Organically responsive scrolling in ultrasonic diagnostic equipment

US5375599A · kind A · utility

Assignee

• Shimadzu Corporation · JP

Inventor

• Yutaka Shimizu · Fujisawa, JP

Key dates

• Filing date: Apr 26, 1993
• Grant date: Dec 27, 1994
• Expiry date: Apr 26, 2013

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S15/899
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Ultrasonic diagnostic equipment in which a probe beams ultrasonic waves into a living body under examination and detects reflected ultrasonic signals echoed or scattered therefrom. Data obtained from detected signals reflected from sounding lines of the ultrasonic emission are processed by a transmit and receive circuit or a Doppler detector to produce imaging data for M-mode display (corresponding to one radial or other line of a B-scan sweep) or for Doppler-mode display, on a video display monitor. The imaging data are written into a line memory driven by a 3 KHz clocking signal. In turn, the cycles of imaging data from the line memory are overwritten into a display memory via a clocking signal at a frequency selected by a display scrolling speed controller. The display scrolling speed controller, given an operator-selected display heartbeat number indicating how many heart beats is to be displayed per frame on the monitor, varies the speed at which recorded organic data are scrolled on screen according to the rate of periodicity of an organic function, e.g. of the heart, as measured by a measurement means. Scrolling-on of data in display is thus at a speed varying in synchroniza…