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 'Single Volume Spectroscopy' 
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Single Volume Spectroscopy
 
(SVS) This method maps the metabolic information from the VOI in a spectrum. Single volume techniques are advantageous in case of pathological changes that cannot spatially be limited to a few VOI; by using local volume sensitive shim the local magnetic field inhomogeneity can be compensated.
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Further Reading:
  Basics:
MRI evaluation of fatty liver in day to day practice: Quantitative and qualitative methods
Wednesday, 3 September 2014   by www.sciencedirect.com    
MRI Resources 
MRI Reimbursement - Shielding - RIS - MRI Technician and Technologist Jobs - Mobile MRI - Quality Advice
 
Hybrid Spectroscopy
 
The combination of single volume spectroscopy and chemical shift imaging. The chemical shift measurement is performed over a selectively-excited volume of interest. Areas with strong distorting signal are not stimulated and therefore do not append signal to the spectra.

See also Hybrid Imaging.
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Further Reading:
  News & More:
Near-IR Spectroscopy Performs Challenging Breast Imaging
Tuesday, 18 February 2014   by www.novuslight.com    
MRI Resources 
Health - Bioinformatics - Safety Training - Quality Advice - Guidance - MRCP
 
MAGNETOM ESSENZA
 
www.healthcare.siemens.com/magnetic-resonance-imaging/0-35-to-1-5t-mri-scanner/magnetom-essenza/ From Siemens Medical Systems;
Received FDA clearance in 2007.
The MAGNETOM Essenza is designed to combine high system performance with simple installation and power requirements to provide optimal operating costs for limited budgets. The standard system has up to 25 integrated coil elements and 8 independent radio frequency channels. Tim allows the combination of up to 4 different coils that reduce patient and coil repositioning.
The 1.5 Tesla system is designated for a complete range of clinical applications, including neurology, orthopedics, body imaging, angiography, cardiology, breast imaging, oncology and pediatric MRI.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Ultra-short bore
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, 16
Chemical shift imaging and single volume spectroscopy
IMAGING TECHNIQUES
iPAT, mSENSE and GRAPPA (image, k-space), noncontrast angiography, radial motion compensation
MINIMUM TR
3-D GRE: 1.58 (256 matrix)
MINIMUM TE
3-D GRE: 0.5 (256 matrix)
FOV
0.5 - 45 cm
BORE DIAMETER
or W x H
At isocenter: 60 cm
TABLE CAPACITY
200 kg
MAGNET WEIGHT (gantry included)
4350 kg in operation
DIMENSION H*W*D (gantry included)
145 x 226 x 216 cm
5-GAUSS FRINGE FIELD
2.5 m / 4.0 m
CRYOGEN USE
Zero boil off rate, approx. 10 years
COOLING SYSTEM
Water; single cryogen, 2 stage refrigeration
up to 100 T/m/s
30 mT/m, 300 msec to 10 mT/m
Passive, active; first order standard second order optional
POWER REQUIREMENTS
380 / 400 / 420 / 440 / 460 / 480 V, 3-phase + ground; 45 kVA
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MRI Resources 
Spectroscopy pool - Claustrophobia - Shielding - Raman Spectroscopy - Coils - Directories
 
Stimulated Echo Acquisition Mode
 
(STEAM) A single volume spectroscopy method. The stimulated echo acquisition mode techniques is similar to Point Resolved Spectroscopy (PRESS). The STEAM sequence use a 90°-90°-90° pulse sequence instead of 90°-180°-180° pulses.
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• View the DATABASE results for 'Stimulated Echo Acquisition Mode' (2).Open this link in a new window

 
Further Reading:
  News & More:
MRI evaluation of fatty liver in day to day practice: Quantitative and qualitative methods
Wednesday, 3 September 2014   by www.sciencedirect.com    
MRI Resources 
Manufacturers - MRI Technician and Technologist Schools - Safety Training - Research Labs - PACS - Mobile MRI Rental
 
Signa SP 0.5T™ Open ConfigurationInfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
www.gehealthcare.com/usen/mr/index.html From GE Healthcare;
The Signa SP 0.5T™ is an open MRI magnet that is designed for use in interventional radiology and intra-operative imaging. The vertical gap configuration increases patient positioning options, improves patient observation, and allows continuous access to the patient during imaging. The magnet enclosure also incorporates an intercom, patient observation video camera, laser patient alignment lights, and task lighting in the imaging volume.
Device Information and Specification
CLINICAL APPLICATION
Whole body
CONFIGURATION
Open
Integrated transmit and receive body coil; optional rotational body coil, head; other coils optional; open architecture makes system compatible with a wide selection of coilsarray
SYNCHRONIZATION
Standard cardiac gating, ECG/peripheral, respiratory gating
PULSE SEQUENCES
Standard: SE, IR, 2D/3D GRE and SPGR, 2D/3D TOF, 2D/3D FSE, 2D/3D FGRE and FSPGR, SSFP, FLAIR, EPI, optional: 2D/3D Fiesta, true chem sat, fat/water separation, single shot diffusion EPI
IMAGING MODES
Localizer, single slice, multislice, volume, fast, POMP, multi slab, cine, slice and frequency zip, extended dynamic range, tailored RF
TR
1.3 to 12000 msec in increments of 1 msec
TE
0.4 to 2000 msec in increments of 1 msec
3cm to 40 cm continuous
2D: 1.4mm - 20mm 3D: 0.2mm - 20mm
1280 x 1024
MEASURING MATRIX
128x512 steps 32 phase//freq.
PIXEL INTENSITY
256 gray levels
60 x 58 cm
POWER REQUIREMENTS
200 - 480, 3-phase
COOLING SYSTEM TYPE
Liquid helium
0.03 L/hr, holds 300 L
STRENGTH
12 mT/m
Active
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• View the DATABASE results for 'Signa SP 0.5T™ Open Configuration' (2).Open this link in a new window

 
Further Reading:
  News & More:
MR Surgical Suite, Improving surgical procedure quality (.pdf)
   by www3.gehealthcare.com    
MRI Resources 
MRI Technician and Technologist Career - Fluorescence - Shielding - Resources - Contrast Enhanced MRI - Mobile MRI Rental
 
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