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| Result: Searchterm 't2'
found in 67 messages |
| Result Pages: 1 2 3 4 5 6 7 8 9 [10] 11 12 13 14 |
More Results:  Database (155) News Service (28) Resources (5) |
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Sam Shelly
Sun. 2 Nov.08,
23:02
[Reply (2 of 3) to:
'Regarding recovery and decay [basic phycisc]'
started by: 'harry sanders'
on Sat. 7 Jun.08]
 Category:
Basics and Physics
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| Regarding recovery and decay [basic phycisc] |
Right on.
Recovery and delay are two separate physical processes like the last guy said. It had me stumped for a while when I was studying as well. But read carefully and think hard about it...
T1 recovery is the return of net magnetization into alignment with b0.
T2 decay is a totally different process and is, as the previous person said, simply loss of net magnetization in the transverse plain due to dephasing. The more electrons that are precessing in phase in the transverse plane, the stronger the NMV is in that plane. And, hence forth, when the RF pulse terminates, the influence of b0 gradually dephases the electrons in the transverse plane. As they dephase, the transverse NMV decreases accordingly, until the next pulse hits, rephasing the electrons and starting the process all over.
Hope that helps. MRI physics is hairy and boring at times. Load up on expressos to stay awake and stick with it, because studying MRI physics can be like taking a bottle of sleeping pills.
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Maricella Sauceda
Thu. 16 Oct.08,
22:33
[Start of:
'Translation of MRI Result - Help'
0 Reply]
Category:
Applications and Examinations
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| Translation of MRI Result - Help |
Okay... So below is what the MRI breakdown tells me, can someone tell me if I should definitely be worried... I think it says I have brain lessions associated to sinus problems, but then they said it might be a sign of MS? HELP... Any additional clarity will be greatly appreciated...
Technique: Sequences spin - echo-enhanced in T1, T2 protons and density, flair at the axial, sagittal and coronal, 5 mm thick.
Report:
Small punctate signals focal hypo-intense in T1 and hypertensive in the other sequences and without apparent mass effect in the lobar white matter and subcortical frontal, bilateral parietal subcortical and peri-ventricular the atriums of both lateral ventricles.
Others are not displayed disturbances of encephalic parenchyma or blood collections or intra extraxiales. The medulla oblongata, pons and the cerebral peduncles with normal morphology and signal. Tanks of the base, the subarachnoid space and the cortical ventricular system above and infratentorial not dilated, without compression or movement.
Thickening of the lining which is the frontal sinuses, ceidillas etmoidales and maxillary sinuses, in the latter left with the presence of liquid level.
Comments
Many small pictures that compromise the lobar white matter and subcortical frontoparietal and peri-ventricular atrial bilateral and that although might be nonspecific, it is not possible to rule out entirely demyelinating etiology, so it must be correlated with the clinic's patient, findings of physical examination and clinical-. A new study of control in timely fashion or according to clinical course can be useful.
Pan-chronic sinusitis with signs of acute in the left maxillary sinus.
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Gerald Del Castillo
Mon. 8 Sep.08,
03:45
[Reply (2 of 3) to:
'information needed'
started by: 'andre jefferson'
on Wed. 23 Jul.08]
Category:
Protocols
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| information needed |
Andre,
You can do a PD sagittal and/or T1 coronal. These two would give you meniscii tears, just magnify them and brighten the image to show the tear. You can also try the T2 STIR coronal to show some swelling and bone contusion. Check with your rad to find out proper protocols.
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young bong we
Thu. 20 Mar.08,
10:02
[Start of:
'MRI Bandwidth and turbo factor relation ?'
3 Replies]
Category:
Basics and Physics
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| MRI Bandwidth and turbo factor relation ? |
HI !
question)
we used hostipal Siemens Avanto 1.5T
I didnt know MRI Bandwidth and turbo factor relation ?
T1,T2,PD etc.. accoding to sequence Bandwidth and turbo factor relation
and T1, T2 appropriate Bandwidth and turbo factor relation ?
Please advice
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martin chavez
Thu. 31 Jan.08,
00:59
[Reply (1 of 2) to:
'gre trauma ax'
started by: 'diana navarro'
on Tue. 29 Jan.08]
Category:
Applications and Examinations
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| gre trauma ax |
this is a t2* or gradient echo and we use this for all head trauma pt's and to look for old blood in the brain.
gre trauma ax comes from a ge protocol and thats
what ge named that sequence.
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