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The PaxScan® 4343CB is specifically designed to meet the needs of Cone Beam X-ray imaging applications featuring
multiple sensitivity ranges and extended dynamic range
modes. The main system components are the 43 x 43cm
139μm-pixel amorphous silicon FPD and Command
Processor 2LC. Excellent low-dose performance is
achieved by combining Varian’s proprietary readout electronics
with the high sensitivity of a custom Cesium Iodide
scintillator. A Windows® based application program and a
communications command (DLL) library has also been
developed to assist OEM customers tasked with developing
their own system interface. This imager is intended for
incorporation into a complete X-ray system by a qualified
equipment manufacturer.
Product Description
Receptor Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Amorphous Silicon
Conversion Screen . . . . . . . . . . . . . . . . . . . . . . Integral columnar Csl:Tl
Pixel Area - Total . . . . . . . . . . . 42.7 cm (h) x 42.7 cm (v) (16.8 x 16.8 in)
Pixel Matrix - Total . . . . . . . . . . . . . . . . . . . . . . . . . . 3072 (h) x 3072 (v)
Pixel Pitch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139 μm
Limiting Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.6 lp/mm (1x1)
1.8 lp/mm (2x2)
MTF, X-Ray . . . . . . . . . . . . . . . . . . . . 50% (1.0 lp/mm at 80 kVp, 1x1)
DQE (0), Quantum-Limited . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 ±5%
Energy Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40 - 150 kVp
Fill Factor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60.7%
Dynamic Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 dB std modes
98 dB DGS modes
Contrast Ratio . . . . . . . . . . . . . . . . . . . . . . Large Area (120 mm):< 0.8%
Small Area (10 mm): < 7%
Lag . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <5% (first frame)
Scan Method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Progressive
Data Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LVDS, CameraLink
A/D Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-bits
Dual/Dynamic Gain Modes, Effective bits . . . . . . . . . . . . . . . . >16-bits
Non-Uniformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1% maximum
Inactive Lines . . . . . . . . . . . . . . . . . . . . . . . . < 9 total rows and columns,
minimum separation 16 lines
Inactive Pixels . . . . . . . . . . No inactive visible pixels after interpolation
Maximum Entrance Dose/Frame Gain-1 . . . . . . . . . . . . . . . 40 uGy
Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Passive convection
Radiation Tolerance . . . . . . . . . . . . . . . . . . . . . . . . . 2000 Gy (active area)
Mechanical
Weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 kg
Housing Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Aluminum
Mounting Provisions . . . . Blind, threaded mounting holes front and back.
Environmental
Temperature Limit . . . . . . . . . . . . . . . . . . . . . . . 10-35°C case temperature
Relative Humidity . . . . . . . . . . . . . . . . . . . . . . . 10-90% Non-Condensing
Atmospheric Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 kpa - 106 kpa
Shock Tolerance . . . . . . . . . . . . . . . 20G (any direction no power applied)
Image Acquisition Modes (Current)
Fluoro FOV: 1024 (h) x 1024 (v)
25 fps
3 x 3 binning, FOV 427 x 427 mm
Fluoro Zoom: 1024 (h) x 1024 (v)
30 fps
2 x 2 binning, FOV 285 x 285 mm
RAD: 3072 (h) x 3072 (v)
4 fps
1 x 1 binning, FOV 427 x 427 mm
CBCT: 768 (h) x 768 (v)
60 fps
4 x 4 binning, FOV 427 x 427 mm
Additional Modes: Consult Varian Medical Systems, Inc.
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