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Result : Searchterm 'Spectroscopy' found in 12 terms [] and 83 definitions []
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Searchterm 'Spectroscopy' was also found in the following services: 
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News  (16)  Resources  (59)  Forum  (3)  
 
MAGNETOM Symphony™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.med.siemens.com/med/d/gg/mr/products/symphony1.html From Siemens Medical Systems;
with the introduction of this system, it is possible to perform contrast MR angiography for abdominal, thoracic and neck vessels from the origins to the circle of Willis. The system also has many newer features including functional imaging, spectroscopy, advanced body, ortho- and neuroimaging.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Compact
Yes/SVS or CSI opt.
SYNCHRONIZATION
ECG/peripheral, respiratory gating
PULSE SEQUENCES
GRE, IR, FIR, STIR, TrueIR/FISP, FSE, FLAIR, MT, SS-FSE, MT-SE, MTC, MSE, EPI, GMR, fat/water sat./exc.
IMAGING MODES
Single, multislice, volume study, multi angle, multi oblique
TR
2.4 msec std.; 2.0 opt.; 1.8 w/30 mT/m at 256matrix
TE
1.1 msec std.; 0.9 opt.; 0.78 w/30 mT/m at 256matrix
SINGLE/MULTI SLICE
178 images/sec at 256 x 256 at 100% FOV
0.5 cm - 50 cm
Min 2D/3D: 0.1/0.05 mm
1024 x 1024 full screen display
MEASURING MATRIX
64 x 64 to 1024 x 1024
PIXEL INTENSITY
21 micrometer in plane, 11 micrometer optional
60 cm
MAGNET WEIGHT
4050kg, 5500kg in operation
H*W*D
236 x 215 x 160 cm w/covers
POWER REQUIREMENTS
380/400/420/440/480 V
COOLING SYSTEM TYPE
Single cryogen, 2 stage refrig.
Liquid He
STRENGTH
20/35 mT/m standard, 30/52 opt.
5-GAUSS FRINGE FIELD
2.5 m / 4.0 m
Passive, act.; 1st order std./2nd opt.
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• Related Searches:
    • MRI Equipment
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    • Device
    • Open MRI
    • Low Field MRI
 
Further Reading:
  Basics:
Symphony Brochure(.pdf)
Searchterm 'Spectroscopy' was also found in the following service: 
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Radiology  (1) Open this link in a new window
MAGNETOM Verio
 
www.healthcare.siemens.com/magnetic-resonance-imaging/3t-mri-scanner/magnetom-verio From Siemens Medical Systems;
Received FDA clearance in 2007.
The MAGNETOM Verio provides up to 102 integrated matrix coil elements and up to 32 independent radiofrequency channels that allow flexible coil combinations to make patient and coil repositioning virtually unnecessary. The Tim (total imaging matrix) technology also increases patient throughput due to a shorter scan time.
The open bore design offers great comfort for patients of all shapes and sizes.
Device Information and Specification
CLINICAL APPLICATION
Whole Body
CONFIGURATION
Ultra-short open bore
3 Tesla
Head, spine, torso/ body coil, neurovascular, cardiac, neck and multi-purpose flex coils. Peripheral vascular, breast, shoulder, knee, wrist, foot//ankle, TMJ optional.
CHANNELS (min. / max. configuration)
8, 18, 32
Chemical shift imaging, single voxel spectroscopy
IMAGING TECHNIQUES
iPAT, mSENSE and GRAPPA (image, k-space), noncontrast angiography, radial motion compensation, Dixon
MINIMUM TR
3-D GRE: 1.5 (256 matrix)
MINIMUM TE
3-D GRE: 0.63 (256 matrix)
FOV
0.5 - 50 cm
BORE DIAMETER
or W x H
At isocenter: L-R 70 cm, A-P 55 cm
TABLE CAPACITY
250 kg
MAGNET WEIGHT (gantry included)
8200 kg
DIMENSION H*W*D (gantry included)
173 x 230 x 222 cm
5-GAUSS FRINGE FIELD
2.6 m / 4.6 m
CRYOGEN USE
Zero boil off rate, refill approx. 10 years
COOLING SYSTEM
Water
up to 200 T/m/s
MAX. AMPLITUDE
45 mT/m
Passive, active; first order, second order standard
POWER REQUIREMENTS
380 / 400 / 420 / 440 / 460 / 480 V, 3-phase + ground; 110 kVA
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MRI Resources 
Equipment - Veterinary MRI - Breast Implant - Case Studies - Safety pool - MRI Physics
 
Sensitive Point
 
The sensitive point in an object (or a region) is the point from which information is being measured, as in sequential point imaging or in single voxel MR spectroscopy sequential point imaging used. To define a sensitive point, it must be selected in three dimensions. Different combinations of selective excitation, inversion, or saturation pulses can be used. Sometimes, combinations of two or more measurements are necessary to define the sensitive point (or volume).

