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Result: Searchterm 'HIS'
found in 303 messages |
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More Results: Database (430) News Service (375) Resources (57) |
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Don LaVille
Tue. 21 Dec.10, 20:57
[Reply (1 of 3) to: 'Muscle shading in 3T Images' started by: 'Travis Conley' on Thu. 21 Oct.10]
Category:
Applications and Examinations |
Muscle shading in 3T Images |
This artifact is known as the dielectric effect. It is a phenomena to all magnets. At 1.5T the dielectric effect is at 60cm so when we scan at a FOV of 40 or less we don't see it. At 3t the dielectric effect is reduced to 30cm so we now see it when using a FOV of 30 or more. There is no way to get rid of it that I know of and you will see an increase with patients with more magnetic suseptibility (ie. patients with ascities, and pregnant patient). You could try using Surface Coil Intensity Correction (SCIC) and it will help to even out the extreme dark and light in your image. Some vendors will suggest using a Fat Sat pad to help reduce this artifact. I have tried it with little success.
Looking at your image, it looks like you were scanning on a GE 3T HDX. I hope that the vendors will have a fix for this artifact soon. For right now though we are just dealing with it. I hope this helps.
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Sandy Paige
Mon. 20 Dec.10, 19:27
[Reply (3 of 4) to: 'Where to get MR physicist?' started by: 'Mitchell Sapp' on Thu. 4 Nov.10]
Category:
Jobs |
Where to get MR physicist? |
Hi Mitchell,
I work for Phoenix Technology Corp, a medical physics consulting group based in Atlanta. We have quite a few clients in South Georgia and if you are still looking for physics services we would be happy to help you. Our website is www.ptcphysics.com and phone number is 770-645-1440, or you can email me. Hope your search goes well, this is a great website for information!
Best Regards,
Sandy Paige
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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 |
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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Rebecca Pitchford-Bell
Tue. 30 Nov.10, 16:05
[Reply (1 of 2) to: 'angio' started by: 'Oktay DERELI' on Sat. 31 Jul.10]
Category:
Protocols |
angio |
TRICKS if available. This is a multipass software that allows the collection of data quickly. The contrast can be followed through multiple passes including delays to show if contrast actually does reach the toes and return to venous flow. It will show collateral vessels and help the surgeons decide direction to take.
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yingjie mei
Thu. 4 Nov.10, 02:23
[Reply (2 of 3) to: 'Dynamic data of MRI' started by: 'yingjie mei' on Wed. 21 Oct.09]
Category:
Basics and Physics |
Dynamic data of MRI |
i almost forgot this post, but the data are still desired! i'm in the research of dynamic mri reconstruction algorithms, maybe we can communicate someday, my email: yingjie.mei@gamil.com.
Thx for ur help.
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