A hybrid computerized fluoroscopy technique for noninvasive cardiovascular imaging.
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.
D000818:Animals; D001921:Brain / Q000098:blood supply / Q000000981:diagnostic imaging; D002319:Cardiovascular System / Q000000981:diagnostic imaging*; D003201:Computers; D003203:Computers, Hybrid; D003287:Contrast Media / Q000008:administration & dosage; D004285:Dogs; D005471:Fluoroscopy / Q000379:methods*; D006321:Heart / Q000000981:diagnostic imaging; D007275:Injections, Intravenous; D007668:Kidney / Q000098:blood supply / Q000000981:diagnostic imaging; D008168:Lung / Q000098:blood supply / Q000000981:diagnostic imaging; D011856:Radiographic Image Enhancement
D003287:Contrast Media