F31, a compact system with outstanding performance, is developed with the purpose of providing what is necessary for natural and comfortable examinations. Devised for user-friendliness, functions and features are collected to offer comfortable examinations to both examiner and patient. F31’s operation panel layout is enhanced for easier use. Frequently used switches are placed to fit the palm of your hand. Some of the powerful functions for reliable observation are the Advanced imaging functions, the Free Angular M-mode (FAM), the eFlow, Extended Field of View (EFV), High Frame Rate Zoom, the Dynamic Slow-motion Display (DSD), the Dual Dynamic Display (DDD), Auto Angle Correct, the 3D imaging, and it supports Brachytherapy.