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| | | MRI Forum
'Proton Density' | | |
| Result: Searchterm 'Proton Density'
found in 11 messages |
| Result Pages: 1 [2] 3 |
More Results:  Database (20) News Service (2) |
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Steven Ford
Thu. 2 Dec.10,
15:18
[Reply (1 of 2) to:
'T1&T2 WAIGHTED MEANING ?'
started by: 'BINU VAEGHESE'
on Wed. 1 Dec.10]
 Category:
Basics and Physics
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| T1&T2 WAIGHTED MEANING ? |
All MRI images have contrast (the bright and the dark) that is based on properties of the tissue that's being imaged. In MRI (unlike, for example, CT) those images are based on a combination of several physical properties. So to some extent ALL MRI images are based partly on property A, property B, etc.
The tissue properties that are referred to include proton density (how many hydrogen nuclei are in a given area), motion, and two other properties that are called T1 and T2. These are properties that can be seen onloy by using the MRI instrument, much as without a microscope one cannot see inside a cell.
A T1 weighted image is one in which the differences between T1 properties of the various tissues are the predominant reason why some parts of the image are bright and others are not as bright.
This is medically useful because, since T1 and T2 are distinct properties, diseased tissue may show up different than normal tissue on either the T1 weighted scan or the T2.
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|  View the whole thread | | |
George LoGuirato
Wed. 7 Apr.10,
13:28
[Reply (1 of 2) to:
'Proton Density Imaging'
started by: 'Jacquelyn Chiffons'
on Thu. 18 Mar.10]
Category:
Sequences and Imaging Parameters
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| Proton Density Imaging |
A Proton Density - like a T1 or T2 - is not considered anything; it is what you make it. Most all PD's are run as fast (turbo) spin echo, but many sites run a true spin echo PD on knees to evaluate the meniscus. (It's a long sequence.)
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| | View the whole thread | | |
Mary York
Wed. 7 Jan.09,
19:22
[Reply (1 of 2) to:
'Best Sequence for Ulnar Collateral Ligament'
started by: 'Sam Shelly'
on Mon. 10 Nov.08]
Category:
Sequences and Imaging Parameters
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| Best Sequence for Ulnar Collateral Ligament |
2D or 3D T2* is a good choice. Depending on the machine, also proton density with fat suppression works well.
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| | View the whole thread | | |
zainudeen kallumpurath
Wed. 6 Jun.07,
05:33
[Reply (2 of 3) to:
'Proton Density and FOV'
started by: 'Anne Nelson'
on Tue. 8 May.07]
Category:
Sequences and Imaging Parameters
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| Proton Density and FOV |
I dont see any reason ,why one should have problem with large FOV Proton Density images, technically i dont think there is any such restriction.
what is the exact problem you facing with large FOV PD images?
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| | View the whole thread | | |
Jenny Jordan
Mon. 14 May.07,
07:24
[Reply (1 of 3) to:
'Proton Density and FOV'
started by: 'Anne Nelson'
on Tue. 8 May.07]
Category:
Sequences and Imaging Parameters
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| Proton Density and FOV |
Proton Density is often used for musculoskeletal exams with small FOVs. I know no reason why it should not work with a large FOV.
I use PD with fat suppression also for both hips with a FOV of 380 and it works.
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| | View the whole thread | |
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