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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
 
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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John Smith

Wed. 11 Nov.15,
22:14

[Start of:
'Faster pulse sequences'
0 Reply]

 
  Category: 
General
 
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
 
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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ladan shahshahani

Sat. 11 Jul.15,
12:07

[Start of:
'fMRI/DTI fusion'
0 Reply]

 
  Category: 
Funktional MRI
 
fMRI/DTI fusion
Hello everybody
I want to work on fMRI and DTI fusion and I 'm kind of new in the fusion field. is there anybody with exprience in this field?
another question: is there any way for simulating fMRI and DTI data and use it for fusion?
thanks in advance
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Abhi Batra

Sun. 10 May.15,
17:12

[Start of:
'Is there T1*?'
0 Reply]

 
  Category: 
General
 
Is there T1*?
We always talk about T2*. Is there anything like T1*. If yes than what is difference between T1 and T1*
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