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| Result: Searchterm 'DWI'
found in 27 messages |
| Result Pages: 1 2 3 4 [5] 6 |
More Results:  Database (41) News Service (47) Resources (15) |
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Bear DuDu
Thu. 18 Oct.07,
07:28
[Reply (1 of 2) to:
'DWI'
started by: 'Reader Mail'
on Wed. 17 Oct.07]
 Category:
Applications and Examinations
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| DWI |
DWI reflects the degree of water molecule movement. If the degree of water molecule movement in the tumor is the same as the normal tissue, the signal of DWI will have no difference between the tumor and the normal tissue.
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|  View the whole thread | | |
andri anto
Fri. 25 May.07,
06:17
[Reply (4 of 6) to:
'Brain Protocol'
started by: 'Oscar Cidri'
on Tue. 7 Sep.04]
Category:
Protocols
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| Brain Protocol |
Hi Oscar
The basic for head exam
Ax T1-WI, Ax T2-WI, Ax-Diffusion(DWI), Ax Flair, Cor T1 or T2, Sag T1 or T2, if any lession and suspect tumor, u can give Ax T1, Sag T1, Cor T1 with contrast injection.
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| | View the whole thread | | |
peter hobden
Wed. 14 Feb.07,
15:35
[Reply (1 of 3) to:
'Geometric distortion'
started by: 'ergun ahunbay'
on Tue. 2 Jan.07]
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?
There are other factors that can affect the /amount/ of distortion. Run an EPI sequence and change the bandwidth and see the image change shape.
There are other causes of image distortion which are not necessarily directly related to field homogeneity.
It is a complicated question you are asking here!
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?
I guess you are talking about spiral filling of k-space?? The sampling time reduction will help to reduce distortion to some extent.
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| | View the whole thread | | |
Renate Bloemer
Mon. 13 Nov.06,
19:35
[Reply (1 of 3) to:
'Receiver Bandwidth'
started by: 'Stephanie Taylor'
on Wed. 1 Nov.06]
Category:
Basics and Physics
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| Receiver Bandwidth |
Maybe these links will help: http://www.revisemri.com/tutorials/receiver_bandwidth/rbandwidth_files/fullscreen.htm
http://www.medical.siemens.com/siemens/en_US/rg_marcom_FBAs/files/DICpage/MRIHottopics2.pdf
http://www.ebyte.it/library/educards/mri/K-SpaceMRI.html
http://www.mr-tip.com/serv1.php?type=db1&dbs=Bandwidth
Renate Bloemer
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| | View the whole thread | | |
Reader Mail
Sun. 21 May.06,
13:53
[Reply (1 of 3) to:
'What Philips calls bandwidth'
started by: 'Anne Nelson'
on Thu. 4 May.06]
Category:
General
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| What Philips calls bandwidth |
The corresponding term is the water fat shift and can be changed in the contrast parameter table.
Lower bandwidth = higher water fat shift
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| | View the whole thread | |
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