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| Victoreen Double Check Pro Daily Check Device. |
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IntroductionThe Victoreen® 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 the 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. Features |
Applications The Victoreen Double Check Pro consists of a detector array and software for performing linear accelerator quality assurance using physicist preferred 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 Dot size 0.10 (w) x 0.34mm (h) Dot pitch 0.12 (w) x 0.36 mm (h) 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 (0.6cc)), allowing central axis calibration. Ion chamber buildup (all chambers) 5 mm acrylic, 0.375 g/cn²; 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 - Electrons 2 to 25 MeV Operating temperature Minimum 10ºC, maximum 40ºC Dimensions 9 (w) x 18.9 (d) x 2.3 (h) in (23 x 47.9 x 5.8 cm) Weight 6.34 lb. (2.88 kg) System Components (model 7600) - 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, 1 cm, 3 each |
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