Shares of Peabody’s Analogic Inc. jumped after the medical imaging and security equipment company posted strong fourth-quarter results. Analogic said net income more than doubled to 96 cents per share, easily beating estimates. Analysts had expected 74 cents. The company said sales of medical imaging products held steady and revenue from ultrasound and security products improved. Analogic tied the gains to new products, a larger direct-sales force, and better efficiency. Revenue grew 9 percent in fiscal 2012.