Apparatus for ultrasonic diagnosis with variable frame rate

摘要

An apparatus for ultrasonic diagnosis uses a probe to transmit ultrasonic waves to different focusing steps and to received reflected waves from target positions for diagnosis, controlled by a transmission- reception controller which also causes sectional images to be sequentially displayed in frames on a monitor. A frame rate calculator calculates from a frame rate for forming images at each of focusing steps at a specified depth. A frame rate comparator compares the frame rate calculated by the frame rate calculator with a specified threshold value determined by the timing of display by the monitor. A focusing controller thereby serves to adjust the number of focusing steps at the specified depth according to the result of comparison by the frame rate comparator such that an optimum number of focusing steps can be selected to obtain a dependably real-time clear images can be displayed.