|
Magnetic
Resonance -
Technology
Information
Portal |
Welcome to MRI Technology • |
|
|
 | Info
Sheets |
| | | | | | | | | | | | | | | | | | | | | | | | |
 | Out-
side |
| | | | |
|
| | | | | |
| Result: Searchterm 'Image'
found in 128 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 |
More Results:  Database (454) News Service (255) Resources (73) |
|
|
Scott Lytle
Thu. 4 Jan.07,
17:52
[Reply (2 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 |
It depends.
When Centric echo allocation is used you have higher SNR, a low TE, but more image blurring. Very similar to a PD. I prefer an echo train of less than 8 in this case.
When Sequential echo allocation is used you have lower SNR, a higher TE (I prefer less than a TE of 60), but significantly less image blurring. Very similar to a T2 or FLAIR. In this case your echo train length is governed by your TE and image blurring is not usually an issue. Depending on how short of an inter-echo time you can use, and by keeping an eye on the TE, the echo train can be as high as you want.
Hope this helps.
|
|  View the whole thread | | |
ergun ahunbay
Tue. 2 Jan.07,
19:20
[Start of:
'Geometric distortion'
2 Replies]
Category:
Artifacts
|
| Geometric distortion |
Dear Listers,
I have some questions about the image distortions in MRI:
1) Are the magnetic field inhomogeneities the only cause of image distortions? Does RF-inhomogeneities cause distortions or just signal inaccuracies?
2) Is it accurate to say that a spiral sequence would not have distortion due to magnetic field inhomogeneity(, but it would have blurring). Would there be image geometric distortions with a spiral imaging?
thank you very much in advance
|
| | View the whole thread | Reply to this thread
(login or register first) | |
Michael Daniec
Fri. 1 Dec.06,
20:47
[Reply (1 of 2) to:
'pgh to dicom conversion?'
started by: 'corey walker'
on Thu. 26 Oct.06]
Category:
General
|
| pgh to dicom conversion? |
we should be able to help, need more information to assess (how would you provide the images, ie. what media, quantity of images etc.)
you can contact me also at:
Michael Daniec
National Data Conversion Institute
212 463-7511 x107 or mdaniec@ndci.com
|
| | View the whole thread | | |
Renate Bloemer
Mon. 13 Nov.06,
19:29
[Reply (1 of 2) to:
'T1 FAT SAT PRE AND POS GADO'
started by: 'CLAUDIO RIBERTI'
on Tue. 24 Oct.06]
Category:
Contrast Agents
|
| T1 FAT SAT PRE AND POS GADO |
The contrast agent causes this difference. Contrast agents reduce the T1 time in tissues where they have accumulated depending on blood flow and vascular permeability. Caused by this, tissues after an application of contrast agents will differ in shortening of the T1 time, and the same imaging parameters result in other image appearance.
Some helpful links for musculoskeletal imaging and Fat Sat:
http://www.moffitt.org/moffittapps/ccj/v8n3/pdf/221.pdf
http://www.medical.siemens.com/siemens/en_US/gg_mr_FBAs/files/MRI_Hot_Topics/MRI_HotTopics_Skinny_on_FatSat_engl.pdf
Hope this helps
Renate Bloemer
|
| | View the whole thread | | |
CLAUDIO RIBERTI
Tue. 24 Oct.06,
19:24
[Start of:
'T1 FAT SAT PRE AND POS GADO'
1 Reply]
Category:
Contrast Agents
|
| T1 FAT SAT PRE AND POS GADO |
ANYBODY COULD GIVE ME A GOOD ANSWER WHY T1 FAT SAT IMAGES PRE AND POS GADO ARE SO DIFERENT CONCERNING TO THE MUSCULATURE, FAT AND OTHER STRUCTURES ?
THE MUSCLES ARE DARKER AND BETTER VISUALIZED,THE FAT COMES ALSO DARKER LIKE WE HAVE SEEN A SERIE WITH OTHER WEIGHT.
PS:.THE SERIES ARE EXACTLY THE SAME AND WERE PRINTED WITH THE SAME LEVEL AND WIDTH.
PS2:. IS THIS THE SAME THAT OCCURS IN T1 FAT SAT OF THE ANKLE WHERE THE LIQUID APPEARS BRIGHT ?
PS3:. HOW COULD I EXPLAIN BOTH ?
THANKS.
CLAUDIO
|
| | View the whole thread | Reply to this thread
(login or register first) |
| |
| | 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 | |
|
| |
 | 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
