• VERSATILE ROTATIONAL QA The ARC QA Phantom provides machine and patient QA for rotational treatment systems such as Varian RapidArc, Elekta VMAT,™ ™ and TomoTherapy® • ECONOMICAL, 2D ARRAY ALTERNATIVE The ARC QA Phantom is a 30 cm long x 20 cm diameter cylindrical phantom constructed of water equivalent Plastic Water™ DT material. Perform absolute and relative dosimetry with confidence using proven film and traditional ion chamber detectors... no software or Obtain absolute dose, relative dose, and point dose expensive detector equipment is required. Use familiar dosimetry QA measurements at isocenter and at exact techniques to perform rotational QA tests, including positions off isocenter, using standard ion chambers and evaluation of composite rotational dose distribution film. Chamber plug system accommodates a classic Farmer- from individual arcs, gantry alignment accuracy, and type chamber, which can be positioned anywhere within a rotational output rate uniformity. The ARC QA Phantom 13 cm diameter range on the axial face. Use the two included is not only useful for rotational QA, but for IMRT and film inserts, positioned in the axial or the longitudinal orientation, which can be rotated freely in 360°. • MACHINE QA CAPABILITIES Perform commissioning and test the capabilities of the treatment system with the included CT Volume Insert and Multiple Target Shapes and Densities QA Insert. By comparing known volumes and complex geometries between imager and treatment planning system(s), challenge and assess the TPS’ reconstruction abilities and determine the cumulative uncertainties. Evaluate the ability of the TPS to include and avoid critical structures and use the included film insert to verify expected dose delivery. Use the 3D Target Shape Insert’s multiple densities to check the CT density tables utilized by the components of the imaging and planning chain. ARC QA Phantom, partially disassembled, showing various inserts

Features Facilitates Accurate Positioning Quality, Modular Construction • Comprehensive laser alignment marks allow easy, repeatable positioning Constructed of Plastic Water material, water equivalent within 1% Digital Angle Gauge provides .1° precision for accurate placement and adjustments Inserts can be placed in the axial and/or longitudinal planes and positioned in four 90° increments within each cavity Positioning base provides consistent placement and easy handling with a gloss finish allowing the phantom to smoothly rotate in place Front and back sections of the phantom can rotate independently...