The TheraView electronic portal imaging device (EPID) is an Image-Guided Radiotherapy (IGRT) cancer treatment verification system, designed by Cablon Medical in the Netherlands. The foundation of the TheraView Electronic Portal Imaging System is based on verification, accuracy and flexibility. By bringing radiotherapy images live and on-line, the TheraView EPID reportedly provides radiation oncologists and therapists with a more precise, effective alternative to time-consuming and inconvenient port film. The improved image quality of TheraView can greatly enhance treatment and patient positioning accuracy.