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| Result: Searchterm 'ffe'
found in 134 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 27 |
More Results:  Database (446) News Service (436) Resources (66) |
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Aaliah Thomas
Mon. 23 May.11,
07:41
[Reply (1 of 3) to:
'LCD Display Monitors'
started by: 'robert popilock'
on Mon. 23 May.11]
 Category:
Safety
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| LCD Display Monitors |
Hey! The role of an LCD display is only to draw a picture of the signals emitted from different body tissues. Hence the size of the display doesn’t put any effect as such. But the bigger the display is, the clearer will be the image. So it’s better to go for 32” LCD display with full HD resolution for clear picture. Yes, IEC JTC1 is developing a governance standard aimed at helping organizations govern information security, specifically the standard of deliverables.
Winners never quit and quitters never win -Anon.
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|  View the whole thread | | |
Klarns Ki
Sun. 22 May.11,
08:58
[Start of:
'T1 & T2 map vs T1W & T2W'
0 Reply]
Category:
Basics and Physics
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| T1 & T2 map vs T1W & T2W |
Hi
Does anyone can explain me the differences between T1 map compare to T1 weighted map ? and T2 map compare to T2 weighted map ?
Thanks
Klarns
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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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Elise Gough
Mon. 7 Mar.11,
15:56
[Reply (5 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 |
Thanks so much for the input. NOBODY in my group seems to have a handle on why images vary in quality from 8 different magnets. I'm being pressed to take position of imaging specialist and thru my own research we have gradient strengths from 50 slew rate up to 120. Radiologists complain neuro stinks on the 50 slew rate 1.5T magnet and it is the most pounded on magnet in our group doing hospital inpatients. So many variables including tech expertise.
Elise Gough RT(R)(CT)(MR)
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| | View the whole thread | | |
Renate Semrau
Mon. 7 Mar.11,
15:11
[Reply (3 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 |
Slew rate, rise time and/or duty cycle are specific parameters to describe the performance of the gradient amplifier. Amplifiers with higher performance allow a faster slew rate (shorter rise time). Stronger gradients allow to reduce echo time, increase the bandwidth and/or use a smaller FOV by influencing the SNR. To use same parameters on magnets with different gradient performance may not be recommended, or you have to adjust all parameters to the level of your magnet with the poorest performance.
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