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Magnet Specifications

Human Systems

Siemens Prisma 3.0 Tesla / 60 cm System

Magnet

Magnetic field strength 2.893620 Tesla (123.256491 MHz for proton)
Manufacturer Siemens Medical Solutions, Inc.
Magnet homogeneity at 40 cm DSV – 0.25 ppm
Imaging FoV – 50x50x50 cm
bore diameter 60 cm
Magnet length 213 cm
Distance to isocenter 1200 mm

Gradient coils

Manufacturer Siemens Medical Solutions, Inc.
GC Type = AS82
GC FoVMax[mm] = 500
GC AcousticResonanceFrequency[0][Hz] = 590
GC AcousticResonanceBandwidth[0][Hz] = 100
GC AcousticResonanceFrequency[1][Hz] = 1140
GC AcousticResonanceBandwidth[1][Hz] = 220

RF amplifiers

Broadband amplifier
Manufacturer Siemens Medical Solutions, Inc.
Model Type DirectRF
Max Peak Power 50KWatts
Frequency range Multiple Nucleus Options:
1H [MHz] = 123.256491
3He [MHz] =93.895425
7Li [MHz] =47.901900
13C [MHz] =30.994841
19F [MHz] = 115.957156
23Na [MHz] =32.603462
31P [MHz] =49.894744
129Xe [MHz] =34.097230
17O [MHz] =16.708809
Peak power RFPA[0]/RFPA[1] 1H [W] = 16200/24200, RFPA[2] x-nuclei [W] = 6800/5800

Gradient power amplifiers

High-Performance MR Gradient System XR 80/200 Manufacturer Siemens Medical Solutions, Inc.
GPA Type = K2309_2250V_951A
GPA GradMaxAmplAbsolute[mT/m] = 80
GPA GradMaxAmplNominal[mT/m] = 34
GPA GradMaxAmpl[mT/m] = 37 / 24 / 22 / 22
GPA GradMinRiseTimeAbsolute[us/(mT/m)] = 5
GPA GradMinRiseTime[us/(mT/m)] = 5.3 / 5.55 / 10 / 20
GPA GradClipRiseTime[us/(mT/m)] = 1
GPA GradMaxSlewRateAbsolute[mT/(m*ms)] = 200
GPA GradMaxSlewRate[mT/(m*ms)] = 188.679 / 180.18 / 100 / 50
GPA GradClipSlewRate[mT/(m*ms)] = 1000
Voltage / current 2250 V/900 A

Shimming

Manufacturer Siemens Medical Solutions, Inc.
Standard active himming with 3 linear channels (1st order)
2nd-order shimming with 5 non-linear channels
Passive shimming
Dynamic Shim Controller N/A

Console - Platform / software

  • Prisma A Windows 7/VE11C
  • Prisma B Windows 7/VE11B
  • Prisma C Windows 7/VE11E

Receiver Channels: 20/32/64 head/neck, 18 body, 32 spine, 4 flex, and other phased array for torso and limbs

Bruker 4.0 Tesla / 94 cm System

W.M. Keck High Field Magnetic Resonance Laboratory

Animal Systems

Varian 11.74T - 11.74 Tesla / 21 cm system

Magnet
Magnetic field strength 11.74 Tesla (499.8 MHz for proton)
Manufacturer Magnex Scientific Ltd.
Magnetic bore size 210 mm
Cryostat dimensions (HxWxL) 2380/1720/1800 mm
Distance to isocenter 900 mm
Gradients
Manufacturer Magnex Scientific Ltd.
Outer / inner diameter 205 / 90 mm
Maximum gradient strength 400 mT/m
Gradient rise time 150 us
RF amplifiers
1H/19F Amplifier
Manufacturer Communication Power Corporation
Model number 12T500P
Frequency range 460-510 MHz
Peak power 500 W
XN Amplifier
Manufacturer AMT
Model number 3304
Frequency range 30-310 MHz
Peak power 400 W
Gradient amplifiers
Manufacturer Techron 8607
Voltage / current 150 V/130 A
Shim amplifiers
Manufacturer Resonance Research Inc.
Voltage / current 15 V/4 A
Console
Manufacturer Varian
Platform / software DirectDrive / VNMRJ 2.3A
Receiver Channels 4

High Resolution Systems

Bruker 500MHz - Avance 500 MHz system

Magnet
Magnetic field strength 11.74 Tesla (500.2 MHz for proton)
Manufacturer Oxford Instruments
Magnetic bore size 51 mm
Gradients
Manufacturer Bruker
Model Triple axis Accustar II
RF amplifiers
F1
Manufacturer Bruker
Model number BLAXH50 amplifier array
Frequency range 1H/19F
Peak power 50 W
or
Frequency range

6-242 MHz
Peak power 300 W
F2
Manufacturer Bruker
Model number BLAX 300 RS decouple
Frequency range X-nucleus
Peak power 300 W
Gradient amplifiers
Manufacturer Bruker
Voltage / current 40 V/10 A
Shim amplifiers
Manufacturer Bruker BSMS2
Voltage / current 22 V/1 A
Console
Manufacturer Bruker
Platform / software Avance DRX/Xwin 3.0
Receiver Channels 1