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Result : Searchterm 'Magnetic Resonance Imaging MRI' found in 1 term [] and 9 definitions [], (+ 18 Boolean[] results
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Searchterm 'Magnetic Resonance Imaging MRI' was also found in the following services: 
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Echo Planar ImagingInfoSheet: - Sequences - 
Intro, 
Overview, 
Types of, 
etc.MRI Resource Directory:
 - Sequences -
 
Echo Planar Imaging Timing Diagram (EPI) Echo planar imaging is one of the early magnetic resonance imaging sequences (also known as Intascan), used in applications like diffusion, perfusion, and functional magnetic resonance imaging. Other sequences acquire one k-space line at each phase encoding step. When the echo planar imaging acquisition strategy is used, the complete image is formed from a single data sample (all k-space lines are measured in one repetition time) of a gradient echo or spin echo sequence (see single shot technique) with an acquisition time of about 20 to 100 ms. The pulse sequence timing diagram illustrates an echo planar imaging sequence from spin echo type with eight echo train pulses. (See also Pulse Sequence Timing Diagram, for a description of the components.)
In case of a gradient echo based EPI sequence the initial part is very similar to a standard gradient echo sequence. By periodically fast reversing the readout or frequency encoding gradient, a train of echoes is generated.
EPI requires higher performance from the MRI scanner like much larger gradient amplitudes. The scan time is dependent on the spatial resolution required, the strength of the applied gradient fields and the time the machine needs to ramp the gradients.
In EPI, there is water fat shift in the phase encoding direction due to phase accumulations. To minimize water fat shift (WFS) in the phase direction fat suppression and a wide bandwidth (BW) are selected. On a typical EPI sequence, there is virtually no time at all for the flat top of the gradient waveform. The problem is solved by "ramp sampling" through most of the rise and fall time to improve image resolution.
The benefits of the fast imaging time are not without cost. EPI is relatively demanding on the scanner hardware, in particular on gradient strengths, gradient switching times, and receiver bandwidth. In addition, EPI is extremely sensitive to image artifacts and distortions.
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• Related Searches:
    • Motion Probing Gradient
    • Susceptibility Artifact
    • Sensitivity Encoding
    • Perfusion Imaging
    • K-Space Trajectory
 
Further Reading:
  Basics:
New Imaging Method Makes Brain Scans 7 Times Faster
Sunday, 9 January 2011   by www.dailytech.com    
Searchterm 'Magnetic Resonance Imaging MRI' was also found in the following services: 
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Signa HDx 1.5T™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.
 
www.vitalcom.com/euen/mri/products/signa-hdx-15t/index.html From GE Healthcare;
The GE Signa HDx MRI system is a whole body magnetic resonance scanner designed to support high resolution, high signal to noise ratio, and short scan times.
The 1.5T Signa HDx MR Systems is a modification of the currently marketed GE 1.5T machines, with the main difference being the change to the receive chain architecture that includes a thirty two independent receive channels, and allows for future expansion in 16 channel increments. The overall system has been improved with a simplified user interface and a single 23" liquid crystal display, improved multi channel surface coil connectivity, and an improved image reconstruction architecture known as the Volume Recon Engine (VRE).
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Compact short bore
Possible
SYNCHRONIZATION
ECG/peripheral, respiratory gating, (SmartPrep, SmartStep)
PULSE SEQUENCES
Standard: SE, IR, 2D/3D GRE and SPGR, Angiography: 2D/3D TOF, 2D/3D Phase Contrast; 2D/3D FSE, 2D/3D FGRE and FSPGR, SSFP, FLAIR, EPI, optional: 2D/3D Fiesta, FGRET, Spiral, Tensor,
IMAGING MODES
2D single slice, multi slice, and 3D volume images, multi slab, cine
1 cm to 48 cm continuous
2D 0.7 mm to 20 mm; 3D 0.1 mm to 5 mm
1028 x 1024
MEASURING MATRIX
128x512 steps 32 phase encode
PIXEL INTENSITY
256 gray levels
POWER REQUIREMENTS
480 or 380/415
COOLING SYSTEM TYPE
Closed-loop water-cooled gradient
CRYOGEN USE, L/hr
less than 0.03 L/hr liquid helium
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Signa HDx 3.0T™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.
 
