TEST OBJECT FOR THE CORRECTION OF MOTION ARTEFACTS OF A PORTAL IMAGER EQUIPPING AN EXTERNAL RADIATION THERAPY TREATMENT DEVICE WHEN THE EXTERNAL RADIATION THERAPY TREATMENT DEVICE IS MOVING
Disclosed is a test object for an external radiation therapy treatment device, the treatment device including a rotating gantry carrying at one end a radiation head and, at the other end, a portal imager, the test object including a radiologically translucent plate within which at least one radiopaque member is embedded, the at least one radiopaque member forming a geometrical pattern having at least two points and the center of the geometrical pattern corresponding to the center of the radiologically translucent plate, and a fastening element to attach the test object on the radiation head.
