Cardiac, Mobile C-arm : The PaxScan® 2020X is a real-time digital X-ray imaging device commonly referred to as a flat panel detector (FPD). The main system components are the 20 x 20cm 194?m-pixel amorphous silicon FPD and Command Processor CP2LC. Excellent low-dose performance is achieved by combining Varian’s pro- prietary readout electronics with a custom Cesium Iodide scintillator. A Windows ® based application program and a communications command (DLL) library has also been developed to assist OEM cus- tomers tasked with developing their own system interface. This imager is intended for incorporation into a complete X-ray system by a qualified equip- ment manufacturer.