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| Result: Searchterm 'Second'
found in 24 messages |
| Result Pages: 1 2 3 [4] 5 |
More Results:  Database (79) News Service (51) Resources (6) |
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john pease
Mon. 18 Aug.08,
03:49
[Start of:
'Can I work as MRI Tech w/ ARRT(MR) but no ARRT(R)?'
2 Replies]
 Category:
Jobs
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| Can I work as MRI Tech w/ ARRT(MR) but no ARRT(R)? |
Hello,
I am a nuclear medicine technologist (NMTCB, ARRT(N))who has the chance to get MRI training OTJ. If I complete the 120 MRI procedures at my job that the ARRT requires in order to meet my clinical competency, then the ARRT will allow me to sit for the ARRT(MRI) examination without any additional education as a post-secondary pathway.
My question regards being hired: is it possible to get hired with an ARRT(N) and ARRT(MRI) to do MRI? Can the ARRT(N) be substituted for the ARRT(R) which it seems many if not most if not all places seem to want you to have (I have only looked at a few ads, but this seems to be true...)
Do hiring managers look more favorably on an MRI tech with ARRT(MRI) vs. just ARRT(R)?
Any information would be most appreciated!
Thanks!
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Reader Mail
Wed. 12 Dec.07,
10:07
[Reply (1 of 2) to:
'double ir physic'
started by: 'soontorn siriserussa'
on Sun. 2 Dec.07]
Category:
Sequences and Imaging Parameters
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| double ir physic |
Different types of double inversion recovery (DIR, 2IR) sequences are used to improve the suppression of blood signal (black blood technique) or to null the signals from two different tissue types (e.g. white matter and cerebrospinal fluid).
The black blood technique (used in cardiovascular MRI) works with two inversion pulses, where the first pulse is nonselective and the second pulse is slice-selective. TI is set to a value at which the signal of the recovering inverted blood is zero (http://www.mr-tip.com/serv1.php?type=db1&dbs=Double%20Inversion).
The second technique (also named gray matter only) is used in brain imaging to improve the detection of lesions, for example in the diagnostic of multiple sclerosis. Two 180° pulses with different TI are used to suppress two different types of tissue simultaneously.
Hope this helps
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Renate Bloemer
Mon. 13 Nov.06,
19:46
[Reply (1 of 3) to:
'MRA'
started by: 'Marco Costa'
on Sun. 22 Oct.06]
Category:
Protocols
|
| MRA |
A test bolus helps to get the delay at which time the CE-MRA sequence has to be started. The sequence needed is a one-slice dynamic fast gradient echo sequence (if possible with fat suppression or subtraction) and a temporal resolution of 0.5 to 1.5 sec. This thick slice is placed over the vessel of interest and the dynamic is started simultaneous with a small (1-2ml) bolus of Gad.
In the follow up you can see at which time the bolus is visible. If it is not clear to differentiate, a ROI measurement will help. The starting time depends on the k-space filling. Around the peak of the highest intensity, the contrast information should be read out (with "centric" at the beginning of the sequence).
Centric k-space filling order means that the central lines of the k-space are filled in the first seconds after starting the scan. Depending on the equipment, there is more than one non-centric order, for example linear, where the central lines are filled in the middle of the scan time.
Hope this helps.
Renate Bloemer
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Marco Costa
Sun. 22 Oct.06,
10:27
[Start of:
'MRA'
2 Replies]
Category:
Protocols
|
| MRA |
Hello!
Is my first time in this forum! I read it a lot this forum, is very helpfull for my job!
I have a dificult in my mri machine.
First i would like to now how can i construct a bolus teste manualy! I don't have smart prep. What sequence i must use and what parameters i must choose.
Second, can you expline to me the diference between centric fill of K-space and non centric?
When is the best time to star the sequence after take the time injection.
My regards
Marco Costa
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Emil Cohen
Sat. 19 Mar.05,
01:03
[Reply (3 of 4) to:
'CE MRA of the Liver'
started by: 'bob mitchell'
on Sun. 5 Dec.04]
Category:
Applications and Examinations
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| CE MRA of the Liver |
The above statements are correct, also remember that the portal vein is brightest in the first pass of contrast through it so having a short sequence for the arterial phase <20 seconds and going straight into the portal phase is important(ie one inspiration/expiration only between repeating the sequence). The portal vein will become brightest within 30 seconds of the artery.
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