QUASAR MRID3D WHITE PAPER: https://modusqa.com/wp-content/uploads/2020/02/MRID3D_WhitePaper-v3_PRINT.pdf Delivering accuracy... confidence to medical physicists since 2000 with over 5,200 QUASAR™ phantoms in more than 3,400 leading treatment centres worldwide. From QA phantoms and software for MRI, IGRT, Motion and IMRT to 3D dosimetry and optical CT scanners, Modus QA products are built to provide medical physicists with confidence that every patient is receiving the best possible treatment.