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| Result: Searchterm 'Sequences'
found in 59 messages |
| Result Pages: 1 2 3 4 5 6 7 8 9 10 11 [12] |
More Results:  Database (188) News Service (6) Resources (8) |
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Susan Angelico
Tue. 26 Oct.04,
00:24
[Reply (1 of 6) to:
'Brain Protocol'
started by: 'Oscar Cidri'
on Tue. 7 Sep.04]
 Category:
Protocols
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| Brain Protocol |
Hi Oscar,
depending of the indication (tumor, stroke, haemorrhage, epilepsy, inflammation, malformation....) different sequences are useful for brain MRI.
A protocol for a wide range of indications: sagittal T2, coronal Flair, transversal DWI and transversal T1 without and with contrast medium. In case of a result a second plane of a T1 sequence after contrast e.g. coronal is recommended.
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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
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| 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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| | View the whole thread | | |
ranran zhao
Sun. 6 Jun.04,
04:10
[Start of:
'Black Blood MRA'
2 Replies]
Category:
Applications and Examinations
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| 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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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
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| 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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