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| Result: Searchterm 'Imaging'
found in 89 messages |
| Result Pages: 1 2 3 4 5 6 [7] 8 9 10 11 12 13 14 15 16 17 18 |
More Results:  Database (547) News Service (1520) Resources (268) |
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Michael Jansen
Fri. 3 Aug.12,
13:42
[Start of:
'I see a lesion on MRI that doesn't look like anything I know'
0 Reply]
 Category:
Applications and Examinations
|
| I see a lesion on MRI that doesn't look like anything I know |
Imaging is becoming increasingly important in clinical Neurology. How many patients are still being diagnosed without undergoing an imaging exam? Brain MRI is a superior diagnostic tool, but can be very challenging to master. However, fast and accurate interpretation of the images is of paramount importance. Rapid advances in MR imaging mean that there is a lot of information to keep up with... Enter NeuroRadDDx: the online tool that helps you interpret brain MRI exams. It creates comprehensive differential diagnoses based on the imaging characteristics you see on your screen. To further aid you in finding in on the correct diagnosis, the software provides example MR images and links to relevant literature. Go to http://neuroradddx.simplelander.com and sign up to receive updates about the upcoming launch of the NeuroRadDDx website!
http://neuroradddx.simplelander.com
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Myla Taller
Thu. 17 May.12,
11:34
[Start of:
'Job Opportunities in Qatar'
4 Replies]
Category:
Jobs
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| Job Opportunities in Qatar |
Our Qatar based client is currently looking for qualified Technologists for the following categories:
Senior Radiology Technologist CT Scan (Pediatrics)
Senior Radiology Technologist Interventional Angiography
Radiology Technologist Interventional Angiography
Senior Radiology Technologist MRI (Pediatrics)
Radiology Technologist Bone Mineral Densitometry/Gen X-Ray
Radiology Technologist Mammography
Radiology Technologist MRI (Oncology)
Radiology Technologist Cardiac Nuclear Medicine
Radiology Supervisor Ultrasound Specialized/Management
Radiology Technologist Ultrasound (Breast Imaging)
Radiology Technologist Ultrasound
Radiology Technologist Ultrasound (IVF)
The post offers a generous tax free remuneration package which includes: Basic Salary Range salary is open for negotiation and will depend on your qualifications & experience; 40 days annual vacation
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Artemiy Artemiy
Wed. 21 Mar.12,
11:44
[Reply (3 of 4) to:
'How to estimate areas of lesion on MRI in multiple sclerosis'
started by: 'Artemiy Artemiy'
on Fri. 16 Mar.12]
Category:
Applications and Examinations
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| How to estimate areas of lesion on MRI in multiple sclerosis |
I am ready to present some links:
Cognitive correlates of supratentorial atrophy on MRI in multiple sclerosis
www.ncbi.nlm.nih.gov/pubmed/11589650
Cerebral atrophy and disability in relapsing-remitting and secondary progressive multiple sclerosis over four years
www.ncbi.nlm.nih.gov/pubmed/12617263
Resolution-dependent estimates of lesion volumes in magnetic resonance imaging studies of the brain in multiple sclerosis
onlinelibrary.wiley.com/doi/10.1002/ana.410380509/abstract
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Steven Ford
Wed. 14 Mar.12,
21:16
[Reply (1 of 4) to:
'Who shims MRI systems in Uzbekistan'
started by: 'Reader Mail'
on Wed. 14 Mar.12]
Category:
Equipment
|
| Who shims MRI systems in Uzbekistan |
We can help you out; email me sford@proimagingservices.com.
Steven Ford
Professional Imaging Services, Inc.
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Steven Ford
Tue. 31 Jan.12,
08:19
[Reply (1 of 2) to:
'RF shimming'
started by: 'Reader Mail'
on Thu. 1 Oct.09]
Category:
Basics and Physics
|
| RF shimming |
For Magnetic fields, the overall field is adjusted to push it up a little bit in one spot and push it down a little bit in another area. The goal is to create a field that's perfectly homogenous.
The RF field created by the transmit coil likewise must be as homogenous as possible, so that the flip angle is constant throughout the imaging volume. In the past, designers have solved this problem by building coils such as the 'birdcage' style that would create a very even amount of energy inside. This is one reason why the transmit coils tend to be large.
With the advent of 3 Tesla and stronger magnets, the RF resonant frequency also rises. RF energy absorbed in the patient rises with the higher frequencies also, and another problem raises its head: it's a lot harder to make a very homogenous RF field. Even if you are scanning phantoms, the inside tends to be subject to different energy than the edges.
But in the human body, there are all sorts of irregular lumps and bumps that absorb RF differently, further complicating matters.
Now, on modern scanners it's possible to perform a magnetic field shim with the patient actually in the magnet in order to compensate for minute changes in the magnet from one exam to another. For super-high field magnets, an RF shim is also a handy thing to do.
If you have a Multi element RF transmit coil (regular phased array coils are just for receiving) you can run a program which selectively turns up the power in some elements so that the overall signal received is maximized. That's an RF shim.
Steven Ford
Professional Imaging Services, Inc.
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