Diagnostic radiology system for angiographic x-ray examinations

Details Diagnostic radiology system for angiographic x-ray examinations Diagnostic radiology system for angiographic x-ray examinations

1982-09-28

1985-04-30

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

128654, H04N 532, A61B 600

Patent

active

045147590

ABSTRACT:
An exemplary embodiment comprises an image intensifier television chain and an image subtraction device, connected thereto, with three image memories. In two image memories, a blank image is stored, respectively, whereby the first blank image is automatically stored long before commencement of the rise of the contrast medium concentration. Through observation of the difference image in a fluoroscopy operation with a low dose rate, the time of the rise of the contrast medium concentration can be precisely located. Then a radiographic recording series follows with a high dose rate per image. This radiographic series may be retained in an on-line operation using a hard copy-series device. No subsequent off-line-operation is necessary.

REFERENCES:
patent: 4204226 (1980-05-01), Mistretta et al.
patent: 4444196 (1984-04-01), Stein
patent: 4450478 (1984-05-01), Ledley

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