|
Magnetic
Resonance -
Technology
Information
Portal |
Welcome to MRI Technology • |
|
|
 | Info
Sheets |
| | | | | | | | | | | | | | | | | | | | | | | | |
 | Out-
side |
| | | | |
|
| | | | | |
| Result: Searchterm 'AIN'
found in 209 messages |
| Result Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 [37] 38 39 40 41 42 |
More Results:  Database (389) News Service (888) Resources (128) |
|
|
Reader Mail
Wed. 26 Jul.06,
11:56
[Reply (1 of 2) to:
'vibe sequences in neuro mri?'
started by: 'syam reddy'
on Wed. 25 Jan.06]
 Category:
Sequences and Imaging Parameters
|
| vibe sequences in neuro mri? |
Vibe is a breathhold technique, so mor suitable for abdomen imaging.
mprage goes very well for post contrast brain imaging
|
|  View the whole thread | | |
Jennifer Jackson
Fri. 21 Jul.06,
04:44
[Reply (1 of 2) to:
'Phase encoding'
started by: 'guillaume bierry'
on Fri. 7 Jul.06]
Category:
General
|
| Phase encoding |
Wow this is a long subject, First you have to under stand how the 3 main gradients are used. (slice select, Freq, then phase)
So you are use 1 of the gradients for your phase encoding. You need to fill the k-space which depends on you matrix. Lets assume you are using 256 (phase). In order to fill K-space you have to have 256 aquistions of the signal. Meaning for each picture (or slice) the signal must be acquire(sampled) 256 times each at a differnt amplitude to put it in a different Line of k-space.
Example- If you are performing a SE(spin echo) you have 1 TR period and 1 TE period (TE=is when the signal is sampled) so you will have to do the TR period 256 times to fill K-space with diffent amplitudes.
There is alot more that I left out. If this did not answer your question let me know
|
| | View the whole thread | | |
guillaume bierry
Fri. 7 Jul.06,
13:06
[Start of:
'Phase encoding'
1 Reply]
Category:
General
|
| Phase encoding |
Hello,
Could someone explain me simply the principle of phase encoding ? I don't understand the principle of applying higher gradient at each step.
Thanks !
|
| | View the whole thread | Reply to this thread
(login or register first) | |
Michael Oliver
Sat. 27 May.06,
12:54
[Reply (1 of 3) to:
'ETL for a STIR'
started by: 'Shaun Schofield'
on Thu. 30 Mar.06]
Category:
Sequences and Imaging Parameters
|
| ETL for a STIR |
I prefer a range from 5-12 (but using shorter TE and TR). High echo trains can lead to blurring, image noise and contrast inhomogeneities.
Parallel imaging can reduce the longer scan time of low ETLs; also often 1 NSA is enough for sufficient SNR.
Hope this helps!
|
| | View the whole thread | | |
Donna Ponticello
Sun. 21 May.06,
13:49
[Reply (1 of 2) to:
'Omniscan Distribution Rate'
started by: 'John Dowling'
on Tue. 9 May.06]
Category:
Contrast Agents
|
| Omniscan Distribution Rate |
I do not doubt that there are small and may be in special cases (perfusion, MRA, etc.) useful differences.
However, I have a lot of practice in MRI and in my opinion, you are right, the differences are small and you can run every type of MRI scans with all conventional Gadolinium containing contrast agents.
D. P.
|
| | View the whole thread | |
| |
| | Result Pages : 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 [37] 38 39 40 41 42 | |
|
| |
 | Look
Ups |
| |
|
MR-TIP.com uses cookies! By browsing MR-TIP.com, you agree to our use of cookies. | | | [last update: 2024-02-26 03:41:00] |
|
|
bottom
top
