Ultrasound diagnostics system for obtaining a tomographic image

摘要

A plurality of groups of delay time data corresponding to a plurality of focal distances Fn satisfying a condition that a ratio (Fi-Fi-1 )/(Fi-1-Fi-2) is equal to a constant value higher than one are stored in a focus memory. Therefore, the groups of delay time data corresponding to short focal distances are densely stored. When a particular focal distance is specified, a plurality of ultrasonic pulses delayed according to a particular group of delay time data corresponding to the particular focal distance are transmitted from a plurality of micro-piezoelectric transducers to a focal point of an organism at the particular focal distance. Thereafter, a plurality of echo signals reflected at the focal point of the organism are received by the micro-piezoelectric transducers, and a piece of tomographic image data indicating a portion of a tomographic image is produced in a signal processing unit. Therefore, in cases where one or more particular focal distances are specified, pieces of tomographic image data indicating a tomographic image are produced according to one or more particular group of delay time data, and the tomographic image is displayed according to the tomographic image data.