SALIENT CHARACTERISTICS- TOMOTHERAPY SYSTEM The tomotherapy system requires a detector, a phantom, and compatible software that meets or exceeds the following approximate specifications. a. DETECTOR Device type: Vented ionization chambers Detector design: cubic Number of detectors: 729 Detector size: 0.5 cm x 0.5 cm x 0.5 cm (0.125 cm³) Detector spacing: 10 mm center-to-center, 5 mm edge-to-edge Max. field size: 27 x 27 cm² Max. measurement points: 2916 (four measurements) Reproducibility: ?± 0.5% Dead time: zero Repetition rate: 200 ms Measured quantities: absorbed dose to water (Gy), absorbed dose rate to water (Gy/min) Resolution: 1 mGy or 1 mGy/min Measurement range: (0.5 ... 45) Gy/min Reference point: 7.5 mm below the surface of the array Housing material: GPR Dimensions: 30 cm x 42 cm x 2.2 cm (W x D x H) Weight: approx. 5.7 kg Power supply: (90 ... 265) VAC; (50 ... 60) Hz PC connection: RS232, Ethernet b. PHANTOM Design: Octagon-shaped solid body phantom with two exchangeable bottom parts (LINAC phantom with air cavity, CT phantom) Dimensions: diameter 32 cm, length 32 cm Weight: approx. 24 kg Material: Polystyrene (water equivalent within ~ 2%) Density: 1.04 g/cm3 Extent of supply: LINAC & CT phantom, positioning device, merge 729 insert c. SOFTWARE COMPATIBILITY: The included tomotherapy system software must be compatible with the following computer system specifications. Operating system: Microsoft® Windows® (XP Professional, Vista® Business x32/x64, Windows 7 Professional x32/x64) Processor: Multi-core processor Memory (RAM): 2 GB Hard disk: 500 MB of free space for application software 600 MB of free space for .NET Framework 4.0+ Screen resolution: 1280 x 1024 Interfaces: Network interface Other: Windows® Internet Explorer® 8.0 or higher, Adobe® Reader® 7.0 or higher

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