X-Ray diagnostic installation for providing subtraction images

Details X-Ray diagnostic installation for providing subtraction images X-Ray diagnostic installation for providing subtraction images

1982-09-22

1985-03-05

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

128653, 128654, 378 99, 364414, H04N 532

Patent

active

045034591

ABSTRACT:
An exemplary embodiment comprises an image intensifier television chain, a subtraction device which has at least one image memory and a difference stage for providing subtraction images through difference formation from the stored video signals and chronologically displaced video signals, and a monitor. There is series connected with the subtraction device a circuit with a high-pass filter characteristic for the purpose of two-dimensional spatial frequency filtering.

REFERENCES:
patent: 4204225 (1980-05-01), Mistretta
patent: 4204226 (1980-05-01), Mistretta
patent: 4272782 (1981-06-01), Proper et al.
patent: 4394684 (1983-07-01), Verhoeven
patent: 4398213 (1983-08-01), Haendle et al.
patent: 4425580 (1984-01-01), Haendle et al.

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