1998 年 11 巻 3 号 p. 126-128
The history of ultrasound diagnostic equipment began with the A-mode machine. Nowadays, not only pulsed Doppler, but also color flow mapping can be done on a real time B-mode machine. The circuit of the ultrasound transmitter/receiver, the so-called beam former, will soon be digitized, and this will markedly improve its performance.
The diagnostic ability of ultrasound equipment will be expanded to a wide range of applications, such as 3D display, clinical visualization of ultrasound contrast media, etc..