The Siemens Acuson Sequoia 512 is a popular mid-range cardiac and shared service ultrasound machine offering high end performance. It features a 14" CRT monitor, 3 probe ports, and imaging modes including B-Mode, M-Mode, Color Doppler, and PW Doppler. A variety of transducers are available including convex, linear, and endocavitary probes ranging from 1-17 MHz.