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  • Title: A hybrid computerized fluoroscopy technique for noninvasive cardiovascular imaging.
    Author: Ergun DL, Mistretta CA, Kruger RA, Riederer SJ, Shaw CG, Carbone DP.
    Journal: Radiology; 1979 Sep; 132(3):739-42. PubMed ID: 472258.
    Abstract:
    The excellent linearity of digital image storage and retrieval permits hybrid analog-digital subtraction to extend the spatial resolution of two previously developed algorithms which employed entirely digital apparatus. A low resolution, time-integrated preinjection digital mask image is reconverted to analog form and subtracted from live analog video images of iodine administered by peripheral intravenous injection to produce a high resolution display of the cardiovascular system with contrast ten times greater than conventional fluoroscopy. Preliminary studies in dogs are compared with images obtained with our digital subtraction algorithms.
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