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Digital all purpose LFOV gamma camera

for all conventional imaging

  • wide range of collimators
  • easy and fast patient set up
  • integrated ECG triggering device
  • tri-directional, silent, motorised stand and detector motion
    • comfortable imaging for all planar examinations
  • telemaintanance via internet for servicing and upgrading
  • FOV: 380 mm
  • Energy range: 40-400 keV
  • Intrinsic energy resolution for 99mTc: 10.2%
  • Intrinsic Spatial Resolution UFOV (FWHM): 4.1mm
Detectors
High stability detectors assembled with high optical and mechanical quality
  • NaI(Tl) scintillation crystal with special assembling case
    • Diameter: 413 mm
    • Thickness: 9.5 mm
  • Photomultipliers:
    • 37 pcs of high quantum efficiency PMTs/detector characterized by improved energy resolution, magnetic shielding and long-term stability
  • Lead shielding thickness: 16 mm - 32 mm

Detector electronics

Compact, highly integrated, one-board easily serviceable construction without tuning potentiometers:

  • computer controlled PMT autotuning processor for fast PMT gain stabilization and adjustment
  • computer controlled ODC electronics
  • high precision summation electronics
  • active high voltage bleeder with integrated HV module

Picker licenced DC4 stand

  • tri-directional, silent, motorized detector motion
  • hand-controlled positioning
  • electromagnetic brakes

Imaging table

  • Lightweight imaging table
  • Plexi glass table top (attenuation <5%)
  • Wheel-brakes for safe table stabilization

Collimators

  • LEGP collimator and cart
  • LEHR collimator and cart
  • MEGP collimator and cart
  • HEGP collimator and cart
  • HEPH collimator and cart

Optional accessories

  • Acquisition Console
  • ECG triggering device for cardiac gated studies
  • MODEM long-distance service kit (hardware and software)
  • Colour video imager or colour laser printer
  • CODONICS dry film changer
  • Tuning and test phantoms
  • Refillable isotope pen for anatomical marking
  • UPS
Technical Specifications

Measured per NU-1, 1994 using Tc-99m where applicable.
Performance characteristic  
Type AP AP/U Units
UFOV (Useful Field of View) 380 380 mm
Intrinsic energy resolution UFOV FWHM 10.2 10.9 %
Intrinsic spatial resolution CFOV FWHM 4.0 4.5 mm
    FWTM 8.0 8.8 mm
  UFOV FWHM 4.1 4.6 mm
    FWTM 8.2 9.0 mm
Intrinsic flood field uniformity CFOV differential 1.9 2.4 %
    Integral 2.4 2.9 %
  UFOV differential 2.4 2.9 %
    Integral 2.9 3.4 %
Intrinsic spatial linearity CFOV differential 0.18 0.20 mm
    absolute 0.38 0.40 mm
  UFOV differential 0.20 0.22 mm
    absolute 0.40 0.42 mm
Intrinsic count rate performance without scatter maximum   220 200 kcps
at 20% loss   160 150 kcps
System spatial resolution with LEGP/LEHR collimator FWHM 9.0 / 7.4 9.2 / 7.6 mm
FWTM 17.2 / 14.4 17.5 / 14.9 mm
Maximal matrix size

1024 x 1024

 
Collimator changing time

< 1.5

min
Camera weight with table

1000

kg
Minimal room size

12 (3 x 4)

m2
Uptime warranty

98

%
Acquisition Workstation and Gamma Camera Electronics
Full-digital electronics assembled from the latest "high-tech" elements including fast PCI bus acquisition interface.

Specification of the acquisition workstation:

  • Intel Pentium 4, 3 GHz computer with 64 bit memory handling
    • 512 Mbytes memory
    • 512 kbytes L2 cache memory
    • 160 Gbytes hard disk drive
    • CD-RW drive
    • 1.44 Mbytes floppy drive
    • 17" high resolution TFT colour monitor
    • shipped with Windows XP Prof. operating system
  • 40 MHz X,Y,Z A/D conversion
  • 4 independent energy channels
  • multi-channel analyser up to 1024 channels (40 - 600 keV)
  • 4096 x 4096 pixel image digitizing
  • digital corrections:
    • direct addressing TS® simulation linearity correction with FOV increasing technology
    • energy correction
    • uniformity correction without count rate loss
    • three-phase pile-up recovery and resolution enhancing technology for high count rates
Typical Room Layout

Layout Only - Not For Construction. Click on the image to enlarge it.

Harpell Associates Inc.,
1272 Speers Road, Unit 2, Oakville, Ontario, Canada, L6L 2X4
Phone (905) 825-2588, Fax (905) 825-0234, Toll Free: 1-800-387-7168
Email:  Info@Harpell.ca