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 'Gradient Echo Multi Slice' 
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MRI Resources 
Crystallography - MRI Technician and Technologist Career - Guidance - Artifacts - Spectroscopy pool - Online Books
 
Signa Infinity 1.5Tâ„¢ with ExciteInfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.gehealthcare.com/usen/mr/s_excite15/index.html From GE Healthcare;
'EXCITE technology has the potential to open the door to new imaging techniques and clinical applications, leaping beyond conventional two and three-dimensional MRI to true 4D imaging that will improve the diagnosis of disease throughout the human body from head to foot.' Robert R. Edelman, M.D., Professor of Radiology at Northwestern University Medical School and Chairman, Department of Radiology, at Evanston Northwestern Healthcare.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Short bore
Head and body coil standard; all other coils optional; open architecture makes system compatible with a wide selection of coils
Optional 2D/3D brain and prostate
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
Localizer, single slice, multislice, volume, fast, POMP, multi slab, cine
TR
1.3 to 12000 msec in increments of 1 msec
TE
0.4 to 2000 msec in increments of 1 msec
SINGLE/MULTI SLICE
Simultaneous scan and reconstruction;; up to 200 or 400 images per second
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
0.08 mm; 0.02 mm optional
MAGNET WEIGHT
3863 kg
H*W*D
172 x 208 x 216 cm
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
STRENGTH
SmartSpeed 23 mT/m, HiSpeed Plus 33 mT/m, EchoSpeed Plus 33 mT/m
5-GAUSS FRINGE FIELD
4.0 m x 2.8 m axial x radial
Active
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MRI Resources 
Education pool - Manufacturers - Coils - Research Labs - MR Myelography - General
 
CHORUS 1.5Tâ„¢InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.isoltech.co.kr/english/product/default.htm 'Next generation MRI system 1.5T CHORUS developed by ISOL Technology is optimized for both clinical diagnostic imaging and for research development.
CHORUS offers the complete range of feature oriented advanced imaging techniques- for both clinical routine and research. The compact short bore magnet, the patient friendly design and the gradient technology make the innovation to new degree of perfection in magnetic resonance.'
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Short bore
Head, C-spine, L-spine, TMJ, Knee, Shoulder, General purpose, Phased Array System: 4 digital receiver channels (Up to 12 channels)
Optional
SYNCHRONIZATION
ECG/peripheral: Optional/yes, respiratory gating
PULSE SEQUENCES
Spin Echo, Gradient Echo, Fast Spin Echo, Inversion Recovery (STIR, Fluid Attenuated Inversion Recovery), FLASH, FISP, PSIF, Turbo Flash ( MPRAGE ),TOF MR Angiography, Standard echo planar imaging package (SE-EPI, GE-EPI), Optional: Advanced P.A. Imaging Package (up to 4 ch.), Advanced echo planar imaging package, Single Shot and Diffusion Weighted EPI, IR/FLAIR EPI
IMAGING MODES
2D/3D, Travelling Sat, Multi-Slab 3D, MTC and TONE Pulse Sequence, Fat/Water Suppression, Presaturation (up to 6 bands), Flow Compensation using GMR pulse, Multi-Slice, Multi-Group Imaging
SINGLE/MULTI SLICE
Image reconstruction time (2562 ) : 0.02 s
FOV
40 cm
BORE DIAMETER
or W x H
58 cm diameter (patient)
MAGNET WEIGHT
4050 kg
H*W*D
233 x 206 x 160 cm
COOLING SYSTEM TYPE
Water-cooled coil and air-cooled amplifier
CRYOGEN USE
0.07 L/hr helium
STRENGTH
20 mT/m (Upto 27 mT/m)
5-GAUSS FRINGE FIELD
2.5 m / 3.8 m
Passive and active
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MRI Resources 
Service and Support - Mobile MRI - Breast MRI - Pacemaker - Stimulator pool - Resources
 
ENCORE 0.5Tâ„¢InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.isoltech.co.kr/english/product/05t.htm 'MRI system is not an expensive equipment anymore. ENCORE developed by ISOL Technology is a low cost MRI system with the advantages like of the 1.0T MRI scanner. Developed specially for the overseas market, the ENCORE is gaining popularity in the domestic market by medium sized hospitals.
Due to the optimum RF and Gradient application technology. ENCORE enables to obtain high resolution imaging and 2D/3D Angio images which was only possible in high field MR systems.'
- Less consumption of the helium gas due to the ultra-lightweight magnet specially designed and manufactured for ISOL. - Cost efficiency MR system due to air cooling type (equivalent to permanent magnetic). - Patient processing speed of less than 20 minutes.'
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Short bore compact
Head, C-spine, L-spine, TMJ, Knee, Shoulder, General purpose, Phased Array System: 4 digital receiver channels (Up to 12 channels)
SYNCHRONIZATION
ECG/peripheral: Optional/yes, respiratory gating
SINGLE/MULTI SLICE
Image reconstruction time (2562 ) : 0.02 s
FOV
40 cm
BORE DIAMETER
or W x H
58 cm diameter
MAGNET WEIGHT
3200 kg
H*W*D
200 x 168 x 187 cm
COOLING SYSTEM TYPE
Air-cooled coil and amplifier
CRYOGEN USE
0.05 L/hr helium
STRENGTH
15 mT/m
5-GAUSS FRINGE FIELD
2.3 m / 3.1 m
Passive and active
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• View the DATABASE results for 'ENCORE 0.5T™' (2).Open this link in a new window

