Ultrasonic imaging apparatus

摘要

An ultrasonic imaging apparatus is disclosed having a display selectably interchangeable between a shades of gray image presentation and an edge enhanced image presentation to facilitate distance measurements of the image on the display screen. A first filter network processes echo responsive electrical signals for preserving echo amplitude information in a shades of gray image presentation and a second filter network processes the echo responsive electric signals for enhancing only the leading edge of the electrical signals.