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Signa HDe 1.5T™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.
 
From GE Healthcare;
www.vitalcom.com/euen/mri/products/signa-hde-15t/index.html 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
SURFACE COILS Head and body coil standard; all other coils optional e.g., abdomen, spine, breast, knee, shoulder, cardiac imaging coils
SPECTROSCOPY 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
FOV 1 cm to 48 cm continuous
SLICE THICKNESS 2D 0.7 mm to 20 mm; 3D 0.1 mm to 5 mm
DISPLAY MATRIX 1028 x 1024
MEASURING MATRIX 128x512 steps 32 phase encode
PIXEL INTENSITY 256 gray levels
MAGNET TYPE Superconducting
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
FIELD STRENGTH 1.5 T
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Further Reading:
  Basics:
Signa HDe 1.5T
   by www.gehealthcare.com/    
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Panorama 0.23T™InfoSheet: - Devices -
Intro, 
Types of Magnets, 
Overview, 
etc.MRI Resource Directory:
 - Devices -
 
From Philips Medical Systems;
www.medical.philips.com/main/products/mri/products/panoramafamily/panorama0.23t_rt/features/ the Panorama 0.23 T, providing a new design optimized for patient comfort, faster reconstruction time than before (300 images/second) and new gradient specifications. Philips' Panorama 0.23 T I/T supports MR-guided interventions, resulting in minimally invasive procedures, more targeted surgery, reduced recovery time and shorter hospital stays. Optional OptoGuide functionality enables real-time needle tracking. Philips' Panorama 0.23 T™ R/T is the first and only open MRI system to enable radiation therapy planning using MR data sets. The Panorama also features the new and consistent Philips User Interface, an essential element of the Vequion clinical IT family of products and services.

Device Information and Specification
CLINICAL APPLICATION Whole body
CONFIGURATION Open MRI/C-arm
SURFACE COILS Head, head-neck, extremity M-L, neck, body/spine S-XL, shoulder, bilateral breast, wrist, TMJ, flex XS-S-M-L-XL-XXL
SPECTROSCOPY No
SYNCHRONIZATION ECG/peripheral: Optional/optional, respiratory gating
PULSE SEQUENCES SE, FE, IR, FFE, DEFFE, DESE, TSE, DETSE, Single shot SE, DRIVE, Balanced FFE, MRCP, Fluid Attenuated Inversion Recovery, Turbo FLAIR, IR-TSE, T1-STIR TSE, T2-STIR TSE, Diffusion Imaging, 3D SE, 3D FFE, MTC;; Angiography: CE-ANGIO, MRA 2D, 3D TOF
IMAGING MODES Single, multislice, volume study, dynamic, SIMEX, multi chunk 3D, multiple stacks
TR Min. 6.2 msec
TE Min. 2.8 msec
SINGLE/MULTI SLICE 50 slices/sec
FOV 0.4 cm - 40 cm
SLICE THICKNESS 0.4 mm
DISPLAY MATRIX 1280 X 1024
MEASURING MATRIX Up to 512 x 512
PIXEL INTENSITY 256 gray scale
SPATIAL RESOLUTION 0.78 mm
MAGNET TYPE Resistive/iron core
BORE DIAMETER
or W x H
Open x 46 cm x infinite (side-first patient entry)
MAGNET WEIGHT 13110 kg
H*W*D 196 x 121 x 176 cm
POWER REQUIREMENTS 400/480 V
COOLING SYSTEM TYPE Closed loop chilled water (chiller included)
CRYOGEN USE N/A
FIELD STRENGTH 0.23 T
STRENGTH 19 mT/m
5-GAUSS FRINGE FIELD 2.4 m / 3.7 m
SHIMMING Passive/active
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Further Reading:
  News & More:
Magnetic resonance imaging guided musculoskeletal interventions at 0.23T: Chapter 4. Materials and methods
2002
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