Stand-Up MRI & Diagnostic Center, Inc.
Specifications | THE FONAR UPRIGHT® WEIGHT-BEARING MRI (also known as the Stand-Up® MRI) |
Unique Applications | Rotates patients from recumbent to upright |
Comparative scans in both Upright and Recumbent positions | |
Flexion, Extension, Standing, Sitting and Lateral Bending positions | |
Scans patients in their position of symptoms | |
Ideal for anxious and claustrophobic patients | |
The only choice for patients that cannot lie down | |
Magnet | |
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 | |
Positioning Capabilities | Translate, Elevate & Angulate |
Rotates patient from recumbent to upright | |
Patient Stabilization | Table tilts backward at 7 degrees to reduce patient motion |
Patient immobilization fixtures | |
VersaRest™ trans-polar stabilization bars | |
RF Receiver Coil Placement | RF coils mount easily to movable fixtures |
Patient Weight Limit | 500 lbs. |
Radiofrequency System | |
Transmitter Configuration | Dedicated, Circularly Polarized, Planar |
Receiver Configuration | Dual-channel |
RF RECEIVER COILS | |
Standard Package | |
Solenoid/Linear | High-Performance Spine & Body Wide Belts (45", 55", 65" |
Flexible Cervical | |
Signal-Plus Universal Coils | |
Solenoid Wrist | |
Advanced Coil Package | |
Planar | Quadrature Planar Coil and fixture |
[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 |
Quadrature T-L (Thoracic-Lumbar) Coil | |
Quadrature Knee Coil | |
Phased Array | Shoulder (with Immobilization Fixture) |
Computer System | |
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 |
Gradient System | |
Type | Bi-planar self-shielding |
Maximum Strength (mT/m) | 20 |
Slew Rate (T/m/s) | 33 |
Minimum Slice Thickness | 2.0 mm (2DFT) |
0.8 mm (3DFT) | |
Minimum Field-of-View | 6.0 cm |
Imaging Techniques | |
Pulse Sequences | Spin Echo (SE) |
Multi-echo spin echo (MSE) | |
Dual bandwidth Double-echo (DE) | |
Fast Spin Echo (FSE) | |
Inversion Recovery Spin Echo (IRSE) | |
Inversion Recovery FSE (IRFSE): STIR, FLAIR | |
Driven Equilibrium FSE (DEFSE) | |
Driven Equilibrium IRFSE (DEIRFSE) | |
Single-shot FSE (SSFSE) | |
Gradient Echo (GRE): | |
Fat/Water out-of-phase | |
Multi-echo GRE (Fat/Water in/out/in phase) | |
Gradient Spoiled GRE | |
Steady-State GRE: | |
RF Spoiled GRE, Steady-State Rephased GRE | |
MR Angiography: | |
2D-TOF and 3-D-TOF | |
Ramped RF | |
Sequence Controls | |
Fast Spin Echo | Driven Equilibrium |
Echo Train Length, Echo Offset, Echo Spacing | |
Gradient Echo | Flip Angle |
Steady-State, RF Spoiling, Rephased | |
Magnetization transfer (MT) | |
Direction of flow saturation | |
Scan orientations | Multi-Angle Oblique (MAO™), Dual-Axis Oblique |
Preparation Pulses | Presaturation pulses |
Magnetization transfer (MT) | |
Frequency Selective Saturation (e.g. fat, water, silicone) | |
Diffusion-Weighted (DWI) | |
Trigger/Timing | Test Bolus |
Breathhold, Fluorscopic | |
Reconstruction | Fast Fourier Transform (DFT): 2DFT, 3DFT |
Partial (Half) Fourier | |
ZIP interpolation | |
2-point Dixon, 3-point Dixon for Fat Suppression | |
Firing Order | Cross-talk minimization |
Interleaved | |
Interleaved by Subscan (e.g. breathhold) | |
Sequential | |
Data Acquisition | Rectangular FOV (continuously variable phase sampling ratio) |
Multiple Sub-Scanning | |
Centric Phase Encoding | |
Flow Compensation, Ramped RF | |
Low Bandwidth, Multi-bandwidth | |
Continuously Variable Display Matrix | |
Swap Frequency and Phase | |
Repeat and Replace Slices | |
Continuous Scan Mode, Breath-hold Imaging, Kinematic Mode | |
Prescan Indicators | Relative resolution |
Absolute resolution (frequency and phase) | |
Post-Processing | MIP with rotate, tumble, pan |
Image enhancement | |
Bright Balance™ | |
Display and Analysis | Windowing, ROI, zoom, pan |
Cursors, profiles, derivatives, mean, standard deviation | |
Image subtraction | |
SNR measurements | |
Image Viewing Software (IVS) for referring physiciand to view their patients' scans on a CD |