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• Daily check device including 10 air-vented ion chambers
• Automatic atmospheric beam corrections
• User - friendly interface
• Thorough data analysis
• (Optional) wireless state-of-the-art communications
• Limitless data storage
Features
• Windows CE
• Removable flash memory
• User created protocols
• Tabular or graphical data presentation
• Ethernet, USB (standard)
• Large, bright, easy-to-use color touch screen
The Double Check® Pro is a portable, easy-to-use, daily check device for therapy beam quality assurance. Ten ion chambers are positioned to simultaneously check beam constancy, symmetry, flatness, and energy constancy. Nine ion chambers are used for verification of flatness, symmetry, and dose constancy while a special filtered ion chamber provides energy constancy information. The bright color LCD touch screen display and user interface, make the unit easy to use. Internal and external Flash memory along with several different computer interfaces allow flexible measurement storage, comparison and archival record keeping.
The Double Check® Pro consists of a detector array and software for performing linear accelerator quality assurance using air ion chamber technology for dose measurement, avoiding the radiation damage issues of diode detectors.
Windows® CE based software acquires beam profile data from the detector array. The beam profile is displayed numerically or graphically. Beam profile analysis such as flatness and symmetry is performed and is saved in a database resident on the unit, facilitating daily, weekly, yearly checks, aiding in following the guidelines in TG-40. The data is also available for correlation to TG-51 data.
Specifications
Display
Dot Pixels: 320 x 3 [RGB] (w) x 240
Viewing Area: 122.0 (w) x 92.0 mm (h)
LCD Type: F-STN/color-mode/transmissive
Backlight: Cold cathode fluorescent lamp
Detector
Material: Acrylic
Standard Field Size: 20 x 20 cm or 10 x 10 cm
External Chamber Cavity: Side cavity provided for farmer-type ion chamber (0.6 cc), allowing central axis calibration
Ion Chamber Build-up (all chambers): 5 mm acrylic, 0.375 g/cm2; 0.8 mm polyethylene, 0.146 g/cm2
Ion Chambers: Ten air vented
Ion Chamber Configuration: One central axis; four - 4 cm off-axis; four - 8 cm off-axis; energy constancy chamber for external filters @ 9 cm off-axis.
Ion Chamber Nominal Bias Voltage: 300 VDC
Ion Chamber Diameter/Volume: 1.27 cm/0.65 cc
System
Dose Range: 50 to 1000 rad/min; 0.50 Gy to 10 Gy/min
Beam Type Energy: Photons: 2 to 25 MV
Beam Type Energy: Electrons: 2 to 25 MeV
Operating Temperature: Minimum 10°C, maximum 40° C
Dimensions: 9” W x 18.9” D x 2.3” H
Weight: 6.34 lbs.
System Components:
Double Check® Pro
6 ft USB Cable
Stainless Steel Filter Set: 0.46, 0.61, 0.76, 0.91, 1.5, 1.9, 3.0, 3.6, 5.0, 10, 15, 30 mm
Buildup Plates: 3 - 1 cm plates
Universal 6VDC AC Adapter
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