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| Result: Searchterm 'signal'
found in 52 messages |
| Result Pages: 1 2 3 4 [5] 6 7 8 9 10 11 |
More Results:  Database (369) News Service (50) Resources (8) |
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Steven Ford
Tue. 7 Jun.11,
18:03
[Reply (2 of 3) to:
'LCD Display Monitors'
started by: 'robert popilock'
on Mon. 23 May.11]
 Category:
Safety
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| LCD Display Monitors |
I think that the question is, can you use a display near the magnet, inside the RF shielded room?
The short answer is, No, unless it's specifically marked MR-safe and/or included in equipment that's specificaly designed to be near the magnet, such as an injector.
The problem with using, for example, a monitor from Best Buy is that it will probably emit RF energy that will corrupt the very weak MRI signal recieved from the patient's body. Of course, there is also the question of anchoring the monitor to prevent it from being attracted into the magnet.
In general, an off the shelf monitor will not be affected by the magnet.
You can buy special RF shielded monitors, or enclosures.
If you were thinking about adding a patient DVD viewing capability, there are several other concerns to keep in mind. The signal feeding the monitor must be filtered where it enters the RF shield.
Steven Ford
Professional Imaging Services, Inc.
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|  View the whole thread | | |
Katelin Lyons
Fri. 3 Jun.11,
11:55
[Reply (1 of 2) to:
'Dixon technique'
started by: 'Reader Mail'
on Wed. 1 Jun.11]
Category:
Sequences and Imaging Parameters
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| Dixon technique |
Dixon technique uses alternative water/fat phase-encoding strategies. The technique is generalized to phase encoding of theta radians, and the signal-to-noise ratio (S/N) performance is evaluated.To get some more information regarding this please check out the following link : http://www.ncbi.nlm.nih.gov/pubmed/18777528
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| | View the whole thread | | |
Reader Mail
Wed. 1 Jun.11,
14:14
[Start of:
'Dixon technique'
1 Reply]
Category:
Sequences and Imaging Parameters
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| Dixon technique |
I have been searching the web for information regarding a "double-echo two-excitation pulse sequence encoding fat and water signals for a phase-sensitive three-point Dixon type analysis". Does anyone know what pulse sequence(s) this is referring to, or a publication that might be helpful???
Thanks
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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
|
| 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 | | |
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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