gehealthcare.com/euen/mri/products/signa-hdx-3t/index.html From GE Healthcare;
The Signa HDx MRI system is GE's leading edge whole body magnetic resonance scanner designed to support high resolution, high signal to noise ratio, and short scan times.
Signa HDx 3.0T offers new technologies like ultra-fast image reconstruction through the new XVRE recon engine, advancements in parallel imaging algorithms and the broadest range of premium applications. The HD applications, PROPELLER (high-quality brain imaging extremely resistant to motion artifacts), TRICKS (contrast-enhanced angiographic vascular lower leg imaging), VIBRANT (for breast MRI), LAVA (high resolution liver imaging with shorter breath holds and better organ coverage) and MR Echo (high-definition cardiac images in real time) offer unique capabilities.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Compact short bore
Head and body coil, T/R quadrature head; optional coils e.g., T/R phased array extremity abdomen, spine, breast, knee, shoulder, cardiac imaging coils
SYNCHRONIZATION
ECG/peripheral, respiratory gating
PULSE SEQUENCES
SE, IR, 2D/3D GRE, RF-spoiled GRE, 2DFGRE, 2DFSPGR, 3DFGRE, 3DFSPGR, 3DTOFGRE, 3DFSPGR, 2DFSE, 2DFSE-XL, 2DFSE-IR, T1-FLAIR, SSFSE, EPI, DW-EPI, BRAVO, Angiography: 2D/3D TOF, 2D/3D phase contrast vascular
IMAGING MODES
Single, multislice, volume study, fast scan, multi slab, cine, localizer
1 cm to 40 cm continuous
2D 0.5 mm; 3D 0.1 mm
1024 x 1024
PIXEL INTENSITY
256 gray levels
60 cm
MAGNET WEIGHT
12000 kg
H*W*D
240 x 2216,6 x 201,6 cm
POWER REQUIREMENTS
480 or 380/415, 3 phase ||
COOLING SYSTEM TYPE
Closed-loop water-cooled grad.
0.03 L/hr helium
STRENGTH
23 - 50 mT/m
80 - 150 mT/m/ms
5-GAUSS FRINGE FIELD
2.8 m / 5.0 m
second and high order
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Searchterm 'Magnetic Resonance Imaging MRI' was also found in the following services: 
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PoleStar™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.odinmed.com/site/content/system/benefits.asp From Odin Medical Technologies, Inc.;
the PoleStar™ N-10 is a compact, mobile MRI scanner that mounts to a standard operating room table. The magnets raise into position for imaging, but lower to make surgery easier, and the low magnetic field makes it possible to use many conventional surgical instruments.
When not in use, the PoleStar™ is stored in a nearby closet that allows the room to be used for conventional surgical procedures. The PoleStar™ N-10 is supplied with a fully integrated image guidance system that utilizes intraoperatively acquired images.
The successor, the new PoleStar™ N20 sets a new standard in intraoperative magnetic resonance imaging.
Device Information and Specification
CLINICAL APPLICATION
Intraoperative
CONFIGURATION
Semi-portable open MRI
MAGNET WEIGHT
500 kg
H*W*D
97x139x110 cm
5-GAUSS FRINGE FIELD
1.5 m
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Searchterm 'Magnetic Resonance Imaging MRI' was also found in the following services: 
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ISOL TechnologyMRI Resource Directory:
 - Manufacturers -
 
www.isoltech.co.kr ISOL Technology participated in the pioneering the Korea's MRI development since the early 1980's. In spite of the rapidly changing business environment, and severe competition in the overall medical market, ISOL Technology has grown steadily each year and has established itself as a major provider of Magnetic Resonance(MR) Imaging Systems in Korea.
ISOL Technology also has the largest market share of the domestic bone densitometry equipment sales and is currently in the early stages of development of the 61 channel MCG (Magnetocardiography) system with the R and D funds from the Korean Ministry of Commerce, Industry and Energy.

MRI Scanners:

0.35T to 0.5T:
1.5T:
3T:
Contact Information
MAIL
ISOL Technology
203 Neungpyeong-ri
Opo-eub, Gwangju-si, Gyeonggi-do
Zip Code : 464-892
Korea
PHONE
+82-2-2294-1800
FAX
+82-2-2295-1891
E-MAIL
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Libraries - Implant and Prosthesis pool - Guidance - MRCP - Mass Spectrometry - MRI Technician and Technologist Jobs
 
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