MRI Resources 
Databases - Hospitals - Distributors - Lung Imaging - Implant and Prosthesis - Calculation
 
2 Dimensional Time of Flight Magnetic Resonance AngiographyInfoSheet: - Sequences - 
Intro, 
Overview, 
Types of, 
etc.MRI Resource Directory:
 - MRA -
 
(2D TOF MRA) This form of MR angiography is based on the acquisition of multiple, short-TR, gradient echo single slice images. 2D TOF MRA is the preferred technique for visualizing slow flow, how for example it happens in veins. 2D TOF MRA consists of multiple sequentially-acquired single slices, therefore the saturation effects are minimized.
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MRI Resources 
Journals - Non-English - MRI Technician and Technologist Jobs - Liver Imaging - PACS - Shielding
 
Diffusion Weighted ImagingForum -
related threadsMRI Resource Directory:
 - Diffusion Weighted Imaging -
 
(DWI) Magnetic resonance imaging is sensitive to diffusion, because the diffusion of water molecules along a field gradient reduces the MR signal. In areas of lower diffusion the signal loss is less intense and the display from this areas is brighter. The use of a bipolar gradient pulse and suitable pulse sequences permits the acquisition of diffusion weighted images (images in which areas of rapid proton diffusion can be distinguished from areas with slow diffusion).
Based on echo planar imaging, multislice DWI is today a standard for imaging brain infarction. With enhanced gradients, the whole brain can be scanned within seconds. The degree of diffusion weighting correlates with the strength of the diffusion gradients, characterized by the b-value, which is a function of the gradient related parameters: strength, duration, and the period between diffusion gradients.
Certain illnesses show restrictions of diffusion, for example demyelinization and cytotoxic edema. Areas of cerebral infarction have decreased apparent diffusion, which results in increased signal intensity on diffusion weighted MRI scans. DWI has been demonstrated to be more sensitive for the early detection of stroke than standard pulse sequences and is closely related to temperature mapping.
DWIBS is a new diffusion weighted imaging technique for the whole body that produces PET-like images. The DWIBS sequence has been developed with the aim to detect lymph nodes and to differentiate normal and hyperplastic from metastatic lymph nodes. This may be possible caused by alterations in microcirculation and water diffusivity within cancer metastases in lymph nodes.

See also Diffusion Weighted Sequence, Perfusion Imaging, ADC Map, Apparent Diffusion Coefficient, and Diffusion Tensor Imaging.
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• View the NEWS results for 'Diffusion Weighted Imaging' (4).Open this link in a new window.
 
Further Reading:
  Basics:
EVALUATION OF HUMAN STROKE BY MR IMAGING
2000
Novel MRI Technique Could Reduce Breast Biopsies, University of Washington Study
Tuesday, 2 October 2012   by www.eurekalert.org    
Quantitative Apparent Diffusion Coefficient Measurements Obtained by 3-Tesla MRI Are Correlated with Biomarkers of Bladder Cancer Proliferative Activity
   by www.plosone.org    
  News & More:
Stability and repeatability of diffusion-weighted imaging (DWI) of normal pancreas on 5.0 Tesla magnetic resonance imaging (MRI)
Monday, 24 July 2023   by www.nature.com    
MRI innovation makes cancerous tissue light up and easier to see
Monday, 21 March 2022   by www.sciencedaily.com    
Diffusion MRI and machine learning models classify childhood brain tumours
Saturday, 6 March 2021   by physicsworld.com    
Diffusion-weighted MRI in Advanced Epithelial Ovarian Cancer: Apparent Diffusion Coefficient as a Response Marker
Tuesday, 1 October 2019   by pubs.rsna.org    
Novel Imaging Technique Improves Prostate Cancer Detection
Tuesday, 6 January 2015   by health.ucsd.edu    
High-b-value Diffusion-weighted MR Imaging of Suspected Brain Infarction
2000   by www.ajnr.org    
MRI Resources 
Raman Spectroscopy - Contrast Agents - Quality Advice - Sequences - Research Labs - Coils
 
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MRI is trending to low field magnets :
reduced costs will lead to this change 
AI will close the gap to high field 
only in remote areas 
is only temporary 
never 

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