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| Result: Searchterm 'HIS'
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Dirk Noel
Thu. 17 Jun.04,
04:26
[Reply (2 of 3) to:
'Black Blood MRA'
started by: 'ranran zhao'
on Sun. 6 Jun.04]
 Category:
Applications and Examinations
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| Black Blood MRA |
Hello Ranran,
Black Blood cine can be done simply on the system. Send me a direct email and we can discuss how to do this.
Dirk
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|  View the whole thread | | |
Tom Bellini
Mon. 14 Jun.04,
01:57
[Reply (1 of 3) to:
'Black Blood MRA'
started by: 'ranran zhao'
on Sun. 6 Jun.04]
Category:
Applications and Examinations
|
| Black Blood MRA |
The black blood effect is a natural high contrast between blood and myocardium caused by the flow void of blood. Black blood techniques are for example used to demonstrate fatty infiltration of the right ventricular wall with right ventricular dysplasia. Black blood MRA is usual based on fast spin echo or inversion recovery sequences and seldom used as cine imaging. The advantage of this type of sequence consists of being less sensitive to respiratory and cardiac motion. Bright blood cine imaging is the standard method, but there are manufacturer with different techniques, e.g. Toshiba has a black blood cine technique.
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ranran zhao
Sun. 6 Jun.04,
04:10
[Start of:
'Black Blood MRA'
2 Replies]
Category:
Applications and Examinations
|
| Black Blood MRA |
I have questions about black blood MRA sequences. Which range of application does this technique have? I have heard also cine black blood imaging is possible.
What is the advantage of black blood cine over standard bright blood cine?
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Service
Tue. 18 May.04,
15:51
[Reply (1 of 2) to:
'Cardiac Stent'
started by: 'Reader Mail '
on Tue. 18 May.04]
Category:
Safety
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| Cardiac Stent |
MRI-related problems with metallic prosthetic grafts are the magnetic moment and the heating possibility.
New cardiac stents (produced in the last 5-8 years) are mostly out of non-magnetic material. 2-3 month after the stent implantation it is to expect that stents will be covered with tissue and a movement in the magnetic field is unusual. A small risk of heating caused by induction remains
(the risk depends on the field strength and the scanned region) - but the fast flowing blood is a good cooling system and reduces this risk in addition.
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Schmidt Marga
Sat. 17 Apr.04,
20:41
[Reply (1 of 2) to:
'Moire fringing'
started by: 'Kelly Wimpey'
on Tue. 6 Apr.04]
Category:
Artifacts
|
| Moire fringing |
Moire fringes are typical for gradient echo sequences, especially balanced sequences like for example true fisp, bFFE. The reasons are interferences and field inhomogeneities. High order shimming (volume shimming), a more suitable coil, a smaller bandwidth, and scanning not in the edges of the magnetic field will avoid or reduce this artifact. Also parallel imaging techniques can have a positive influence. If this artifact appears, also by using other sequences, a new field adjustment can be necessary (service).
Hope this will help.
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