|
Magnetic
Resonance -
Technology
Information
Portal |
Welcome to MRI Technology • |
|
|
 | Info
Sheets |
| | | | | | | | | | | | | | | | | | | | | | | | |
 | Out-
side |
| | | | |
|
| | | | | |
| Result: Searchterm 'epi'
found in 15 messages |
| Result Pages: 1 2 [3] |
More Results:  Database (85) News Service (35) Resources (6) |
|
|
Reader Mail
Mon. 14 Jan.08,
22:49
[Reply (2 of 4) to:
'Mechanical Ventilator outside of Scan room'
started by: 'Dan Barrieau'
on Wed. 20 Jun.07]
 Category:
Site Planning and Specifications
|
| Mechanical Ventilator outside of Scan room |
Just to add to that. The rooms are lined with copper mesh so that Radio Frequency (RF) outside the room will not affect the image quality (and vise versa so your monitors won't freak out). The tubes through the wall are long enough to absorb and basically prevent any RF from getting in or out. The place in question probably couldn't justify the money to buy an MR safe vent. And I can't think of any pump that would be safe inside the room; although, some sites will chance taking pumps in and keeping them at a distance from the magnetic field.
|
|  View the whole thread | | |
Gerald Del Castillo
Fri. 30 Nov.07,
05:33
[Start of:
'ARMRIT to ARRT pathway - - - HELP'
16 Replies]
Category:
Organisations
|
| ARMRIT to ARRT pathway - - - HELP |
I'm a current MRI Technologist for an outpatient facility. I am licensed by ARMRIT, licensed by the state of NY. I was wondering if anybody out there can give me some information regarding a pathway or bridge program for current MR technologist, non-ARRT license, able to sit down for the ARRT test. I have been searching for schools, especially online, that has courses, which allows non-ARRT MR techs, to sit for the ARRT exam. It has been a challenge looking for jobs since I'm not an ARRT, but I'm keeping my hopes up.
|
| | View the whole thread | Reply to this thread
(login or register first) | |
peter hobden
Wed. 14 Feb.07,
15:35
[Reply (1 of 3) to:
'Geometric distortion'
started by: 'ergun ahunbay'
on Tue. 2 Jan.07]
Category:
Artifacts
|
| Geometric distortion |
Dear Listers,
I have some questions about the image distortions in MRI:
1) Are the magnetic field inhomogeneities the only cause of image distortions? Does RF-inhomogeneities cause distortions or just signal inaccuracies?
There are other factors that can affect the /amount/ of distortion. Run an EPI sequence and change the bandwidth and see the image change shape.
There are other causes of image distortion which are not necessarily directly related to field homogeneity.
It is a complicated question you are asking here!
2) Is it accurate to say that a spiral sequence would not have distortion due to magnetic field inhomogeneity(, but it would have blurring). Would there be image geometric distortions with a spiral imaging?
I guess you are talking about spiral filling of k-space?? The sampling time reduction will help to reduce distortion to some extent.
|
| | View the whole thread | | |
Scott Lytle
Thu. 4 Jan.07,
17:52
[Reply (2 of 3) to:
'ETL for a STIR'
started by: 'Shaun Schofield'
on Thu. 30 Mar.06]
Category:
Sequences and Imaging Parameters
|
| ETL for a STIR |
It depends.
When Centric echo allocation is used you have higher SNR, a low TE, but more image blurring. Very similar to a PD. I prefer an echo train of less than 8 in this case.
When Sequential echo allocation is used you have lower SNR, a higher TE (I prefer less than a TE of 60), but significantly less image blurring. Very similar to a T2 or FLAIR. In this case your echo train length is governed by your TE and image blurring is not usually an issue. Depending on how short of an inter-echo time you can use, and by keeping an eye on the TE, the echo train can be as high as you want.
Hope this helps.
|
| | View the whole thread | | |
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
|
| 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.
|
| | View the whole thread | |
| |
| | Result Pages : 1 2 [3] | |
|
| |
 | Look
Ups |
| |
|
MR-TIP.com uses cookies! By browsing MR-TIP.com, you agree to our use of cookies. | | | [last update: 2024-02-26 03:41:00] |
|
|
bottom
top
