Logos Systems creates proton and x-ray therapy QA solutions using novel scintillator cameras. The XRV-124 is a 4D phantom that captures entire treatment plans in real time, analyzing each beam vector and profile at 0.2 mm accuracy. The XRV-4000 measures beam position/profile on a 42 x 32 cm field; the LCW-200 wedge performs Bragg Peak measurements.