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Steven Ford
Mon. 7 Mar.11,
16:07
[Reply (6 of 8) to:
'6-1.5T MAGNETS, DIFFERING GRADIENTS'
started by: 'Elise Gough'
on Wed. 23 Feb.11]
 Category:
Applications and Examinations
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| 6-1.5T MAGNETS, DIFFERING GRADIENTS |
We maintain a lot of magnets. The leading cause of image quality problems is applications related. Nobody can possibly know all the nuances of pulse sequences by various vendors, software levels, etc. I've heard many times that a certain machine is no good, when in fact the sequences are inefficiently set up. Look there first.
Usually the techs welcome good training. If they don't want to be trained, then you have a problem, but it sounds like this issue is caused by other factors.
If there are differences in baseline quality between the machines, then compensate for that by other means. Signal starvation is easily remedied; keep the quality as consistent as you can and let time be the variable, if it comes down to that.
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|  View the whole thread | | |
Robert Patten
Thu. 3 Mar.11,
22:08
[Start of:
'Building 3d Volumes from MRI DICOM'
4 Replies]
Category:
General
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| Building 3d Volumes from MRI DICOM |
I have a number of MRI and CTs since a bad accident. I am a Mechanical Engineer with an electrical, power and computer background.
I was able to render the CT to 3D using Onis (not sure if you've seen this program), but have been unable to manage it with any of the MRIs.
The MRIs were taken on a Phillips Intera 1.5T
I can render a volume but only (1) of the (3) 2D images are clear before it is rendered and the resulting 3D image is just noise. I've tried various software packages and spent a lot of time with the software. Perhaps I don't have the required image files.
Maybe someone knows the answer.
Thanks,
Bob
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Steven Ford
Thu. 3 Mar.11,
20:28
[Reply (1 of 8) to:
'6-1.5T MAGNETS, DIFFERING GRADIENTS'
started by: 'Elise Gough'
on Wed. 23 Feb.11]
Category:
Applications and Examinations
|
| 6-1.5T MAGNETS, DIFFERING GRADIENTS |
I assume that you mean a t2 fat suppressed sequence. Differing gradient strengths have only an indirect effect on these images. The fat saturation sequences require additional pulses which take time to execute; stronger gradient systems can execute these pulses faster.
If you see different results, it can be caused by a number of factors; if you can describe the differences, that would be helpful. Generally speaking, the quality of the magnet homogeneity makes a big difference. If the small FOV scans (wrist) look different from magnet to magnet, that's probably not the cause.
You should ask your MRI applications specialist about this, and pay attention to the TE and bandwidth. Are the FOV and number of steps the same?
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Shauna Smith
Wed. 5 Jan.11,
17:39
[Reply (1 of 2) to:
'imaging education association'
started by: 'cherry pie'
on Tue. 26 Oct.10]
Category:
General
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| imaging education association |
I don't know if you are still interested in purchasing imaginged, but I just wanted to share my experience. I just passed my MRI boards and I prepared for it by reading MRI in Practice and viewing the imagingeded videos. They really complimented each other. The book is very thorough and technical and the videos put it all into everyday language. For me it was helpful to have someone explain many of the concepts. Candi is a great teacher and made it easy to understand...well almost easy..it is MRI afterall! Hope this helps:)
CaliMRI
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| | View the whole thread | | |
mike lozito
Tue. 28 Dec.10,
16:10
[Reply (3 of 4) to:
'please help me for find user manual siemens avento'
started by: 'reza beigi'
on Tue. 6 Jul.10]
Category:
Devices, Scanner, Machines
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| please help me for find user manual siemens avento |
i agree, that you should try to contact siemens directly. if they cannot help you i have an extra copy that i might be able to sent you for a small fee. based on my experience,the manuals really are NOT much help as, performing the required actions needed to complete scans are not fully outlined in the manuals, that usally comes from applications training from the manufacturer. it sounds like you purchased a used system with no applications support. siemens systems are fantastic mri scanners. but you are going to need applications help. i can offer assistance in this area if you would like . i am a chief mri technologist here in ny, and have 23 years mri scanning experience.i have 5 years siemens avanto expertise, performing body, msk, neuro, angio and breast mri and biopsy experience. you can contact me at my email mcl1956m@aol.com
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