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US 4,398,213 AGranted
X-Ray diagnostic installation for providing subtraction images
AssigneeSiemens Aktiengesellschaft
InventorsJoerg Haendle, Wolfgang Maass, Hans-Dieter Wolf
Life of this patent
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AssigneeSiemens Aktiengesellschaft
InventorsJoerg Haendle, Wolfgang Maass, Hans-Dieter Wolf
Estimating the term…
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.
An x-ray diagnostic installation operable to produce video images for representing the results of an x-ray examination, and including a first image store, a difference stage connected with the output of the first image store for the purpose of providing subtraction images through difference formation, and a monitor, wherein the improvement comprises a second image store (15), a first adder (14) connected with the output of the difference stage (13), and connected with the second image store (15), so that, in the second image store (15), the image point data from the difference stage (13) for successive subtraction images are summed to provide a resultant image, the output of the second image store (15) being connected with said monitor (7) for display of such resultant image.
Dependencies are inferred from the claim text.