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| Result: Searchterm 'tr'
found in 420 messages |
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James Shingola
Fri. 15 Jul.16,
19:22
[Start of:
'What does this mri report mean'
0 Reply]
 Category:
General
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| What does this mri report mean |
Small developing vertical cleft along the radial side of the membranous TFC disc fibers, best seen on image 11 series 5. There is no evidence of contrast transit into the distal radioulnar joint. The remainder of the TFC disc is intact and grossly unremarkable.
Intact intrinsic ligaments. There is no widening of the intervals. There is no contrast in the midcarpal compartment.
Increased interstitial signal within the ECU tendon is likely due to tendinopathy and a developing longitudinal split. The remaining tendons are grossly unremarkable.
Normal caliber median and ulnar nerves.
Minimal generalized wrist osteoarthrosis with minimal to mild chondromalacia, small intraosseous cysts and minimal osteophytosis.
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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
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| 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.
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Jon Selby
Tue. 26 Apr.16,
07:57
[Start of:
'Susceptibility artifact query'
0 Reply]
Category:
General
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| Susceptibility artifact query |
As an MRI 'newbie' would someone be willing to help me with a question on magnetic susceptibility. If you have two metal implants of the same external geometrical form but one of these is hollow, would you you get the same size artifact? I'm basically wondering whether a metallic implant has a finite sphere of influence or whether it is compounded by the volume of material. Much appreciated, Jon
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John Smith
Wed. 11 Nov.15,
22:14
[Start of:
'Faster pulse sequences'
0 Reply]
Category:
General
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| Faster pulse sequences |
Hi,
I have been learning about faster MRI sequences and have two questions
1) With "Fast (Turbo) gradient echo", in which we apply a spoiler gradient, do we not eventually end up with no longitudinal magnetization because TR is always shorter than T1? Hence shouldn't we eventually get no signal at all?
2) in SSFP (Steady-state free precession) we can apply an RF pulse of 90 degrees (in which T1>>T2) to get heart-blood contrast. How is this any different to a standard spin-echo sequence in terms of timing?
Thank you
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Ranjith KO
Thu. 5 Nov.15,
11:40
[Start of:
'K-space data in DICOM'
0 Reply]
Category:
Equipment
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| K-space data in DICOM |
I have few doubts in technological aspects of MRI.
My doubt is about transferring of K-space data through network. Have any standard format or mechanism for it?
Have any standard format for it? (like from MR machine to processing system)
Have any standard tags in DICOM for embedding K-Space data?
if not have any standard (data format)way for transferring K-Space data through network ?
What is the mechanism used by popular MR suppliers used for data transfer of K-space data?
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