Real-time digital X-ray time interval difference imaging

Details Real-time digital X-ray time interval difference imaging Real-time digital X-ray time interval difference imaging

1978-05-16

1980-05-20

Griffin, Robert L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

250416TV, H04N 532

Patent

active

042042267

ABSTRACT:
Difference images, derived from an X-ray image of an anatomical subject, are produced in real time by directing X-rays through an anatomical subject to produce an X-ray image, converting the X-ray image into a series of television fields comprising trains of analog video signals, converting the analog video signals into corresponding digital video signals, integrating the digital video signals over a series of successive time intervals corresponding with a plurality of television fields and thereby producing a series of sets of integrated digital video signals, performing a series of subtractions between each set of integrated video signals and the preceding set of integrated video signals and thereby producing a series of successive digital difference video signals, converting the digital difference video signals into analog difference video signals, and converting the analog difference video signals into a series of visible television difference images representing changes in the X-ray image between the successive time intervals. Apparatus for carrying out this method is also disclosed.

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Brennecke et al., A Digital System for Roentgen-Video Image Processing edited by Heintzen and Bursch, George Theime Pub., Stuttgart, 1978, Roentgen-Video Techniques for Dynamic Studies of Structure and Function of the _Heart and Circulation, 2nd Int. Workshop Conf., Apr. 1976, pp. 151-157.
Baily et al., Capabilities of a Single Scan TV Radiographic System for Digital Data Acquisition, Investigative Radiology, Jul.-Aug. 1971, pp. 273-279.
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Robb et al., 3 Dimensional Reconst. and Display of the Heart, Lungs and Circulation by Multiplanar X-ray Scanning Video Densitometry-Cardiovascular Imaging and Image Processing, SPIE Publication edited by Harrison et al., 1975, pp. 183-194.
Gilbert et al., A Real Time Hardware System for Digital Processing of Wideband Video Images, IEEE Trans. on Computers, vol. C25, #11, Nov. 1976, pp. 1087-1100.

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