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Result : Searchterm 'Tesla' found in 3 terms [ ] and 38 definitions [ ]
| previous 21 - 25 (of 41) nextResult Pages : [1] [2 3 4 5 6 7 8 9] | ![](gifs/nb.gif) | | ![](gifs/mores_2.gif) | Searchterm 'Tesla' was also found in the following services: | | | | |
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The principal advantage of MRI at high field is the increase in signal to noise ratio. This can be used to improve anatomic and/or temporal resolution and reduce scan time while preserving image quality. MRI devices for whole body imaging for human use are available up to 3 tesla (3T). Functional MRI ( fMRI) and MR spectroscopy ( MRS) benefit significantly. In addition, 3T machines have a great utility in applications such as TOF MRA and DTI. Higher field strengths are used for imaging of small parts of the body or scientific animal experiments. Higher contrast may permit reduction of gadolinium doses and, in some cases, earlier detection of disease.
Using high field MRI//MRS, the RF-wavelength and the dimension of the human body complicating the development of MR coils. The absorption of RF power causes heating of the tissue. The energy deposited in the patient's tissues is fourfold higher at 3T than at 1.5T. The specific absorption rate (SAR) induced temperature changes of the human body are the most important safety issue of high field MRI//MRS.
Susceptibility and chemical shift dispersion increase like T1, therefore high field MRI occasionally exhibits imaging artifacts. Most are obvious and easily recognized but some are subtle and mimic diseases. A thorough understanding of these artifacts is important to avoid potential pitfalls. Some imaging techniques or procedures can be utilized to remove or identify artifacts. See also Diffusion Tensor Imaging.
See also the related poll result: ' In 2010 your scanner will probably work with a field strength of' | | | | | | | | | | | Further Reading: | | Basics:
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IMRIS® is a Canadian manufacturer of Magnetic Resonance Imaging Systems for use in neurosurgical operating rooms. The 1.5T intra-operative system, developed by IMRIS, is the only system of its kind in the world. This patented, intra-operative system, is designed so that the magnet moves over the patient for imaging (before, during and after surgery), and then is retracted to allow complete surgical access to the patient.
MRI Scanners:
Contact Information
MAIL
IMRIS®
435 Ellice Avenue
Winnipeg.MB
Canada R3B1Y6
PHONE
1-88-304-0114 or 204-983-6867
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![www.medical.philips.com/main/products/mri/products/intera_achieva3.0t/](devgifs/achieva3t.jpg)
From Philips Medical Systems;
Philips continues to expand the frontiers of utra high field MRI with the introduction of the new Intera Achieva 3.0T™. Its powerful future-safe platform shares all the advantages of the Achieva family and covers applications throughout the whole body.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Short bore compact
SE, Modified-SE, IR (T1, T2, PD), STIR, FLAIR, SPIR, FFE, T1-FFE, T2-FFE, Balanced FFE, TFE, Balanced TFE, Dynamic, Keyhole, 3D, Multi Chunk 3D, Multi Stack 3D, K Space Shutter, MTC, TSE, Dual IR, DRIVE, EPI, Cine, 2DMSS, DAVE, Mixed Mode; Angiography: Inflow MRA, TONE, PCA, CE MRA
128 x 128, 256 x 256,512 x 512,1024 x 1024 (64 for Bold img)
Variable in 1% increments
Lum.: 120 cd/m2; contrast: 150:1
Variable (op. param. depend.)
POWER REQUIREMENTS
380/400 V
Passive and dynamic, 1st order std./2nd opt.
| | ![spacer](gifs/nb.gif) | | • View the DATABASE results for 'Intera Achieva 3.0T™' (2).![Open this link in a new window](gifs/nw3_g.gif)
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| ![](gifs/nb.gif) | ![](gifs/mores_2.gif) | Searchterm 'Tesla' was also found in the following services: | | | | |
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| | ![spacer](gifs/nb.gif) | | • View the DATABASE results for 'Larmor Frequency' (27).![Open this link in a new window](gifs/nw3_g.gif)
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| ![](gifs/nb.gif) | ![](gifs/mores_2.gif) | Searchterm 'Tesla' was also found in the following services: | | | | |
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![www.healthcare.siemens.com/magnetic-resonance-imaging/7t-mri-scanner/magnetom-7t](devgifs/7t.png)
From Siemens Medical Systems;
The MAGNETOM 7T is designed as an open research platform. 7T MRI provides anatomical detail at the submillimiter scale, enhanced contrast mechanisms, outstanding spectroscopy performance, ultra-high resolution functional imaging ( fMRI), multinuclear whole-body MRI and functional information.
This ultra high field (UHF) MRI device is a research system and not cleared, approved or licensed in any jurisdiction for patient examinations.
Device Information and Specification
CLINICAL APPLICATION
Whole body
High-performance, ultra high field coils available. Integration and support for coil developments.
CHANNELS (min. / max. configuration)
32, optional 8 channels TX array
40 x 40 x 30 cm³ less than 8% nonlinearity
MAGNET WEIGHT (gantry included)
35017 kg
DIMENSION H*W*D (gantry included)
320 x 240 x 317,5 cm
MAX. AMPLITUDE
up to 70 mT/m
Up to 3rd order shim coils, user configurable B0 shim ? B0 maps and ROI definition
POWER REQUIREMENTS
2000 Volts, 650A
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