Patent · US Expired

Direction-finding system for localization of reflection-causing nterfaces in the human body

US4805622A · kind A · utility

12Cited by

14References

10Claims

0Family size

Inventors

Rainer Riedlinger · Karlsruhe, DE
Friedrich Ueberle · Gilching, DE

Key dates

Filing date	Mar 13, 1987
Grant date	Feb 21, 1989
Priority date	—
Expiry date	Mar 13, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S977/929
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A direction-finding system for localization of reflection-causing interfaces in the human body, in particular those of concretions, consists of at least one transmitter (18) emitting pulsed ultrasound and at least two ultrasound receivers (2, 3), of gate circuits (25) associated with each receiver, with variable amplifiers (26), and respective storage media (6) for ultrasonic echo signals (22, 21), and of a following device for sweep magnification (7) consisting of signal memories for readout at an adjustable clock frequency, there being provided variations of the delay differences ML and of the amplitude frequency spectra MF adjustable independently of each other. Connected downstream are devices for auditory direction finding (8, 9, 10, 15).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.