OEC 9900 (Technical Specifications)

Siemens ESSENZA 1.5 Tesla Magnet

  • Configuration: Superconductive, short bore
  • Strength: 1.5 T
  • Homogeneity, ppm V-RMS: 7.5 (typical 6 ppm) ppm @ 45 x 45 x 30 cm DSV, 2.2 (typical 1.9) ppm @ 40 x 40 x 30 cm DSV, V-RMS (based on 24-plane plot)
  • Dimensions of maximum useful FOV and homogeneity, (x, y, z): 45 x 45 x 30 cm
  • Frequency drift, ppm/day:
  • Shielding: Active, EIS (external interference shielding)
  • Main magnet shimming: Active, passive
  • Patient specific shimming: 3 linear terms (Standard) and second-order shim (Standard)
  • Cryogen refill frequency: Refill typical 10 years; zero Helium boil-off technology

 

ESSENZA Gantry

  • Bore diameter/height of patient opening: 60 cm
  • Overall bore length: 145 cm, cover to cover
  • Bore length with minimum opening: 103 cm
  • In-bore patient comfort features: In-bore lighting (3 levels), in-bore ventilation (3 levels), in-bore intercom, look-out mirror, patient supervision monitor

RF / Gradient System

  • Standard name: V engine
  • Standard strength, z-axis, mT/m: 30 true each axis value; 52 vector summation
  • Standard slew rate, z-axis, T/m/s: 100 true each axis value; 173 vector summation
  • Cooling type: Water cooled for highest duty cycle
  • Amplifier max power/axis, kW: 500 V engine
  • Amplifier cooling type: Standard cooling, optional chiller

DICOM

  • Modality worklist SCU: Standard
  • MR Image Storage SCU: Standard
  • Query/Retrieve SCU and SCP: Standard
  • Storage commitment SCU: Standard
  • Modality performed procedure step SCU: Standard
  • IHE profiles supported: Standard

OEC 9900 Features

  • Powerful V-engine gradients (30mT/m)
  • State-of-the-art zero helium boil-off magnet
  • Parallel Imaging in all directions and head to toe
  • Reduce acquisition times with PAT factors up to 8
  • Water-cooled gradient system with 24mT/m and 55T/m/s slew rate

ESSENZA Planning and Installation

  • Overall gantry dimensions (including covers), W x H x L: 2.11 x 1.31 x 2.14 meters (includes patient table)
  • Minimum ceiling height: 2.4 m
  • Extent of fringe field (0.5 mT, 5 gauss) in x, y, z directions: 2.5 m (x, y), 4 m (z)
  • Total weight w/cooling, shielding, gradient/body coil: 4,350 kg (9,570 lb)
  • Minimum dimensions of opening required for installation, W x H: 2.26 x 1.83 m
  • Minimum installation area for magnet:
  • Minimum total installation area for system:
  • Total number of cabinets required: 2, can be placed against the wall or in corner

Power Consumption

  • Line Voltage, VAC: 380, 400, 420, 440, 460, 480 V
  • Kva: 45
  • Clinical Use: Whole body

Image processor

  • Clock speed, GHz: 2
  • Operating system: Windows
  • Dedicated RAM: 4 GB, 144 GB dedicated raw data capacity

Image Reconstruction

  • Maximum number of 256 x 256 slices per acquisition sequence: 110,000 images at 512 x 512, uncompressed
  • Number of slices per sec (256 matrix): =2773 recons/sec (256 x 256 FFT, 25% recFOV); =983 recons/sec (256 x 256 FFT, full FOV); simultaneous scan and reconstruction =8 data sets
  • Maximum matrix: 1024 x 1024
  • Minimum slice thickness 2-D/3-D: 0.1/0.05 mm
  • Minimum FOV: 0.5 cm
  • Maximum FOV: 45 cm, 30-35 cm typical in z

Quantitative image analysis tools

  • Perfusion imaging: Standard calculation time-to-peak maps; optional inline perfusion (GBP, PBP, TTP)
  • fMRI: FuncTool standard; standard calculation time-to-peak maps; optional inline perfusion (GBP, PBP, TTP)
  • Diffusion imaging: StandardADC map calculation; optional inline diffusion (real-time calculation trace and ADC maps)
  • Diffusion tensor imaging: Standard MDDW, 6 and 12 directions; optional DTI sequence up to 256 directions
  • Cardiac imaging: Standard with cardiac suite
  • Cine: Standard
  • Coronary artery: Optional
  • Body imaging: Standard 1-D, 2-D PACE, dynamic analysis package includes addition, subtraction, division, multiplication, ADC maps, T1, T2, z-score, TTP, standard deviation
  • 3-D image reconstruction: Standard MIP, targeted MIP, MPR (including curved reconstructions), surface shaded display, MinIP; optional image fusion, vessel view, 3-D VRT, fly through

Acoustic Noise

  • Sound pressure level (SPL) at peak gradient amplitude and slew rate, dB(A): 93 V engine
  • Reduction technology: Antivibration mounting, noise reduction, systems integration, whisper mode, others

