Department 8.1
Medical Metrology
3-T Bruker 1995 - 2009
3-tesla MRI scanner
PTB's Bruker Medspec 30/100 whole-body scanner
| Manufacturer | Bruker |
| Year of installation | 1996 |
| Static field | 2.94 T |
| Gradients | 25 mT/m in 180 µs, alternatively 30 mT/m in 400 µs |
| 1H frequency | 125.319 MHz |
| Mass | 13.5 t |
| Inductance | 300 H |
| Electrical current | 250 A |
| He reservoir | 1000 L |
| ΔB0/B0 | ±1.5 ppm (ø 45 cm) |
| Drift | 2 ppm/a |
Multi-channel transmit and receive system
| Manufacturer | Bruker |
| Channels | 4 |
| Frequency range | 30 − 130 MHz |
| RF amplifiers | Dressler LPPA 13040W |
| Peak power | max. 4 kW / channel |
| Special features | each channel individually programmable in amplitude, frequency, and phase |
| 4-channel RF supervisor for patient safety | |
| Year of installation | 2002 |
Receive system
| Manufacturer | Bruker |
| Channels | 4 |
| Frequency range | 5 - 300 MHz |
| ADC bandwidth | 1 MHz |
| Data transfer rate | 1.4 MB/s to host computer |
| Year of installation | 1999 |
Insert gradient coil for neurological studies
The removable head gradient coil in front of the scanner tunnel
| Type | Siemens AC 44, adapted by Bruker |
| Year of installation | 2006 |
| Inner diameter | 340 mm |
| max. gradient strength | 46 mT/m (at 500 A) |
| Rise time | 100 µs |
| Slew rate | 400 T/m/s |
| Mass | 350 kg |
| Power supply | 500 A, 2000 V (Siemens Sonata) |
| Mount/dismount time | about 20 min each |
| Applications | fast neuro-imaging (EPI, DTI, ASL, ...) |
Radio-frequency coils (selection)
| Description | Manufacturer | Type | Properties |
| Whole-body resonator | Bruker | Tx/Rx | 4-rung quadrature coil, also suitable for 4-channel Tx/Rx-array operation |
| Standard head coil | Bruker | Tx/Rx | 12-rung CP birdcage |
| 1H surface coil | Home built | Tx/Rx | Surface coil 15 cm x 20 cm |
| 1H CSA element | Home built | Tx/Rx | Surface coil 8 cm x 16 cm |
| 129Xe/1H head coil | Rapid Biomedical | Tx/Rx | 16-rung birdcage, one linear polarization mode each for 129Xe and 1H |
| 4-channel head array | Home built | Tx/Rx | Array of 4 CSA elements, max. 4 kW per channel |
| 12-channel head array | Home built/Leipzig univ. | Tx/Rx | Volume coil, 12 CSA elements in octahedral arrangement |
| 2-channel cardiac array | Home built | Rx | Surface coil with passive decoupling |
| 31P/7Li-1H coil | Home built | Tx/Rx | Surface-coil/CSA combination |
| 129Xe/1H surface coil | Bruker | Tx/Rx | Surface coil, id = 10 cm |
| 129Xe head coil | Home built | Tx/Rx | Cable coil (surface coil) |
| 129Xe lung coil | Home built | Tx/Rx | 2-channel surface coil |
| 3He lung coil | Home built | Tx/Rx | 2-channel surface coil |
| 129Xe/1H solenoidal coil | Home built | Tx/Rx | Solenoid, id = 3 cm |
Contact
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Physikalisch-Technische Bundesanstalt
Page created: 2007-04-26, last update: 2008-08-07, F. Wojcik
Page created: 2007-04-26, last update: 2008-08-07, F. Wojcik