At the heart of our lab is our state-of-the-art Bruker 7T MRI system with 40-cm diameter bore — the first such system installed in the United States — which is capable of supporting a range of small to large-animal studies.
Bringing this technology to the Stanford neuroscience community was made possible by funding from the National Institutes of Health (grant S10OD025176 to Jin Hyung Lee, PhD), and the Wu Tsai Neurosciences Institute. We would also like to acknowledge the long-time support of the Stanford departments of Neurology, Neurosurgery, Psychiatry and Radiology and Stanford BioX, which was critical in making our new facility a reality.
MRI Technical Specifications
Bruker 7T MRI: BioSpec 70/40 ASR
Zero helium boil-off technology, nitrogen-free actively shielded refrigerated (ASR) superconducting magnet, 8 receiver channels
Gradient system with amplifier upgrade (300A/500V output)
| Main Gradient: BGA26S | Gradient Insert: BGA12S HP |
|---|---|
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Actively shield gradient |
Actively shield gradient |
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Integrated shim (2nd order) |
Integrated shim (2nd order) |
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Inner diameter: 260 mm |
Inner diameter: 114 mm |
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Gradient strength: 230 mT/m |
Gradient strength: 660 mT/m |
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Max slew rate: 6500 T/m/s |
Max slew rate: 4580 T/m/s |
RF coil options
| Tx/Rx Volume coil | Rx-only Array coil | CryoProbe |
|---|---|---|
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1 outer/inner diameter: 255 mm/197 mm |
1 inner diameter: 120 mm, 8 x 1 coil elements |
2x2 coil elements array kit for mice |
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1 outer/inner diameter: 198 mm/154 mm |
Mouse brain, 2 x 2 coil elements |
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1 outer/inner diameter: 112 mm/86 mm |
Rat brain, 2 x 2 coil elements |
Using the cryoprobe RF coil at the Neuroscience Preclinical Imaging Laboratory, high resolution MR brain images can be acquired in 3D with 22um isotropic resolution. Here we can see exquisite details of hippocampus, cerebellum as well as olfactory bulb. The cryoprobe is ideal for high resolution ex-vivo as well as in-vivo mouse brain studies. It provides more than 2-fold theoretical increase in signal-noise ratio (SNR) by minimizing thermal noise. When we compared results using the cryoprobe with our best room-temperature RF coil, it provided a 3-fold increase in SNR.
Standard Vendor-provided MR Sequence Library
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Fast gradient echo (FLASH) |
Triggered acquisition
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Spin echo based echo planar imaging (EPI) |
Variable Repetition time fast spin echo (RAREVTR) |
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Multiple slice multiple echo (MSME) |
Spin echo based diffusion tensor imaging (DTI_STANDARD)
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Gradient echo based echo planar imaging (EPI)
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T1 echo planar imaging (T1_EPI) |
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Fast spin echo (RARE) |
Echo planar based diffusion tensor imaging (DTI_EPI)
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Flow-sensitive alternating inversion recovery (FAIR_RARE, FAIR_EPI)
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T2* echo planar imaging (T2S_EPI) |
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T1-weighted fast spin echo (MDEFT) |
Spiral based diffusion tensor imaging (DTI_SPIRAL)
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Fast spin echo imaging with very short echo times (RAREST)
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T2 echo planar imaging (T2_EPI) |
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Steady state free precision imaging (FISP) |
Flow-compensated fast gradient echo imaging (FcFLASH)
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Spiral imaging (SPIRAL)
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Spectroscopy imaging (CSI) |
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Non-localized pulse & acquire (SINGLEPULSE, NSPECT) |
Phase contrast angiography and quantitative mapping (FLOW_MAP)
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Ultra short echo time imaging (UTE, UTE3D)
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Echo planar spectroscopic imaging (EPSI) |
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Automatic B0 field map shimming |
Fast spin echo perfusion imaging (FAIR_RARE)
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Zero echo time 3D imaging (ZTE)
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Localized single voxel spectroscopic (PRESS, STEAM, ISIS) |
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Echo planar perfusion imaging (FAIR_EPI)
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Multi gradient echo imaging (MGE)
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High-resolution NMR pulse sequence library for spectroscopy |
