Resonancia Magnética 1.5T Libre de Helio

 
 
Magnet System
1.1 Magnet Type Superconducting
1.2 Field Strength 1.5T
1.3 Shielding Method Active
1.4 Shimming Method and Type
Active + Passive +
Dynamic
1.5 Magnet stability ≤0.1ppm/h
1.6 Homogeneity (DSV, VRMS)
10cm ≤0.01ppm
1.7 Length of magnet(exclude cover) 157cm
1.8 Inner diameter of magnet 600mm
1.9 5 Gauss fringe field(X，Y，Z axis) ≤2.5m x 2.5m x 4.0m
1.10 Liquid helium No need
 
2 Gradient System
2.1 Maximum gradient field （single axis, invalid） 41mT/m
Maximum gradient slew rate（single
2.2
axis,
invalid）
187mT/m/ms
2.3 Minimum gradient rise time 0.22ms
2.4 Maximum gradient field and slew rate reached Yes
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at the same time
2.5 Gradient cooling system Water cooling
2.6Full digital real-time transmit and receiving
gradient control system
Yes
 
3 RF System
3.1 Max RF amplifier power 18kW
3.2 Center frequency 63.87MHz
3.3 Real-time digital RF energy monitoring Yes
3.4
Real-time digital RF short-term accumulation
monitoring
Yes
3.5
Real-time digital RF long-term accumulation
monitoring
Yes
3.6 Parallel working RF receiver channels 8/16
3.7 Parallel working RF A/D converters 8/16
3.8 Each coil unit has corresponding pre-amplifier Yes
3.9 Parallel acquisition technology platform Yes
3.10
Maximum bandwidth of each parallel
acquisition receive channels
≥1.0MHz
3.11 Transmission bandwidth 550kHz
3.12 Maximum receiver signal resolution ≥16bit
3.13 Fully digital RF system Yes
3.14 RF receiving amplifier noise level ≤0.45dB
3.15 Multi-channel phased array receiver coil
 
4 Scan environment
4.1 Patient table driven mode Motor-driven
4.2 Position accuracy ≤0.5mm
4.3 Table length 2400mm
4.4 Horizontal movement range 2055mm
4.5 Horizontal motion maximum speed ≥200mm/s
4.6 Patient table lowest height 675mm
4.7 Maximum patient weight 225kg
4.8 Feet-first entry mode Yes
4.9
Table can be controlled by machine cover in
case of emergency
Yes
4.10 Table control system on both side of rack Yes
4.11 Lighting, ventilation, call system Be able to adjust
 
5 Computer system
5.1 MRI software 
5.2 System software WINDOWS 7
5.3 CPU ≥3.1GHz
5.4 Main memory ≥4GB
5.5 Hard disk ≥500GB
5.6 Color LCD monitor 24”
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5.7 Monitor resolution 1920×1200
5.8 External storage DVD/USB
5.9 DICOM3.0 Yes
 
6 Scanning parameter
6.1 Spin-echo sequence Yes
6.1.1 SE 2D/3D Yes
6.1.2 FSE 2D/3D Yes
6.1.3 FSE sharing Yes
6.1.4 Single shot FSE Yes
6.1.5 Spin echo fat-suppression imaging Yes
6.1.6 Spin echo frequency fat suppression imaging Yes
6.1.7 Spin echo water suppression imaging Yes
6.2 GRE 2D/3D Yes
6.3 DWI Yes
6.3.1 Max. b value 10000
6.4 IR sequence Yes
6.4.1 IR Yes
6.4.2 FIR(water / fat suppression) Yes
6.4.3 FLAIR Yes
6.4.4 STIR Yes
6.4.5 Water-fat Separation Yes
6.5.1 Pre-saturation Yes
6.6 Gating Yes
6.7 Accelerated sequence Yes
6.8 Anti-movement scanning technology Yes
6.9 Min. 2D thickness 0.1mm
6.10 Min. 3D thickness 0.05mm
6.11 Max. FOV 50cm
6.12 Min. FOV 1cm
 
7 Advanced imaging technology
7.1 Body Imaging Yes
7.1.1 Ultra-fast imaging technology Yes
7.1.2 Phase / de-phase imaging technology Yes
7.1.3 MR cholangiopan-creatography (MRCP) Yes
7.1.4 MR urography (MRU) Yes
7.1.5 MR Myelography (MRM) Yes
7.2 Neuro imaging Yes
7.3 Diffusion weighted imaging set Yes
7.3.1 Isotropic acquisition Yes
7.3.2 ADC measurement Yes
7.4 MR angiography(MRA) Yes
7.4.1 2D/3D TOF technology Yes
7.4.2 Continuous multi-layer 3D TOF technology Yes
7.4.3 Contrast enhanced MRA Yes
7.4.4 Magnetization transfer (MTC) Yes
7.4.5 Maximum intensity projection Yes
7.5 Susceptibility weighted imaging (SWI) Yes
7.6 Parallel acquisition technology Yes
7.6.1 Algorithm based on image Yes
7.6.2 Algorithm based on K-space Yes
7.6.3 Max. parallel acquisition acceleration factor 4
7.6.4 Automatic calibration technology Yes
7.6.5 Applied direction of parallel acquisition factor X、Y、Z
7.7 Artifact correction technology Yes
7.7.1 Fluid compensation Yes
7.7.2 Respiratory compensation Yes
7.7.3 Head motion artifact correction Yes
7.7.4 Elimination of magnetic sensitive artifact Yes
7.7.5 Eddy current adaptive correction Yes
7.7.6 Gradient linearity correction Yes
7.7.7 Multi-echo phase correction Yes
7.8 Rapid automatic correction technology Yes
7.9 Automatic frequency tracking technology Yes
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7.10 Automatic coil recognition technology Yes
7.11 Automatic phase correction technology Yes
7.12 Echo navigation technology Yes
7.13 RF balance drive technology Yes
7.14 RF de-phase technology Yes
7.15 Gradient de-phase technology Yes
7.16 Section scanning technology Yes