Specifications |
THE FONAR UPRIGHT® WEIGHT-BEARING MRI (also known as the Stand-Up® MRI) |
Unique Applications |
Rotates patients from recumbent to upright |
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Comparative scans in both Upright and Recumbent positions |
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Flexion, Extension, Standing, Sitting and Lateral Bending positions |
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Scans patients in their position of symptoms |
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Ideal for anxious and claustrophobic patients |
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The only choice for patients that cannot lie down |
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Magnet |
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Field Strength |
0.6 Tesla |
Magnet Type |
Iron-frame Electromagnet |
Cooling System Type |
Water (closed-loop); No Cryogens |
Field Orientation |
Horizontal, transverse to the patient |
Configuration |
Front-Open and Top-Open |
Patient Gap Dimensions |
18 inches (46cm) pole-to-pole |
Patient Comfort |
Upright/Sitting patient faces out and can watch a large flat-screen TV with an unobstructed view |
Patient Bed |
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Positioning Capabilities |
Translate, Elevate & Angulate |
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Rotates patient from recumbent to upright |
Patient Stabilization |
Table tilts backward at 7 degrees to reduce patient motion |
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Patient immobilization fixtures |
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VersaRest™ trans-polar stabilization bars |
RF Receiver Coil Placement |
RF coils mount easily to movable fixtures |
Patient Weight Limit |
500 lbs. |
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Radiofrequency System |
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Transmitter Configuration |
Dedicated, Circularly Polarized, Planar |
Receiver Configuration |
Dual-channel |
RF RECEIVER COILS |
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Standard Package |
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Solenoid/Linear |
High-Performance Spine & Body Wide Belts (45", 55", 65" |
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Flexible Cervical |
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Signal-Plus Universal Coils |
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Solenoid Wrist |
Advanced Coil Package |
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Planar |
Quadrature Planar Coil and fixture |
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[Note that the Upright MRI is dramatically different than an Open MRI as if utilizes planar (flat) coils to image the spine, just like a high-field MRI] |
Quadrature |
Quadrature Head Coil |
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Quadrature T-L (Thoracic-Lumbar) Coil |
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Quadrature Knee Coil |
Phased Array |
Shoulder (with Immobilization Fixture) |
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Computer System |
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Operating System |
Windows 2003 Server |
CPU |
Dual Intel Quad-Core processors |
Memory size, GB |
8.0 GB |
Online Storage |
Three 146 GB disk drives configured in a redundant RAID array with a storage capacity of 290GB |
Array processor |
Not required |
Reconstruction Speed |
< 0.1 sec per 256x256 image |
Storage media |
CD/DVD (5GB) |
Connectivity |
Dicom 3.0 including Store, Print, Query, Retrieve and Modality Worklist |
Console Configuration |
Dual-screen 1280x1024 19-inch LCD flat panel monitors with full screen dedicated to image review |
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Gradient System |
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Type |
Bi-planar self-shielding |
Maximum Strength (mT/m) |
20 |
Slew Rate (T/m/s) |
33 |
Minimum Slice Thickness |
2.0 mm (2DFT) |
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0.8 mm (3DFT) |
Minimum Field-of-View |
6.0 cm |
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Imaging Techniques |
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Pulse Sequences |
Spin Echo (SE) |
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Multi-echo spin echo (MSE) |
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Dual bandwidth Double-echo (DE) |
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Fast Spin Echo (FSE)
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Inversion Recovery Spin Echo (IRSE) |
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Inversion Recovery FSE (IRFSE): STIR, FLAIR |
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Driven Equilibrium FSE (DEFSE) |
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Driven Equilibrium IRFSE (DEIRFSE) |
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Single-shot FSE (SSFSE) |
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Gradient Echo (GRE): |
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Fat/Water out-of-phase |
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Multi-echo GRE (Fat/Water in/out/in phase) |
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Gradient Spoiled GRE |
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Steady-State GRE: |
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RF Spoiled GRE, Steady-State Rephased GRE |
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MR Angiography: |
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2D-TOF and 3-D-TOF |
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Ramped RF |
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Sequence Controls |
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Fast Spin Echo |
Driven Equilibrium |
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Echo Train Length, Echo Offset, Echo Spacing |
Gradient Echo |
Flip Angle |
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Steady-State, RF Spoiling, Rephased |
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Magnetization transfer (MT) |
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Direction of flow saturation |
Scan orientations |
Multi-Angle Oblique (MAO™), Dual-Axis Oblique |
Preparation Pulses |
Presaturation pulses |
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Magnetization transfer (MT) |
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Frequency Selective Saturation (e.g. fat, water, silicone) |
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Diffusion-Weighted (DWI) |
Trigger/Timing |
Test Bolus |
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Breathhold, Fluorscopic |
Reconstruction |
Fast Fourier Transform (DFT): 2DFT, 3DFT |
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Partial (Half) Fourier |
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ZIP interpolation |
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2-point Dixon, 3-point Dixon for Fat Suppression |
Firing Order |
Cross-talk minimization |
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Interleaved |
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Interleaved by Subscan (e.g. breathhold) |
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Sequential |
Data Acquisition |
Rectangular FOV (continuously variable phase sampling ratio) |
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Multiple Sub-Scanning |
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Centric Phase Encoding |
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Flow Compensation, Ramped RF |
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Low Bandwidth, Multi-bandwidth |
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Continuously Variable Display Matrix |
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Swap Frequency and Phase |
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Repeat and Replace Slices |
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Continuous Scan Mode, Breath-hold Imaging, Kinematic Mode |
Prescan Indicators |
Relative resolution |
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Absolute resolution (frequency and phase) |
Post-Processing |
MIP with rotate, tumble, pan |
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Image enhancement |
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Bright Balance™ |
Display and Analysis |
Windowing, ROI, zoom, pan |
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Cursors, profiles, derivatives, mean, standard deviation |
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Image subtraction |
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SNR measurements |
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Image Viewing Software (IVS) for referring physiciand to view their patients' scans on a CD |