ESSENZA Scanning Techniques

  • Echo Planar Imaging: Yes, standard
  • Single shot: Standard; SE, FID
  • Multi shot: 2-D/3-D segmented; SE and FID
  • EPI pulse sequences: Standard
  • Maximum EPI factor: 256
  • Neurologic imaging: Standard
  • Perfusion: Standard
  • Diffusion weighted imaging: Standard
  • Functional MRI: StandardBOLD sequence; optional inline BOLD sequence, 3-D PACE
  • Spectroscopy (nuclei of interest): Optional single voxel spectroscopy, CSI for hydrogen nuclei (STEAM, spin echo techniques)
  • MRA: Standard
  • Time of flight: Standard 2-D/3-D TOF, ceMRA
  • Peripheral: Standard ceMRA protocols
  • Bolus tracking: Standard bolus tracking protocols, Care Bolus
  • Interventional MR: Optional
  • Ecg gating: CG triggering
  • Motion compensation: Yes
  • Prospective respiratory gating: Standard 2-D PACE
  • Maximum number of dimensions: Up to 6
  • Additional (Alarms, high/low): Third-party compatible coils, CP head array

Siemens ESSENZA Coils

  • Integrated body: Standard
  • Type: Array, receive only, PA (peripheral angio) matrix
  • Number of independent channels: 30-60 x 27
  • Head: Standard
  • Diameter, cm: Array, receive only, double loop
  • Number of elements: Varied, can be combined with matrix coils
  • Number of independent channels: 8
  • Parallel imaging compatible: Yes, in combination with other coils
  • Mirrors for patient head: Yes
  • Tmj: Optional
  • Number of element: Varied, can be combined with matrix coils
  • Neck: Standard
  • Coverage (head to foot): 19 cm
  • Cardiac/abdomen: Standard
  • CTL spine: Standard
  • Dimensions, L x W, cm: 32 x 30 cm
  • Coverage (head to foot), cm: Full fov
  • Number of elements: Varied, can be combined with matrix coils
  • Flexible: Yes
  • Number of elements: varied, can be combined with matrix coils
  • Shoulder: Optional
  • Breast: Optional
  • Bilateral: Yes
  • Biopsy access: Yes
  • Dimensions, L x W: 18 x 16.8 x 18.6 cm (H), small; 18 x 16.8 x 18.6 cm (H), large
  • Circular general-purpose: Optional
  • Whole abdomen: Optional
  • Extremity: Lower: Optional; Upper: Standard
  • Dimensions, L x W: 30 x 30 cm
  • Number of elements: Varied, can be combined with matrix coils
  • Endocavity: Optional
  • Diameter: 17 x 36 cm, small; 21 x 52 cm, large: 27 x 29 cm
  • Length: 40.5 cm
  • Length: 17 x 36 cm, small; 21 x 52 cm, large
  • Number of independent channels: 30-60 x 27
  • Peripheral vascular: Optional
  • Diameter: 30-60 cm x 27 cm
  • Length: 97 cm
  • Number of elements: 16
  • Diameters available: 4 cm, 19 cm
  • Dedicated parallel imaging: All coils iPAT compatible; dedicated coils not necessary
  • Combined: All coils can be simultaneously combined
  • Power output, kW: 15
  • Amplifier type: Solid-state
  • Standard number of channels: 8
  • Receiver bandwidth, kHz: 1,000 per channel
  • Location of coil connector (plug): Patient table
  • Standard length of coil cables, m: Coil dependent
  • Number of coil connectors (plugs): 4
  • Coil tuning technique: Automatic

Parallel imaging

  • Name: iPAT
  • Technique: mSENSE and GRAPPA (image based and k-space based)
  • Calibration Technique: Automatic
  • Maximum parallel acquisition acceleration factor: Standard 4; optional 8, 12 with iPAT extensions

Sequence Selection

  • Spin echo (Minimum TR ms)
  • Minimum TR, 256 matrix, 30 cm FOV: 9.7 msec
  • Minimum TR, 256 matrix, 30 cm FOV: 1.46 msec, 2-D/3-D GRE
  • Minimum possible TE: 0.62 msec
  • Minimum possible TI: 23 msec
  • Fast-spin-echo max train length: 512
  • Echo planar imaging max train length: 256

Control Console Workflow

  • Standard user interface: syngo, multimodality user interface
  • Local hard disk capacity: 145 GB
  • RAM: 2 GB
  • Removable media: CD/DVD
  • Image protocol sharing: Phoenix: DICOM image-based method duplicates protocol via drag and drop
  • Features designed to enhance workflow: Autoalign, Phoenix, scan assistant, inline technology, syngo, iPAT(GRAPPA), Tim assistant, utilization management reports, structured reporting, others

ESSENZA Patient Table

  • Detachable: Optional
  • Dimensions, L x W: 243 x 54 cm
  • Horizontal speed: 20 cm/s
  • Elevating: Standard free-floating
  • Minimum height: 55 cm