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| Result: Searchterm 'HIS'
found in 303 messages |
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More Results:  Database (430) News Service (375) Resources (57) |
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jung kang
Fri. 29 Dec.23,
02:10
[Start of:
'Chronic insufficiency of the PCL is suspected.'
0 Reply]
 Category:
Funktional MRI
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| Chronic insufficiency of the PCL is suspected. |
Hello,
I'm experiencing a specific issue with my knee and would appreciate any insights. When I straighten my knee, I feel a friction sensation at the junction of the tibia behind the knee. This sensation of friction is very close to the area of pain, which seems to be deep and difficult to pinpoint accurately.
Here's a summary of my medical reports and symptoms:
First MRI Report Findings:
Chronic damage to the posterior cruciate ligament.
Patellofemoral wear and tear.
I suspect these findings are related to my symptoms.
Additional Information:
A CT scan showed swelling in the anterior cruciate ligament.
Pain Description:
The pain starts from the middle of the knee joint and gradually spreads to the right popliteal fossa (back of the knee).
I experience this pain continuously for 24 hours.
Other Symptoms:
Along with the onset of these symptoms, I've noticed an unusually large amount of hair loss, which I suspect might be due to ongoing inflammation.
I'm seeking advice or insights from anyone who might have had similar experiences or from medical professionals who can shed some light on these symptoms and the MRI findings.
Thank you in advance for your help!
2023
- https://www.dicomlibrary.com/meddream/?study=1.3.6.1.4.1.44316.6.102.1.202312232236683.4754602657439816271065
2021
- https://www.dicomlibrary.com/meddream/?study=1.3.6.1.4.1.44316.6.102.1.20231225201235919.34251024914768354353
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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
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| 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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Brian Smith
Wed. 16 Nov.22,
12:35
[Reply (2 of 3) to:
'backproblems -- mrt'
started by: 'max messerschmidt'
on Fri. 28 Oct.22]
Category:
General
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| backproblems -- mrt |
History behind the pain? Trauma? Where is it located? Typically Sagittal imaging is preferred to diagnose spinal problems.
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Brian Smith
Wed. 16 Nov.22,
12:33
[Start of:
'Siemens Espree Help'
1 Reply]
Category:
Protocols
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| Siemens Espree Help |
Hello all. My facility switched from Siemens Espree 1.5T to Philips Ingenia 1.5T a year ago. I recently picked up a second job at a small imaging facility. I have forgot almost everything about this machine and the protocols saved on the machine are horrific! The full time tech that works there is green and doesn't know what can and can't be changed.
Does anyone have any protocol information for this machine? I just don't have the time to rebuild all these protocols and am looking for a good base or some that a tech has tuned to their liking. Any help is greatly appreciated!
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Herbert Müller
Thu. 5 May.22,
01:33
[Reply (11 of 12) to:
'90 excitation pulse vs 180 inversion pulse'
started by: 'Bjorn Redfors'
on Sat. 27 Jun.09]
Category:
Basics and Physics
|
| 90 excitation pulse vs 180 inversion pulse |
Hello,
I dont know if anyone has, for him/herself, answered this question. I know it is an old thread. But this is the question which also botheres me the most in NMR/MRI.
I refer now to a picture, which is illustrated in the book from Tim Claridge (High resolution NMR techniques).
Here, a RF pulse (lets say a 90 degree pulse) is said to have two effects on the initial z-magnetisation. First, it allows energy transfer between the two Zeeman-states in a way, that i equalizes the population difference between them. So there is no z- magnetisation anymore after 90 degree pulse. Th esecond effect is, that it induces phase-coherence. And this phase coherence is then responsible for the x-magnetisation, which is measured.
And now I have the same question. Why is this phase coherence lost (or is it not?), when applying an initial 180-degree pulse. Understandable for me is, why the population difference in z is reversed, but I dont understand, why there is no xy magnetisation anymore.
Maybe some of you have figured out the answer in the meantime?
Greetings
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