Patent · US Expired

X-Ray diagnostic installation for providing subtraction images

US4398213A · kind A · utility

13Cited by

5References

9Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Joerg Haendle · Erlangen, DE
Wolfgang Maass · Nuremberg, DE
Hans-Dieter Wolf · Erlangen, DE

Key dates

Filing date	Apr 9, 1981
Grant date	Aug 9, 1983
Priority date	—
Expiry date	Apr 9, 2001

Classification

Technology area (CPC H)Electricity
CPC primaryH04N5/3205
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

In an exemplary embodiment, video images from a television pickup device corresponding to the x-ray images are supplied to an image store and to a difference stage for the purpose of providing subtraction images through difference formation from the stored and the current video signal. The difference stage is connected with a first adder which in turn is connected with a second image store, whose output signal is supplied to a first adder, so that the image point data of the difference stage are summed in the second image store. The output signal of the second image store is supplied to the monitor.

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