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| Result: Searchterm 'sequence'
found in 106 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 |
More Results:  Database (378) News Service (28) Resources (10) |
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George LoGuirato
Wed. 7 Apr.10,
13:28
[Reply (1 of 2) to:
'Proton Density Imaging'
started by: 'Jacquelyn Chiffons'
on Thu. 18 Mar.10]
 Category:
Sequences and Imaging Parameters
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| Proton Density Imaging |
A Proton Density - like a T1 or T2 - is not considered anything; it is what you make it. Most all PD's are run as fast (turbo) spin echo, but many sites run a true spin echo PD on knees to evaluate the meniscus. (It's a long sequence.)
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|  View the whole thread | | |
George LoGuirato
Wed. 3 Mar.10,
15:38
[Reply (1 of 2) to:
'Dynamic Imaging'
started by: 'Ron Harris'
on Tue. 2 Mar.10]
Category:
Applications and Examinations
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| Dynamic Imaging |
Don't have a solid definition, but will give an example. Pituitary study: you can run a dynamic study by using a power injector set for a slow infusion rate of let's say 0.75ml/sec. The scanner is set to run a scan sequence through the PIT (25-35 seconds) and then repeat that sequence usually six times. The dynamic "uptake" and "falloff" of contrast in the PIT is evident.
Hope this helps.
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| | View the whole thread | | |
David Brooks
Tue. 22 Dec.09,
02:35
[Start of:
'Scan equation I don't get, HELP'
2 Replies]
Category:
Basics and Physics
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| Scan equation I don't get, HELP |
Here's the question:
The approximate scan time of a rapid spin echo sequence with a TR of 3500ms, a TE of 90ms, a 256x256 matrix, 1 exicitation, a 220mm FOV and an echo train length of 5 is______ minutes.
Formal they give is 3500msx1x256/5=?
a.3
b. 8
c. 11
d. 15
I get 179200. What am I missing in my studies and the math?
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Emer Naughton
Fri. 7 Aug.09,
09:37
[Reply (1 of 2) to:
'Siemens TRIO sequences'
started by: 'Al Berthiaume'
on Tue. 13 Jan.09]
Category:
Protocols
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| Siemens TRIO sequences |
Hi we have been using the standard siemens sequences for COW, and find them ok, as with the venogram sequences. What do you not like about the standard- theyre long, but 'id like to know why you don'tlike them, maybe we're missing somthing..
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Daniel Robertson
Thu. 23 Jul.09,
04:54
[Start of:
'MRI Spinal Ligaments'
0 Reply]
Category:
Applications and Examinations
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| MRI Spinal Ligaments |
I am a graduate student conducting research on spinal ligament mechanics. I am looking for a good imaging sequence to determine the geometry of the supraspinous ligament. I am working with cadaver specimens so patient motion and scan time is of little relevance. I am just looking to get the highest resolution possible so that I can render a 3d volume of the supraspinous ligament. I am using a GE Signa HDx 3T. Thanks.
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