1.5t MRI Superconducting Magnetic Resonance Imaging System

1.5T active shield superconducting magnet
Gradient System (Performance Controls Incorporation, USA)
RF System: Spectrometer: All-digital (MR Solutions Ltd., UK)
RF Amplifier: Peak power:18KW (Analogic, USA)
Transmitting Coil
Computer system: CPU: dual core ≥2.8GHz; RAM: ≥2GB; Hard disk: ≥500GB Main display: ≥24´´LCD TFT monitoring
Console: New communication user software interface, bilingual choice Operation system: Windows XP Professional Monitoring devices, machine monitoring, patient monitoring, multi-parameter monitoring


Ref: MKT-20160815
No. Item Specification
1 Magnet System
1.1 Magnet Type Superconductive
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)
1.6.1 45cm ≤0.832ppm
1.6.2 40cm ≤0.323ppm
1.6.3 30cm ≤0.107ppm
1.6.4 20cm ≤0.041ppm
1.6.5 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

Maximum gradient field (single axis, invalid) 41mT/m
2.2
Maximum gradient slew rate(single axis,
invalid)
187mT/m/ms
2.3 Minimum gradient rise time 0.22ms
2.4
Maximum gradient field and slew rate reached
at the same time
Yes
2.5 Gradient cooling system Water cooling
2.6
Full 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 Yes