See also Magnetic Resonance Spectroscopy.
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• View the DATABASE results for 'Sensitive Point' (3).Open this link in a new window

Searchterm 'Spectroscopy' was also found in the following services: 
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News  (16)  Resources  (59)  Forum  (3)  
 
Signa HDe 1.5T™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.
 
www.vitalcom.com/euen/mri/products/signa-hde-15t/index.html From GE Healthcare;
GE Healthcare has added the Signa HDe 1.5T™, a compact MRI device at an affordable price to its family of MRI products. It has a single electronic cabinet that can be positioned inside the scanner room rather than in a separate equipment room. The Signa HDe 1.5T can be installed in the same physical location as 0.5T MRI systems with minimal construction costs. According to GE, the installation has been simplified to last only 7 days and has a 30 percent smaller footprint than a typical 1.5T system.
The 1.5T Signa™ HDe MRI system is substantially equivalent to the currently marketed GE 1.5T machines. The data acquisition system supports 1, 4, 8 independent receive channels and multiple independent coil elements per channel during a single acquisition series. The gradient specifications of HDe are lower than other GE Signa 1.5T MRI systems, but it can support clinical applications in cardiac and spectroscopy imaging.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Compact short bore
Head and body coil standard; all other coils optional e.g., abdomen, spine, breast, knee, shoulder, cardiac imaging coils
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
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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• View the NEWS results for 'Signa HDe 1.5T™' (1).Open this link in a new window.
 
Further Reading:
  Basics:
Signa HDe 1.5T
   by www.gehealthcare.com/    
Searchterm 'Spectroscopy' was also found in the following service: 
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Radiology  (1) Open this link in a new window
Special ImagingInfoSheet: - Sequences - 
Intro, 
Overview, 
Types of, 
etc.
 
Special imaging primarily means advanced MRI techniques used for qualitative and quantitative measurement of biological metabolism as e.g., spectroscopy, perfusion imaging (PWI, ASL), diffusion weighted imaging (DWI, DTI, DTT) and brain function (BOLD, fMRI). This physiological magnetic resonance techniques offer insights into brain structure, function, and metabolism.
Spectroscopy provides functional information related to identification and quantification of e.g. brain metabolites. MR perfusion imaging has applications in stroke, trauma, and brain neoplasm. MRI provides the high spatial and temporal resolution needed to measure blood flow to the brain. arterial spin labeling techniques utilize the intrinsic protons of blood and brain tissue, labeled by special preparation pulses, rather than exogenous tracers injected into the blood.
MR diffusion tensor imaging characterizes the ability of water to spread across the brain in different directions. Diffusion parallel to nerve fibers has been shown to be greater than diffusion in the perpendicular direction. This provides a tool to study in vivo fiber connectivity in brain MRI.
FMRI allows the detection of a functional activation in the brain because cortical activity is intimately related to local metabolism changes.

See also Diffusion Tensor Tractography.
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• View the NEWS results for 'Special Imaging' (14).Open this link in a new window.
 
Further Reading:
  Basics:
MRI's inside story
Thursday, 4 December 2003   by www.economist.com    
Diffusion Imaging: From Basic Physics to Practical Imaging
1999   by ej.rsna.org    
  News & More:
Philips and University Medical Center Utrecht Partner to Advance Quantitative MRI With MR-STAT
Monday, 10 August 2020   by www.itnonline.com    
This new 'whole body' MRI is better for cancer patients
Tuesday, 28 January 2014   by www.physiciansnews.com    
Turbo-FLASH Based Arterial Spin Labeled Perfusion MRI at 7 T
Thursday, 20 June 2013   by www.plosone.org    
Multiparametric MRI for Detecting Prostate Cancer
Wednesday, 17 December 2014   by www.onclive.com    
MRI Resources 
Databases - Intraoperative MRI - Contrast Enhanced MRI - Blood Flow Imaging - Software - Veterinary MRI
 
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