8 messages |
| Result Pages: [1] 2 |
More Results:  Database (5) News Service (3) Resources (1) |
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Kimberly Wilridge
Fri. 26 Jul.13,
16:42
[Start of:
'GE Signa - 17,18,19 Phantoms Found looking for 1'
1 Reply]
 Category:
Coils
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| GE Signa - 17,18,19 Phantoms Found looking for 1 |
Getting this message on specific coils (CTL) 17,18,19 phantoms found looking for 1. Message never seen before and not sure if coils issue
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proton spin
Sat. 11 Feb.12,
08:54
[Start of:
'Silicon oil for large phantom'
0 Reply]
Category:
Artifacts
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| Silicon oil for large phantom |
Hello
I want to buy silicon oil for a large MRI phantom. What kind of oil is needed, with what degree of viscosity?
Best regards
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Kimberly Wilridge
Wed. 27 Sep.23,
19:37
[Reply (1 of 2) to:
'GE Signa - 17,18,19 Phantoms Found looking for 1'
started by: 'Kimberly Wilridge'
on Fri. 26 Jul.13]
Category:
Coils
|
| GE Signa - 17,18,19 Phantoms Found looking for 1 |
I submitted this question years ago. Answer to this question and anyone else with an issue in SNR testing is: it was the phantom. GE coils as with all coils have SET phantoms that should be used due to the system programming. It looks for the gaps/spaces between the phantom balls, blocks, etc. At that time of question above the FE doing the testing was using USAI phantoms (which are large blocks) and GE CTL phantoms are small/mid size balls contained in an acrylic piece. After complete rebuild of 25 CTL's figured I got bench testing these things down to a science, with T1/T2 values higher than OEM. I can thank that FE, because it made me improve my reverse engineering skills, which I've applied to so much since then.
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marc jupin
Thu. 26 Mar.15,
09:03
[Start of:
'receiver gain in siemens trio'
0 Reply]
Category:
Sequences and Imaging Parameters
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| receiver gain in siemens trio |
Hi, we measured a phantom with two receiver gain option: LOW and HIGH (available from parameters).
We would like to calculate the difference in signal intensity, but unfortunately the rda files headers do not contain any information about the receiver gain value.
Does anyone have a clue how I could find the receiver gain value?
Thanks.
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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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