Patent · US Expired

Diagnostic x-ray installation for providing subtraction images

US4425580A · kind A · utility

10Cited by

5References

3Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Joerg Haendle · Erlangen, DE
Wolfgang Maass · Nuremberg, DE

Key dates

Filing date	Oct 26, 1981
Grant date	Jan 10, 1984
Priority date	—
Expiry date	Oct 26, 2001

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02A90/10
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An exemplary embodiment includes a television pickup installation, image storage circuitry, a difference stage for the subtraction of two chronologically successively obtained image data signals through difference formation and a monitor. An address computer is connected with the output of the difference stage and has outputs connected to the address inputs of the image storage circuitry. The computer alters in a step-wise fashion the allocation of the image point data to be compared in the difference stage (13) until a minimum of the difference formed during the subtraction of two images results.

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