Perform true spatial alignment and coincidence tests on IGRT systems The QUASAR™ Penta-Guide Phantom contains lowdensity rings and hollow spheres designed to minimize imaging artifacts. These unique visualization features provide quick confirmation of the phantom set-up before investing time in the QA procedure. They also serve to ensure isocenter alignment in accordance with accepted radiotherapy tolerances using 2D/2D and 3D/3D match. Enables daily testing to ensure on-board imaging targeting accuracy Contains low-density rings and hollow spheres to minimize high-density artifacts Includes FREE image analysis software to simplify CBCT QA testing Apply simple Pass / Fail acceptance criteria Testing does not infringe upon patient treatment time Light field alignment 4x4; 10x10; 12x12 16 cm cube -5kg 1/4 mm accuracy Carried out by a therapist every morning, testing takes little or no extra time and can be completed during normal daily equipment warm-up procedures. The phantom ensures the accuracy of linac-mounted imageguidance systems, including cone beam CT (CBCT), x-ray volumetric imaging (XVI) and on-board imaging (OBI), by enabling daily testing for: 3D Cone Beam Registration and MV System Coincidence kV and MV Projection Images kV Laser and Light Field Coincidence Weekly Remote Table

Left: Example of translational misalignment Left: Phantom centered in field of view, spheres centered in rings *All images 6MV AP Right: Example of rotational misalignment PASS/FAIL CRITERIA For each test there are simple pass/fail criteria. A typical tolerance of +/- 2 mm in x, y, and z directions is recommended. Displacements can be tracked over time for trend analysis using the Excel spreadsheet provided with the Penta-Guide. Alternatively, shifts can be exported to the record and verify system. IMAGE QUALITY ANALYSIS SOFTWARE QUASAR™ Penta-Guide QA Software is a time-saving application designed...