Installations of miniature picture archiving and communication systems, those having a single modality, doubled from 1994 to 1996, according to a study by the Concord Consulting Group (Concord, MA). A threefold increase from 1996 levels is expected by the year 2000. . . . Coreco (St. Laurent, Quebec, Canada) and Integral Vision (Farmington Hills, MI) have announced a joint distribution plan for the resale of Integral Vision`s VisionBlox machine-vision software, expected to generate more than $3.5 million in additional revenue for each company over the next few years. . . . Polaroid Graphics Imaging (Waltham, MA) and Polychrome Corp. (Fort Lee, NJ) have announced a joint agreement whereby Polaroid will exclusively license certain of its instant lithographic printing-plate technology to Polychrome for manufacture, use, and sale.