Diagnostic X-ray apparatus

Details Diagnostic X-ray apparatus Diagnostic X-ray apparatus

1983-06-10

1985-10-01

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

378 99, 364414, H04N 532

Patent

active

045449481

ABSTRACT:
A diagnostic X-ray apparatus emitting pulsed X-ray radiation and including a processor for performing digital X-ray subtraction imaging which includes digitization of the video signals from an image intensifier-TV chain, digital subtraction and reconversion of the resultant digital difference video signals to analog signals, wherein the subtraction is performed for two successive difference images with multiplying each image by the respective weighting factor in a predetermined image sequence. The resulting difference image is compared with a standard and reduced to at least the standard before display.

REFERENCES:
patent: 4178510 (1979-12-01), Wagner
patent: 4204225 (1980-05-01), Mistretta
patent: 4204226 (1980-05-01), Mistretta
patent: 4272820 (1981-06-01), Lux
patent: 4444196 (1984-04-01), Stein
patent: 4449195 (1984-05-01), Andrews et al.
patent: 4463375 (1984-07-01), Macorski
patent: 4504908 (1985-03-01), Riederer et al.
"Latest Diagnostic System for Circulatory Organs", Nakashika et al., Toshiba Review, Int. Ed., Jul.-Aug. 69, No. 43, pp. 24-29.
"Clinical Experiences of Digital Subtraction Angiography using Digiformer II--A Prelim. Report--Takamiya et al., Toshiba Med. Review, Jan. 82, vol. 7, pp. 45-52.

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