Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1984-06-01
1985-12-17
Church, Craig E.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
378 99, 364414, 364415, 358166, G06F 1542, H04N 532
Patent
active
045595577
ABSTRACT:
In digital subtraction angiography a low X-ray energy temporal subtraction image is displayed on a video monitor. Regions in the temporal image frame that contain motion artifacts are outlined by using a cursor. The coordinates of the pixels in the defined outlined region are stored in a processor memory. The data for a related hybrid subtraction image are developed and stored. The processor then effects substitution of the hybrid subtraction image pixels, that fall within the same defined region, into the temporal subtraction image. The combined image data are transferred to a display controller memory which controls display of the combined image on a monitor. A method and means are provided for automatically determining the optimum value of the weighting coefficient applied to the high energy temporal subtraction image that results in the most complete cancellation of everything in the two images except the contrast medium filled blood vessel when the high and low energy temporal images are subtracted. A method and means are provided for altering the gain and offset of the hybrid image data in such manner as to match the hybrid image contrast and brightness with that of the temporal subtraction image.
REFERENCES:
patent: 3706851 (1972-12-01), Froehlich et al.
patent: 4245244 (1981-01-01), Lijewski et al.
patent: 4335427 (1982-06-01), Hunt et al.
patent: 4361901 (1982-11-01), Daniels et al.
patent: 4367490 (1983-01-01), Riederer
patent: 4445226 (1984-04-01), Brody
patent: 4449195 (1984-05-01), Andrews et al.
patent: 4454507 (1984-07-01), Srinvasan et al.
patent: 4482918 (1984-11-01), Keyes et al.
Belanger Barry F.
Hall Anne L.
Keyes Gary S.
Church Craig E.
General Electric Company
Wieland Charles F.
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